/* ============================================================
   创新智能展馆 — 产品详情页样式
   ============================================================ */

:root{
  --ink:#0A1626;
  --navy:#0E2138;
  --navy-2:#132C49;
  --brand:#1F6FEB;
  --brand-d:#175BC7;
  --brand-l:#E8F0FE;
  --teal:#0E9E92;
  --amber:#D98B1F;

  --bg:#FFFFFF;
  --soft:#F4F6FA;
  --line:#E2E7EF;
  --line-2:#EDF0F5;

  --text:#1A2436;
  --text-2:#4C5A70;
  --text-3:#7A8699;

  --radius:4px;
  --radius-lg:6px;
  --shadow-s:0 1px 2px rgba(16,33,56,.05);
  --shadow-m:0 8px 24px rgba(16,33,56,.07);
  --shadow-l:0 18px 48px rgba(16,33,56,.10);

  --wrap:1200px;
  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Helvetica Neue",Arial,sans-serif;
}

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

html{scroll-behavior:smooth;scroll-padding-top:76px;-webkit-text-size-adjust:100%}

body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}

img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
h1,h2,h3,h4{margin:0;font-weight:600;line-height:1.32;letter-spacing:.01em}
p{margin:0}
ul,ol{margin:0;padding:0;list-style:none}
table{border-collapse:collapse;width:100%}

.wrap{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 32px}

/* ---------------- Hero ---------------- */
.hero{position:relative;padding:78px 0 76px;overflow:hidden;background:var(--ink)}
.hero-bg{position:absolute;inset:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;object-position:center 42%}
.hero-veil{
  position:absolute;inset:0;
  background:
    linear-gradient(180deg,rgba(8,20,36,.82) 0%,rgba(8,20,36,.72) 38%,rgba(8,20,36,.90) 100%),
    linear-gradient(90deg,rgba(8,20,36,.72) 0%,rgba(8,20,36,.28) 62%,rgba(8,20,36,.55) 100%);
}
.hero-inner{position:relative;z-index:2;max-width:900px}
.hero-eyebrow{
  display:inline-block;font-size:13px;letter-spacing:.08em;color:#A9C8F5;
  border:1px solid rgba(169,200,245,.34);border-radius:100px;padding:5px 15px;margin-bottom:24px;
  background:rgba(31,111,235,.14);
}
.hero h1{
  font-size:56px;font-weight:600;color:#fff;letter-spacing:.02em;
  line-height:1.14;margin-bottom:20px;
}
.hero-sub{font-size:20px;line-height:1.7;color:#DDE7F5;font-weight:400;max-width:760px}
.hero-desc{font-size:15px;line-height:1.85;color:#9FB2CB;margin-top:18px;max-width:720px}
.hero-actions{display:flex;gap:14px;margin-top:38px;flex-wrap:wrap}

.btn{
  display:inline-flex;align-items:center;justify-content:center;
  height:48px;padding:0 30px;font-size:15px;font-weight:500;border-radius:var(--radius);
  transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;
}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-d);transform:translateY(-1px)}
.btn-ghost{color:#E4EDFA;border:1px solid rgba(228,237,250,.36)}
.btn-ghost:hover{border-color:rgba(228,237,250,.7);background:rgba(255,255,255,.07)}

.hero-metrics{
  display:grid;grid-template-columns:repeat(4,1fr);gap:0;
  margin-top:64px;border-top:1px solid rgba(255,255,255,.16);
  padding-top:28px;
}
.hero-metrics li{padding-right:24px;border-right:1px solid rgba(255,255,255,.13)}
.hero-metrics li:last-child{border-right:none;padding-right:0}
.hero-metrics b{
  display:block;font-size:32px;font-weight:600;color:#fff;letter-spacing:.01em;line-height:1.2;
}
.hero-metrics b small{font-size:16px;font-weight:500;margin-left:2px}
.hero-metrics span{display:block;font-size:13.5px;color:#93A9C6;margin-top:6px}

/* ---------------- Section base ---------------- */
.section{padding:104px 0}
.section-soft{background:var(--soft)}
.section-dark{background:var(--navy);color:#DCE5F2}
.section-dark .sec-lead,.section-dark p{color:#A8B9D2}

.sec-head{display:flex;gap:24px;margin-bottom:56px;max-width:900px}
.sec-num{
  flex-shrink:0;font-size:13px;font-weight:600;letter-spacing:.1em;color:var(--brand);
  border-top:2px solid var(--brand);padding-top:10px;width:44px;
}
.sec-head-light .sec-num{color:#78AEFB;border-top-color:#78AEFB}
.sec-head h2{font-size:34px;letter-spacing:.02em;color:var(--ink)}
.sec-head-light h2{color:#fff}
.sec-lead{font-size:15.5px;color:var(--text-2);margin-top:14px;line-height:1.8}
.sec-head-light .sec-lead{color:#9CB0CA}

/* ---------------- 01 Overview ---------------- */
.overview-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:start}
.overview-text p{font-size:16px;line-height:1.9;color:var(--text-2)}
.overview-text p+p{margin-top:20px}
.overview-text strong{color:var(--ink);font-weight:600}

.overview-figure{margin:0}
.overview-figure img{
  width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:var(--radius-lg);
  box-shadow:var(--shadow-m);
}
.overview-figure figcaption,
.tech-figure figcaption,
.case-figure figcaption{
  font-size:13px;color:var(--text-3);margin-top:12px;line-height:1.7;
}

.arch{margin-top:64px;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;background:#fff}
.arch-row{display:flex;border-bottom:1px solid var(--line-2)}
.arch-row:last-child{border-bottom:none}
.arch-label{
  flex:0 0 108px;display:flex;align-items:center;justify-content:center;
  font-size:13.5px;font-weight:600;color:var(--ink);background:var(--soft);
  border-right:1px solid var(--line-2);letter-spacing:.04em;padding:18px 8px;
}
.arch-cells{flex:1;display:flex;flex-wrap:wrap;gap:10px;padding:16px 20px}
.arch-cells span{
  font-size:13.5px;color:var(--text-2);background:#F7F9FC;border:1px solid var(--line);
  border-radius:100px;padding:6px 16px;
}
.arch-row:nth-child(1) .arch-cells span{background:var(--brand-l);border-color:#CBDFFB;color:var(--brand-d);font-weight:500}

.value-row{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:28px}
.value-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:26px 24px;transition:box-shadow .2s ease,transform .2s ease}
.value-card:hover{box-shadow:var(--shadow-m);transform:translateY(-2px)}
.value-card h3{font-size:16px;color:var(--ink);margin-bottom:10px}
.value-card p{font-size:14.5px;line-height:1.8;color:var(--text-2)}

/* ---------------- 02 Problems ---------------- */
.prob-cols{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.prob-col{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:32px 30px}
.prob-col>h3{
  font-size:16.5px;color:var(--ink);display:flex;align-items:center;gap:10px;
  padding-bottom:20px;margin-bottom:8px;border-bottom:1px solid var(--line-2);
}
.dot{width:8px;height:8px;border-radius:50%;flex-shrink:0}
.dot-a{background:#D9634A}
.dot-b{background:var(--amber)}

.prob-list{counter-reset:pc}
.prob-list li{padding:22px 0 22px 44px;border-bottom:1px dashed var(--line);position:relative}
.prob-list li:last-child{border-bottom:none;padding-bottom:0}
.prob-list li::before{
  counter-increment:pc;content:counter(pc,decimal-leading-zero);
  position:absolute;left:0;top:24px;
  font-size:12.5px;font-weight:600;color:var(--text-3);letter-spacing:.06em;line-height:1.4;
}
.prob-list b{display:block;font-size:15.5px;font-weight:600;color:var(--ink);margin-bottom:6px}
.prob-list p{font-size:14.5px;line-height:1.8;color:var(--text-2)}

.solve-strip{
  display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);
  border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;margin-top:28px;
}
.solve-item{background:#fff;padding:28px 26px}
.solve-item span{
  display:inline-block;font-size:12px;font-weight:600;letter-spacing:.1em;color:var(--brand);
  margin-bottom:12px;
}
.solve-item b{display:block;font-size:16px;color:var(--ink);margin-bottom:8px}
.solve-item p{font-size:14px;line-height:1.78;color:var(--text-2)}

/* ---------------- 03 Functions / Tabs ---------------- */
.tabs{margin-top:8px}
.tab-bar{
  display:flex;gap:6px;border-bottom:1px solid var(--line);overflow-x:auto;
  scrollbar-width:none;
}
.tab-bar::-webkit-scrollbar{display:none}
.tab-btn{
  flex-shrink:0;padding:14px 24px;font-size:15px;color:var(--text-2);
  border-bottom:2px solid transparent;margin-bottom:-1px;
  transition:color .18s ease,border-color .18s ease;
  white-space:nowrap;
}
.tab-btn:hover{color:var(--brand)}
.tab-btn.is-active{color:var(--brand);border-bottom-color:var(--brand);font-weight:600}

.tab-panel{display:none;padding-top:44px;animation:fade .35s ease}
.tab-panel.is-active{display:block}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

.panel-intro{font-size:16px;line-height:1.85;color:var(--text-2);max-width:820px;margin-bottom:44px}

.fn-group{margin-bottom:52px}
.fn-group:last-child{margin-bottom:0}
.fn-group>h3{
  font-size:19px;color:var(--ink);margin-bottom:24px;padding-left:14px;
  border-left:3px solid var(--brand);line-height:1.4;
}
.fn-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.fn-cards-1{grid-template-columns:1fr}
.fn-cards article{
  background:var(--soft);border:1px solid var(--line-2);border-radius:var(--radius-lg);
  padding:26px 24px;transition:background .2s ease,border-color .2s ease,box-shadow .2s ease;
}
.fn-cards article:hover{background:#fff;border-color:#CFDDF3;box-shadow:var(--shadow-m)}
.fn-cards h4{font-size:15.5px;color:var(--ink);margin-bottom:10px}
.fn-cards h4::before{
  content:"";display:inline-block;width:6px;height:6px;border-radius:50%;
  background:var(--brand);margin-right:9px;vertical-align:2px;
}
.fn-cards p{font-size:14.2px;line-height:1.82;color:var(--text-2)}

.fn-table{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line-2);border:1px solid var(--line-2);border-radius:var(--radius-lg);overflow:hidden}
.fn-table>div{background:#fff;padding:22px 24px}
.fn-table b{display:block;font-size:15px;color:var(--ink);margin-bottom:8px;font-weight:600}
.fn-table b::before{content:"";display:inline-block;width:6px;height:6px;border-radius:50%;background:var(--brand);margin-right:9px;vertical-align:2px}
.fn-table p{font-size:14px;line-height:1.8;color:var(--text-2)}

.split{display:grid;grid-template-columns:1.06fr .94fr;gap:44px;align-items:start}
.split figure{margin:0;position:sticky;top:96px}
.split figure img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-lg);box-shadow:var(--shadow-m)}

/* ---------------- 04 Tech ---------------- */
.tech-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.tech-card{
  background:var(--navy-2);border:1px solid rgba(255,255,255,.09);border-radius:var(--radius-lg);
  padding:32px 30px;
}
.tech-card h3{
  font-size:18px;color:#fff;margin-bottom:22px;padding-bottom:16px;
  border-bottom:1px solid rgba(255,255,255,.12);
}
.tech-card dl{margin:0}
.tech-card dl>div{padding:14px 0;border-bottom:1px dashed rgba(255,255,255,.1)}
.tech-card dl>div:last-child{border-bottom:none;padding-bottom:0}
.tech-card dt{font-size:14.5px;font-weight:600;color:#8FB8F5;margin-bottom:6px}
.tech-card dd{margin:0;font-size:14.2px;line-height:1.8;color:#A8B9D2}
.tech-list li{
  font-size:14.2px;line-height:1.8;color:#A8B9D2;padding:11px 0 11px 20px;position:relative;
}
.tech-list li::before{
  content:"";position:absolute;left:0;top:20px;width:6px;height:6px;border-radius:50%;
  background:#4E8CF0;
}
.tech-list b{color:#DCE5F2;font-weight:600}

.tech-figure{margin:56px 0 0}
.tech-figure img{width:100%;height:380px;object-fit:cover;border-radius:var(--radius-lg);opacity:.92}
.tech-figure figcaption{color:#8A9BB4}

/* ---------------- 05 Scenes ---------------- */
.scene-list{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden}
.scene-list li{background:#fff;padding:26px 26px;transition:background .2s ease}
.scene-list li:hover{background:#FAFCFF}
.scene-list b{display:block;font-size:15.5px;color:var(--ink);margin-bottom:8px}
.scene-list span{font-size:13.8px;line-height:1.75;color:var(--text-3)}

/* ---------------- 06 Cases ---------------- */
.case{background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden}
.case-head{padding:34px 40px 28px;border-bottom:1px solid var(--line-2);background:linear-gradient(180deg,#FAFCFF,#fff)}
.case-head h3{font-size:23px;color:var(--ink);margin-bottom:18px}
.case-tags{display:flex;flex-wrap:wrap;gap:10px}
.case-tags li{
  font-size:13px;color:var(--brand-d);background:var(--brand-l);border:1px solid #D2E2FB;
  border-radius:100px;padding:5px 14px;
}
.case-body{display:grid;grid-template-columns:1.08fr .92fr;gap:44px;padding:40px}
.case-text h4{font-size:15.5px;color:var(--ink);margin:0 0 12px;padding-left:12px;border-left:3px solid var(--brand)}
.case-text h4:not(:first-child){margin-top:30px}
.case-text p{font-size:15px;line-height:1.88;color:var(--text-2)}
.case-list li{
  font-size:14.8px;line-height:1.85;color:var(--text-2);padding:9px 0 9px 22px;position:relative;
}
.case-list li::before{
  content:"";position:absolute;left:0;top:18px;width:7px;height:7px;border:2px solid var(--brand);
  border-radius:50%;
}
.case-figure{margin:0}
.case-figure img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:var(--radius-lg);box-shadow:var(--shadow-m)}

.case-table-wrap{padding:0 40px 40px}
.case-table-wrap h4{font-size:15.5px;color:var(--ink);margin:0 0 18px;padding-left:12px;border-left:3px solid var(--brand)}
.case-table{border:1px solid var(--line);border-radius:var(--radius-lg);overflow:hidden;font-size:14.5px}
.case-table th,.case-table td{padding:15px 22px;text-align:left;border-bottom:1px solid var(--line-2)}
.case-table thead th{background:var(--soft);font-weight:600;color:var(--ink);font-size:14px;letter-spacing:.02em}
.case-table tbody tr:last-child td{border-bottom:none}
.case-table td:first-child{color:var(--ink);font-weight:500;width:22%}
.case-table td:last-child{background:#F7FAFF;color:var(--brand-d);font-weight:500}

/* ---------------- 07 Contact ---------------- */
.contact-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.contact-item{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px 28px;
  transition:box-shadow .2s ease,transform .2s ease;
}
.contact-item:hover{box-shadow:var(--shadow-m);transform:translateY(-2px)}
.ci-label{display:block;font-size:13px;letter-spacing:.06em;color:var(--text-3);margin-bottom:12px}
.ci-value{display:block;font-size:19px;font-weight:600;color:var(--ink);letter-spacing:.01em;line-height:1.5}
a.ci-value:hover{color:var(--brand)}
.ci-addr{font-size:16px;font-weight:500;line-height:1.65}

/* ---------------- To top ---------------- */
.to-top{
  position:fixed;right:28px;bottom:28px;z-index:90;width:44px;height:44px;
  display:flex;align-items:center;justify-content:center;border-radius:var(--radius);
  background:var(--brand);color:#fff;box-shadow:var(--shadow-m);
  opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .25s ease,transform .25s ease,visibility .25s ease,background .18s ease;
}
.to-top.is-show{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--brand-d)}

/* ---------------- Reveal ---------------- */
.reveal{opacity:0;transform:translateY(18px);transition:opacity .6s cubic-bezier(.22,.7,.3,1),transform .6s cubic-bezier(.22,.7,.3,1)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}

/* ---------------- Responsive ---------------- */
@media (max-width:1080px){
  .hero h1{font-size:46px}
  .value-row{grid-template-columns:repeat(2,1fr)}
  .fn-cards{grid-template-columns:repeat(2,1fr)}
  .scene-list{grid-template-columns:repeat(2,1fr)}
  .tech-grid{gap:20px}
}

@media (max-width:900px){
  .wrap{padding:0 24px}
  .hero{padding:54px 0 60px}
  .hero h1{font-size:38px}
  .hero-sub{font-size:17px}
  .hero-metrics{grid-template-columns:repeat(2,1fr);gap:24px 0;margin-top:46px}
  .hero-metrics li:nth-child(2){border-right:none;padding-right:0}
  .hero-metrics li:nth-child(3),
  .hero-metrics li:nth-child(4){padding-top:20px;border-top:1px solid rgba(255,255,255,.12)}

  .section{padding:76px 0}
  .sec-head{flex-direction:column;gap:16px;margin-bottom:40px}
  .sec-num{width:auto;border-top:none;border-left:2px solid var(--brand);padding:0 0 0 10px;line-height:1.2}
  .sec-head-light .sec-num{border-left-color:#78AEFB}
  .sec-head h2{font-size:27px}

  .overview-grid,.prob-cols,.split,.case-body,.tech-grid,.contact-grid{grid-template-columns:1fr;gap:32px}
  .split figure,.case-figure{position:static}
  .value-row,.fn-cards,.fn-table,.scene-list,.solve-strip{grid-template-columns:1fr}
  .arch-label{flex:0 0 74px;font-size:12.5px;padding:14px 6px}
  .arch-cells{padding:14px 16px;gap:8px}
  .case-head{padding:28px 24px 24px}
  .case-head h3{font-size:19px}
  .case-body{padding:28px 24px}
  .case-table-wrap{padding:0 24px 28px}
  .case-table{font-size:13.5px}
  .case-table th,.case-table td{padding:12px 14px}
  .to-top{right:18px;bottom:18px}
}

@media (max-width:560px){
  .hero h1{font-size:32px}
  .hero-sub{font-size:16px}
  .hero-metrics b{font-size:26px}
  .section{padding:64px 0}
  .sec-head h2{font-size:24px}
  .tab-btn{padding:12px 16px;font-size:14px}
  .btn{width:100%}
  .hero-actions{flex-direction:column}
}

@media print{
  .to-top{display:none}
  .tab-panel{display:block !important}
  .section{padding:24px 0;break-inside:avoid}
}