/* =========================================================
   mro.tv — MRO 工业客户版 AI 短视频生产中枢
   设计系统 / Design Tokens
   ========================================================= */
:root{
  /* 品牌色 */
  --orange:        #F25C05;
  --orange-deep:   #D94900;
  --orange-soft:   #FFF1E8;
  --navy:          #0B1F33;
  --navy-2:        #12293F;
  --navy-3:        #1B3855;
  --steel:         #2E6CA8;
  --steel-soft:    #E8F0F8;

  /* 中性 */
  --bg:            #F6F7F9;
  --bg-2:          #EEF1F5;
  --card:          #FFFFFF;
  --ink:           #16202E;
  --ink-2:         #2C3A4C;
  --muted:         #5E6E7E;
  --line:          #E2E8F0;
  --line-strong:   #CBD5E1;

  /* 效果 */
  --shadow-sm: 0 1px 2px rgba(11,31,51,.06), 0 2px 8px rgba(11,31,51,.05);
  --shadow-md: 0 6px 18px rgba(11,31,51,.08), 0 2px 6px rgba(11,31,51,.06);
  --shadow-lg: 0 18px 48px rgba(11,31,51,.14);
  --radius:    16px;
  --radius-sm: 10px;
  --maxw:      1160px;
  --header-h:  68px;

  --font: "Inter","PingFang SC","Microsoft YaHei","Hiragino Sans GB",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; -webkit-text-size-adjust:100%; }
body{
  margin:0; font-family:var(--font); color:var(--ink); background:var(--bg);
  line-height:1.65; font-size:16px; -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{ max-width:100%; display:block; }
a{ color:inherit; text-decoration:none; }
h1,h2,h3,h4{ margin:0; line-height:1.18; color:var(--ink); letter-spacing:-.02em; font-weight:800; }
p{ margin:0; }
ul{ margin:0; padding:0; list-style:none; }
button{ font-family:inherit; cursor:pointer; }

/* ---------- 容器 / 栅格 ---------- */
.wrap{ width:100%; max-width:var(--maxw); margin:0 auto; padding:0 24px; }
.section{ padding:84px 0; }
.section.tight{ padding:64px 0; }
.bg-navy{ background:var(--navy); color:#fff; }
.bg-navy h1,.bg-navy h2,.bg-navy h3{ color:#fff; }
.bg-soft{ background:var(--bg-2); }
.bg-white{ background:#fff; }

/* ---------- 顶栏 ---------- */
.header{
  position:sticky; top:0; z-index:50; height:var(--header-h);
  background:rgba(255,255,255,.86); backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid var(--line);
}
.header .wrap{ display:flex; align-items:center; justify-content:space-between; height:100%; }
.brand{ display:flex; align-items:center; gap:10px; font-weight:800; font-size:20px; letter-spacing:-.03em; }
.brand .mark{
  width:34px; height:34px; border-radius:9px; background:linear-gradient(135deg,var(--orange),var(--orange-deep));
  display:grid; place-items:center; color:#fff; font-weight:900; font-size:15px; box-shadow:var(--shadow-sm);
}
.brand .mark span{ transform:translateY(-1px); }
.brand b{ color:var(--navy); }
.brand i{ color:var(--orange); font-style:normal; }
.nav{ display:flex; align-items:center; gap:4px; }
.nav a{
  padding:9px 14px; border-radius:9px; font-weight:600; font-size:15px; color:var(--ink-2);
  transition:.18s;
}
.nav a:hover{ background:var(--bg-2); color:var(--navy); }
.nav a.active{ color:var(--orange); }
.header .cta-row{ display:flex; align-items:center; gap:10px; }

/* 移动端菜单按钮 */
.menu-btn{ display:none; width:42px; height:42px; border:1px solid var(--line); border-radius:10px; background:#fff;
  align-items:center; justify-content:center; flex-direction:column; gap:4px; }
.menu-btn span{ width:18px; height:2px; background:var(--ink); border-radius:2px; transition:.2s; }

/* ---------- 按钮 ---------- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:8px;
  padding:13px 22px; border-radius:11px; font-weight:700; font-size:15px; border:1px solid transparent;
  transition:.18s; white-space:nowrap;
}
.btn-primary{ background:var(--orange); color:#fff; box-shadow:0 8px 20px rgba(242,92,5,.28); }
.btn-primary:hover{ background:var(--orange-deep); transform:translateY(-1px); box-shadow:0 12px 26px rgba(242,92,5,.34); }
.btn-ghost{ background:transparent; color:var(--ink); border-color:var(--line-strong); }
.btn-ghost:hover{ border-color:var(--ink); }
.btn-light{ background:#fff; color:var(--navy); }
.btn-light:hover{ transform:translateY(-1px); box-shadow:var(--shadow-md); }
.btn-outline-light{ background:transparent; color:#fff; border-color:rgba(255,255,255,.4); }
.btn-outline-light:hover{ background:rgba(255,255,255,.1); }
.btn-lg{ padding:16px 30px; font-size:16px; }
.btn-sm{ padding:9px 16px; font-size:14px; }

/* ---------- 标签 / 眼睛线 ---------- */
.eyebrow{ display:inline-flex; align-items:center; gap:8px; font-size:13px; font-weight:700; letter-spacing:.12em;
  text-transform:uppercase; color:var(--orange); margin-bottom:14px; }
.eyebrow::before{ content:""; width:26px; height:2px; background:var(--orange); border-radius:2px; }
.eyebrow.center::before{ display:none; }

/* ---------- 标题块 ---------- */
.sec-head{ max-width:720px; margin-bottom:48px; }
.sec-head.center{ margin-left:auto; margin-right:auto; text-align:center; }
.sec-head h2{ font-size:clamp(1.7rem,3.4vw,2.5rem); margin-bottom:14px; }
.sec-head p{ color:var(--muted); font-size:17px; }

/* ---------- HERO ---------- */
.hero{
  position:relative; overflow:hidden; background:var(--navy) url(../img/hero.jpg) center/cover no-repeat; color:#fff;
  padding:96px 0 86px;
}
.hero::before{
  content:""; position:absolute; inset:0;
  background:
    linear-gradient(rgba(11,31,51,.74),rgba(11,31,51,.86)),
    radial-gradient(900px 500px at 85% -10%, rgba(242,92,5,.34), transparent 60%),
    radial-gradient(700px 500px at 10% 110%, rgba(46,108,168,.34), transparent 60%);
  pointer-events:none;
}
.hero::after{
  content:""; position:absolute; inset:0; opacity:.10; pointer-events:none;
  background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);
  background-size:46px 46px; mask:radial-gradient(circle at 70% 30%,#000,transparent 75%);
}
.hero .wrap{ position:relative; z-index:1; }
.hero-grid{ display:grid; grid-template-columns:1.15fr .85fr; gap:56px; align-items:center; }
.hero h1{ font-size:clamp(2.3rem,5vw,3.9rem); line-height:1.08; color:#fff; }
.hero h1 .hl{ color:var(--orange); }
.hero .sub{ margin-top:20px; font-size:19px; color:#C7D3E0; max-width:560px; }
.hero .cta{ display:flex; gap:14px; margin-top:32px; flex-wrap:wrap; }
.trust-bar{
  margin-top:34px; display:flex; flex-wrap:wrap; gap:10px 26px; align-items:center;
  color:#AEBED0; font-size:14px; font-weight:600;
}
.trust-bar .t{ display:inline-flex; align-items:center; gap:8px; }
.trust-bar .dot{ width:7px; height:7px; border-radius:50%; background:var(--orange); }

/* Hero 视觉卡 */
.hero-visual{ position:relative; }
.hero-card{
  background:linear-gradient(160deg,var(--navy-2),var(--navy-3)); border:1px solid rgba(255,255,255,.10);
  border-radius:20px; padding:22px; box-shadow:var(--shadow-lg);
}
.hero-card .tag{ font-size:12px; letter-spacing:.1em; text-transform:uppercase; color:var(--orange); font-weight:700; }
.hero-card h4{ color:#fff; font-size:18px; margin:6px 0 14px; }
.hero-card .row{ display:flex; align-items:center; gap:12px; padding:11px 0; border-top:1px solid rgba(255,255,255,.08); }
.hero-card .row .ic{ width:36px; height:36px; border-radius:9px; background:rgba(242,92,5,.18); color:var(--orange);
  display:grid; place-items:center; flex:none; }
.hero-card .row b{ color:#fff; font-size:14px; display:block; }
.hero-card .row small{ color:#9FB0C4; font-size:12px; }
.float-badge{
  position:absolute; right:-14px; bottom:-18px; background:#fff; color:var(--navy); border-radius:14px;
  padding:14px 18px; box-shadow:var(--shadow-lg); font-weight:800; display:flex; align-items:center; gap:10px;
}
.float-badge .n{ font-size:26px; color:var(--orange); line-height:1; }
.float-badge small{ display:block; font-size:11px; color:var(--muted); font-weight:600; }

/* ---------- 卡片通用 ---------- */
.card{ background:var(--card); border:1px solid var(--line); border-radius:var(--radius); padding:28px; box-shadow:var(--shadow-sm); transition:.2s; }
.card:hover{ transform:translateY(-4px); box-shadow:var(--shadow-md); border-color:var(--line-strong); }
.grid{ display:grid; gap:22px; }
.grid-2{ grid-template-columns:repeat(2,1fr); }
.grid-3{ grid-template-columns:repeat(3,1fr); }
.grid-4{ grid-template-columns:repeat(4,1fr); }

/* 痛点 / 特性卡 */
.feature .ic{
  width:52px; height:52px; border-radius:13px; background:var(--orange-soft); color:var(--orange);
  display:grid; place-items:center; margin-bottom:18px;
}
.feature h3{ font-size:19px; margin-bottom:10px; }
.feature p{ color:var(--muted); font-size:15px; }
.feature .num{ position:absolute; }

/* 服务卡 */
.svc{ position:relative; overflow:hidden; }
.svc .top{ display:flex; align-items:center; gap:14px; margin-bottom:16px; }
.svc .top .ic{ width:50px; height:50px; border-radius:13px; background:var(--navy); color:#fff; display:grid; place-items:center; flex:none; }
.svc h3{ font-size:20px; }
.svc .pill{ font-size:12px; font-weight:700; color:var(--orange); background:var(--orange-soft); padding:4px 10px; border-radius:999px; margin-left:auto; }
.svc p{ color:var(--muted); font-size:15px; margin-bottom:14px; }
.svc ul.check{ margin-top:6px; }
.svc ul.check li{ display:flex; gap:10px; padding:7px 0; font-size:14.5px; color:var(--ink-2); border-top:1px dashed var(--line); }
.svc ul.check li:first-child{ border-top:0; }
.svc ul.check .tk{ color:var(--orange); flex:none; margin-top:3px; }
.svc .more{ display:inline-flex; align-items:center; gap:6px; margin-top:16px; color:var(--orange); font-weight:700; font-size:14.5px; }

/* 定价卡 */
.price{ position:relative; display:flex; flex-direction:column; }
.price.feat{ border-color:var(--orange); box-shadow:0 14px 40px rgba(242,92,5,.18); }
.price .flag{ position:absolute; top:-13px; left:50%; transform:translateX(-50%); background:var(--orange); color:#fff;
  font-size:12px; font-weight:800; padding:5px 14px; border-radius:999px; letter-spacing:.04em; }
.price .tier{ font-size:15px; font-weight:700; color:var(--muted); letter-spacing:.04em; }
.price .name{ font-size:24px; margin:6px 0 4px; }
.price .desc{ color:var(--muted); font-size:14px; min-height:42px; }
.price .amt{ margin:18px 0; padding:14px 0; border-top:1px solid var(--line); border-bottom:1px solid var(--line); }
.price .amt b{ font-size:34px; color:var(--ink); }
.price .amt .u{ color:var(--muted); font-size:14px; font-weight:600; }
.price ul{ margin:6px 0 22px; }
.price ul li{ display:flex; gap:10px; padding:8px 0; font-size:14.5px; color:var(--ink-2); border-top:1px dashed var(--line); }
.price ul li:first-child{ border-top:0; }
.price ul .tk{ color:var(--orange); flex:none; margin-top:3px; }
.price .btn{ margin-top:auto; width:100%; }

/* 客户画像卡 */
.persona{ background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:26px; box-shadow:var(--shadow-sm); transition:.2s; }
.persona:hover{ box-shadow:var(--shadow-md); transform:translateY(-3px); }
.persona .role{ font-size:13px; font-weight:700; color:var(--steel); letter-spacing:.06em; text-transform:uppercase; }
.persona h3{ font-size:19px; margin:8px 0 12px; }
.persona .pain{ background:var(--bg-2); border-radius:10px; padding:12px 14px; font-size:14px; color:var(--ink-2); margin-bottom:12px; }
.persona .help{ font-size:14.5px; color:var(--muted); }
.persona .help b{ color:var(--orange); }

/* 案例卡 */
.case{ background:#fff; border:1px solid var(--line); border-radius:var(--radius); overflow:hidden; box-shadow:var(--shadow-sm); transition:.2s; }
.case:hover{ transform:translateY(-4px); box-shadow:var(--shadow-md); }
.case .cover{ position:relative; aspect-ratio:16/9; overflow:hidden; background:var(--navy); }
.case .cover img{ width:100%; height:100%; object-fit:cover; transition:.3s; }
.case:hover .cover img{ transform:scale(1.05); }
.case .cover .play{ position:absolute; inset:0; display:grid; place-items:center; }
.case .cover .play .p{ width:58px; height:58px; border-radius:50%; background:rgba(11,31,51,.55); backdrop-filter:blur(4px);
  border:2px solid rgba(255,255,255,.8); display:grid; place-items:center; transition:.2s; }
.case:hover .cover .play .p{ background:var(--orange); border-color:var(--orange); }
.case .cover .play svg{ margin-left:3px; }
.case .cover .dur{ position:absolute; right:10px; bottom:10px; background:rgba(11,31,51,.7); color:#fff; font-size:12px; font-weight:600; padding:3px 8px; border-radius:6px; }
.case .cover .cat{ position:absolute; left:10px; top:10px; background:var(--orange); color:#fff; font-size:12px; font-weight:700; padding:4px 10px; border-radius:999px; }
.case .body{ padding:18px 18px 20px; }
.case .body h3{ font-size:16.5px; margin-bottom:8px; line-height:1.35; }
.case .meta{ display:flex; gap:8px; flex-wrap:wrap; align-items:center; color:var(--muted); font-size:13px; }
.case .tag2{ background:var(--bg-2); color:var(--ink-2); padding:3px 9px; border-radius:6px; font-weight:600; }
.case .plays{ margin-left:auto; display:inline-flex; align-items:center; gap:5px; }

/* 筛选条 */
.filters{ display:flex; flex-wrap:wrap; gap:10px; margin-bottom:30px; }
.filters .f{ padding:9px 16px; border-radius:999px; border:1px solid var(--line-strong); background:#fff; font-weight:600; font-size:14px; color:var(--ink-2); transition:.18s; }
.filters .f:hover{ border-color:var(--orange); color:var(--orange); }
.filters .f.active{ background:var(--orange); border-color:var(--orange); color:#fff; }

/* 证言 */
.quote{ background:#fff; border:1px solid var(--line); border-radius:var(--radius); padding:28px; box-shadow:var(--shadow-sm); position:relative; }
.quote .q{ font-size:16px; color:var(--ink-2); line-height:1.7; }
.quote .who{ display:flex; align-items:center; gap:12px; margin-top:18px; }
.quote .av{ width:44px; height:44px; border-radius:50%; background:linear-gradient(135deg,var(--steel),var(--navy)); color:#fff; display:grid; place-items:center; font-weight:800; flex:none; }
.quote .who b{ display:block; font-size:14.5px; }
.quote .who small{ color:var(--muted); }

/* Logo 墙 */
.logos{ display:flex; flex-wrap:wrap; gap:14px; justify-content:center; }
.logos .lg{ height:54px; padding:0 26px; display:grid; place-items:center; background:#fff; border:1px solid var(--line);
  border-radius:12px; color:var(--muted); font-weight:800; letter-spacing:.02em; font-size:16px; }

/* 流程 */
.flow{ display:grid; grid-template-columns:repeat(6,1fr); gap:0; counter-reset:step; }
.flow .st{ position:relative; padding:26px 14px 0; text-align:center; }
.flow .st::before{ counter-increment:step; content:counter(step); width:42px; height:42px; border-radius:50%; background:var(--navy); color:#fff;
  display:grid; place-items:center; font-weight:800; margin:0 auto 14px; position:relative; z-index:2; }
.flow .st::after{ content:""; position:absolute; top:46px; left:50%; width:100%; height:2px; background:var(--line); z-index:1; }
.flow .st:last-child::after{ display:none; }
.flow .st h4{ font-size:15px; }
.flow .st p{ font-size:13px; color:var(--muted); margin-top:4px; }

/* FAQ */
.faq{ max-width:820px; margin:0 auto; }
.faq details{ background:#fff; border:1px solid var(--line); border-radius:12px; padding:0 20px; margin-bottom:12px; transition:.2s; }
.faq details[open]{ box-shadow:var(--shadow-sm); border-color:var(--line-strong); }
.faq summary{ cursor:pointer; padding:18px 0; font-weight:700; font-size:16px; list-style:none; display:flex; justify-content:space-between; align-items:center; }
.faq summary::-webkit-details-marker{ display:none; }
.faq summary .pm{ width:24px; height:24px; flex:none; position:relative; }
.faq summary .pm::before,.faq summary .pm::after{ content:""; position:absolute; background:var(--orange); border-radius:2px; }
.faq summary .pm::before{ top:11px; left:4px; width:16px; height:2px; }
.faq summary .pm::after{ top:4px; left:11px; width:2px; height:16px; transition:.2s; }
.faq details[open] summary .pm::after{ transform:rotate(90deg); opacity:0; }
.faq .ans{ padding:0 0 18px; color:var(--muted); font-size:15px; }

/* 收尾 CTA */
.final{ background:linear-gradient(135deg,var(--navy),var(--navy-3)); color:#fff; border-radius:24px; padding:54px; text-align:center; position:relative; overflow:hidden; }
.final::before{ content:""; position:absolute; inset:0; background:radial-gradient(600px 300px at 50% -20%,rgba(242,92,5,.35),transparent 60%); }
.final .wrap-in{ position:relative; z-index:1; }
.final h2{ color:#fff; font-size:clamp(1.6rem,3vw,2.3rem); }
.final p{ color:#C7D3E0; margin:14px auto 28px; max-width:560px; }
.final .cta{ display:flex; gap:14px; justify-content:center; flex-wrap:wrap; }

/* 企微二维码块 */
.qr-block{ display:flex; gap:22px; align-items:center; background:rgba(255,255,255,.06); border:1px solid rgba(255,255,255,.14);
  border-radius:16px; padding:22px; max-width:440px; margin:0 auto; }
.qr-block .qr{ width:120px; height:120px; border-radius:12px; background:#fff; flex:none; display:grid; place-items:center; overflow:hidden; }
.qr-block .qr img{ width:100%; height:100%; object-fit:contain; }
.qr-block .qr .ph{ font-size:11px; color:var(--muted); text-align:center; padding:8px; line-height:1.4; }
.qr-block .txt{ text-align:left; color:#Dbe4ee; font-size:14px; }
.qr-block .txt b{ color:#fff; display:block; font-size:15px; margin-bottom:4px; }

/* 页脚 */
.footer{ background:var(--navy); color:#AEBED0; padding:60px 0 30px; }
.footer .cols{ display:grid; grid-template-columns:1.5fr 1fr 1fr 1fr; gap:30px; }
.footer .brand b{ color:#fff; }
.footer h5{ color:#fff; font-size:14px; letter-spacing:.06em; text-transform:uppercase; margin:0 0 16px; }
.footer a{ color:#AEBED0; display:block; padding:6px 0; font-size:14.5px; transition:.15s; }
.footer a:hover{ color:#fff; }
.footer .about{ font-size:14px; line-height:1.7; max-width:340px; margin-top:14px; }
.footer .bottom{ margin-top:40px; padding-top:22px; border-top:1px solid rgba(255,255,255,.1); display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px; font-size:13px; }
.footer .bottom a{ display:inline; padding:0; margin-left:16px; }

/* 表单 */
.form-grid{ display:grid; grid-template-columns:1fr 1fr; gap:18px; }
.field{ display:flex; flex-direction:column; gap:7px; }
.field.full{ grid-column:1/-1; }
.field label{ font-size:14px; font-weight:600; color:var(--ink-2); }
.field label .req{ color:var(--orange); }
.field input,.field select,.field textarea{
  font-family:inherit; font-size:15px; padding:12px 14px; border:1px solid var(--line-strong); border-radius:11px;
  background:#fff; color:var(--ink); transition:.15s; width:100%;
}
.field input:focus,.field select:focus,.field textarea:focus{ outline:none; border-color:var(--orange); box-shadow:0 0 0 3px var(--orange-soft); }
.field textarea{ resize:vertical; min-height:110px; }
.form-note{ font-size:13px; color:var(--muted); }
.form-ok{ display:none; background:var(--steel-soft); border:1px solid var(--steel); color:var(--navy); border-radius:12px; padding:16px 18px; font-weight:600; }
.form-err{ display:none; background:#FDECEC; border:1px solid #F3B0B0; color:#A12; border-radius:12px; padding:14px 16px; font-size:14px; }

/* 联系页布局 */
.contact-grid{ display:grid; grid-template-columns:1.1fr .9fr; gap:40px; align-items:start; }
.info-list li{ display:flex; gap:14px; padding:16px 0; border-bottom:1px solid var(--line); }
.info-list .ic{ width:42px; height:42px; border-radius:11px; background:var(--orange-soft); color:var(--orange); display:grid; place-items:center; flex:none; }
.info-list b{ display:block; font-size:15px; }
.info-list small{ color:var(--muted); }

/* 统计条 */
.stats{ display:grid; grid-template-columns:repeat(4,1fr); gap:20px; text-align:center; }
.stats .s .n{ font-size:38px; font-weight:900; color:var(--orange); letter-spacing:-.02em; }
.stats .s .l{ color:#AEBED0; font-size:14px; margin-top:4px; }

/* 工具 */
.center{ text-align:center; }
.mt-s{ margin-top:14px; } .mt-m{ margin-top:24px; } .mt-l{ margin-top:40px; }
.mb-s{ margin-bottom:14px; } .mb-m{ margin-bottom:24px; }
.lead{ font-size:17px; color:var(--muted); }
.divider{ height:1px; background:var(--line); margin:0; border:0; }

/* 面包屑 */
.crumb{ font-size:14px; color:var(--muted); padding:18px 0 0; }
.crumb a:hover{ color:var(--orange); }

/* ---------- 响应式 ---------- */
@media(max-width:960px){
  .hero-grid{ grid-template-columns:1fr; gap:40px; }
  .hero-visual{ max-width:460px; }
  .grid-3,.grid-4{ grid-template-columns:repeat(2,1fr); }
  .flow{ grid-template-columns:repeat(3,1fr); row-gap:30px; }
  .flow .st::after{ display:none; }
  .cols,.contact-grid,.footer .cols{ grid-template-columns:1fr 1fr; }
  .stats{ grid-template-columns:repeat(2,1fr); }
}
@media(max-width:680px){
  .section{ padding:60px 0; }
  .nav{ position:fixed; top:var(--header-h); left:0; right:0; background:#fff; flex-direction:column; align-items:stretch;
    padding:14px 20px 22px; gap:4px; border-bottom:1px solid var(--line); box-shadow:var(--shadow-md);
    transform:translateY(-130%); transition:.25s; z-index:40; }
  .nav.open{ transform:translateY(0); }
  .nav a{ padding:12px 14px; }
  .header .cta-row .btn-ghost{ display:none; }
  .menu-btn{ display:flex; }
  .grid-2,.grid-3,.grid-4{ grid-template-columns:1fr; }
  .form-grid{ grid-template-columns:1fr; }
  .final{ padding:36px 22px; }
  .hero{ padding:64px 0 60px; }
  .sec-head{ margin-bottom:34px; }
  .footer .cols{ grid-template-columns:1fr; gap:24px; }
}