/* ============ 南充达彼思广告有限公司 · 极简高级商务风 ============ */
:root{
  --cream:#fbfaf8; --paper:#ffffff; --ink:#17130d; --ink-2:#3a332b;
  --muted:#8a8175; --gold:#b8875a; --gold-d:#9c6f44; --line:#e9e3da;
  --dark:#15110c; --dark-2:#221b13; --r:14px; --maxw:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  color:var(--ink);background:var(--cream);line-height:1.75;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.small-cap{font-size:12px;letter-spacing:.32em;text-transform:uppercase;color:var(--gold);font-weight:600}
.section{padding:84px 0}
.section.alt{background:var(--paper)}
.section.dark{background:var(--dark);color:#efe9e0}
.h-title{font-size:32px;font-weight:800;letter-spacing:.04em;margin:10px 0 6px}
.h-sub{color:var(--muted);margin-bottom:44px}
.h-sub.dark{color:#b9ad9e}
.gold-rule{width:46px;height:3px;background:var(--gold);border-radius:2px;margin:0 auto 22px}
.center{text-align:center}

/* ===== 导航 ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:50;transition:.3s;padding:16px 0}
.nav.on{background:rgba(251,250,248,.94);backdrop-filter:blur(10px);
  box-shadow:0 1px 0 var(--line);padding:10px 0}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:16px;letter-spacing:.02em;white-space:nowrap;flex-shrink:0}
.brand>span{white-space:nowrap;min-width:max-content}
.brand .mark{width:32px;height:32px;flex-shrink:0;border-radius:8px;background:var(--gold);
  display:grid;place-items:center;color:#fff;font-size:12px;font-weight:800;letter-spacing:.02em}
.brand small{display:block;font-size:10px;letter-spacing:.22em;color:var(--muted);font-weight:600;white-space:nowrap}
.nav-inner{display:flex;align-items:center;justify-content:space-between;gap:18px}
.nav ul{display:flex;flex-wrap:nowrap;gap:20px;list-style:none;margin:0;padding:0;font-size:14px}
.nav ul li{white-space:nowrap}
.nav ul a{padding:6px 0;position:relative;color:var(--ink-2);font-weight:500;white-space:nowrap}
.nav.on ul a{color:var(--ink-2)}
.nav ul a:after{content:"";position:absolute;left:0;bottom:0;width:0;height:2px;background:var(--gold);transition:.25s}
.nav ul a:hover:after,.nav ul a.active:after{width:100%}
.nav .cta{background:var(--ink);color:#fff;padding:9px 18px;border-radius:999px;font-size:14px;font-weight:600}
.nav.on .cta{background:var(--gold)}
.lang-switch{display:flex;gap:4px;align-items:center;margin-left:10px}
.lang-switch button{font:inherit;font-size:13px;line-height:1;padding:6px 11px;border:1px solid var(--line);background:transparent;color:var(--ink-2);border-radius:999px;cursor:pointer;transition:.2s}
.lang-switch button:hover{border-color:var(--gold)}
.lang-switch button.active{background:var(--gold);border-color:var(--gold);color:#fff}
@media(max-width:860px){.lang-switch{margin-left:auto}}
.nav-toggle{display:none;background:none;border:0;font-size:24px;cursor:pointer}

/* ===== Hero ===== */
.hero{position:relative;padding:140px 0 80px;overflow:hidden}
.hero:after{content:"";position:absolute;right:-10%;top:-10%;width:520px;height:520px;
  background:radial-gradient(circle,rgba(184,135,90,.16),transparent 70%);z-index:0}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:54px;align-items:center;position:relative;z-index:1}
.hero h1{font-size:46px;line-height:1.16;font-weight:800;letter-spacing:.01em;margin:14px 0 18px}
.hero h1 .g{color:var(--gold)}
.hero p.lead{font-size:17px;color:var(--ink-2);max-width:480px}
.hero-actions{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 26px;border-radius:999px;font-weight:600;font-size:15px;transition:.2s;cursor:pointer;border:1px solid transparent}
.btn-solid{background:var(--gold);color:#fff}
.btn-solid:hover{background:var(--gold-d)}
.btn-ghost{border-color:var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--ink)}

/* 视频卡 */
.video-card{position:relative;border-radius:18px;overflow:hidden;box-shadow:0 26px 60px -28px rgba(23,19,13,.5);aspect-ratio:16/10;background:#0e0b07}
.video-card img{width:100%;height:100%;object-fit:cover;opacity:.92}
.video-card .play{position:absolute;inset:0;display:grid;place-items:center;cursor:pointer;
  background:linear-gradient(180deg,rgba(14,11,7,.05),rgba(14,11,7,.55))}
.video-card .play span{width:74px;height:74px;border-radius:50%;background:rgba(255,255,255,.92);
  display:grid;place-items:center;box-shadow:0 10px 30px rgba(0,0,0,.35);transition:.25s}
.video-card .play:hover span{transform:scale(1.08)}
.video-card .play svg{width:26px;height:26px;fill:var(--ink);margin-left:4px}
.video-card .tag{position:absolute;left:16px;bottom:14px;color:#fff;font-size:13px;letter-spacing:.04em;
  background:rgba(23,19,13,.5);padding:5px 12px;border-radius:999px;backdrop-filter:blur(4px)}

/* 视频弹窗 */
.modal{position:fixed;inset:0;background:rgba(10,8,5,.92);z-index:200;display:none;place-items:center;padding:24px}
.modal.open{display:grid}
.modal video{max-width:92vw;max-height:86vh;border-radius:12px;box-shadow:0 30px 80px rgba(0,0,0,.6)}
.modal .close{position:absolute;top:22px;right:26px;color:#fff;font-size:34px;cursor:pointer;line-height:1}

/* ===== 资质 ===== */
.creds{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.cred{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:26px 22px;transition:.25s}
.cred:hover{transform:translateY(-5px);box-shadow:0 20px 40px -26px rgba(23,19,13,.4);border-color:var(--gold)}
.cred .ico{width:46px;height:46px;border-radius:11px;background:rgba(184,135,90,.12);display:grid;place-items:center;color:var(--gold);margin-bottom:16px}
.cred h4{margin:0 0 6px;font-size:16px}
.cred p{margin:0;color:var(--muted);font-size:13.5px}

/* ===== 服务 ===== */
.svc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}
.svc{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:30px 24px;transition:.25s}
.svc:hover{border-color:var(--gold);transform:translateY(-5px)}
.svc .num{font-size:13px;color:var(--gold);font-weight:700;letter-spacing:.2em}
.svc h4{margin:12px 0 8px;font-size:18px}
.svc p{margin:0;color:var(--muted);font-size:14px}
.feature{margin-top:22px;background:var(--dark);color:#efe9e0;border-radius:18px;padding:42px;display:grid;grid-template-columns:1.1fr 1fr;gap:34px;align-items:center}
.feature h3{font-size:26px;margin:6px 0 12px;color:#fff}
.feature p{color:#c4b9aa;margin:0 0 18px}
.feature ul{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:12px}
.feature li{display:flex;align-items:center;gap:9px;font-size:14.5px;color:#e7ddcf}
.feature li:before{content:"";width:7px;height:7px;border-radius:50%;background:var(--gold);flex:none}

/* ===== 案例 ===== */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.case{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;transition:.25s}
.case:hover{transform:translateY(-6px);box-shadow:0 24px 48px -30px rgba(23,19,13,.5)}
.case .thumb{aspect-ratio:16/10;display:grid;place-items:center;color:#fff;font-weight:700;font-size:15px;letter-spacing:.05em;text-align:center;padding:18px;background:linear-gradient(135deg,#1c1710,#3a2c1d)}
.case .thumb.g1{background:linear-gradient(135deg,#1c1710,#4a341e)}
.case .thumb.g2{background:linear-gradient(135deg,#241a12,#5a3a22)}
.case .thumb.g3{background:linear-gradient(135deg,#1d1812,#3e3320)}
.case .thumb.g4{background:linear-gradient(135deg,#221912,#553a1f)}
.case .thumb.g5{background:linear-gradient(135deg,#1a1611,#46301d)}
.case .thumb.g6{background:linear-gradient(135deg,#20170f,#5e3f22)}
.case .body{padding:18px 20px}
.case .body h4{margin:0 0 6px;font-size:16px}
.case .body p{margin:0;color:var(--muted);font-size:13.5px}

/* ===== 资讯 ===== */
.news-list{display:grid;gap:14px}
.news{display:flex;gap:18px;align-items:flex-start;padding:20px 0;border-bottom:1px solid var(--line)}
.news .d{flex:none;width:64px;text-align:center}
.news .d b{display:block;font-size:26px;color:var(--ink);line-height:1}
.news .d span{font-size:12px;color:var(--muted)}
.news h4{margin:0 0 6px;font-size:16.5px}
.news p{margin:0;color:var(--muted);font-size:14px}
.news .tag{font-size:11px;color:var(--gold);border:1px solid var(--gold);padding:2px 8px;border-radius:999px;margin-left:8px}

/* ===== CTA band ===== */
.cta-band{background:var(--gold);color:#fff;text-align:center;padding:64px 22px}
.cta-band h2{font-size:30px;margin:0 0 12px}
.cta-band p{margin:0 0 26px;opacity:.92}
.cta-band .btn-light{background:#fff;color:var(--ink)}

/* ===== 页脚 ===== */
.footer{background:var(--dark);color:#cfc5b6;padding:60px 0 30px}
.footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:34px}
.footer h5{color:#fff;font-size:16px;margin:0 0 16px}
.footer ul{list-style:none;margin:0;padding:0;line-height:2.1;font-size:14px}
.footer a:hover{color:var(--gold)}
.footer .copy{border-top:1px solid rgba(255,255,255,.1);margin-top:36px;padding-top:20px;font-size:13px;color:#8d8377;text-align:center}

/* ===== 通用页面 ===== */
.page-head{padding:130px 0 40px;background:var(--paper);border-bottom:1px solid var(--line)}
.page-head h1{font-size:34px;margin:8px 0 6px;font-weight:800}
.page-head .crumb{font-size:13px;color:var(--muted)}
.page-body{padding:60px 0}
.card-list{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:26px;transition:.2s}
.card:hover{border-color:var(--gold);transform:translateY(-4px)}
.card h4{margin:0 0 8px;font-size:17px}
.card p{margin:0;color:var(--muted);font-size:14px}
.prose{max-width:760px;font-size:16px;color:var(--ink-2)}
.prose p{margin:0 0 18px}

/* 表单 */
.form-box{max-width:560px;margin:0 auto;background:var(--paper);border:1px solid var(--line);border-radius:var(--r);padding:30px}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;margin-bottom:6px;color:var(--ink-2);font-weight:600}
.field input,.field textarea{width:100%;padding:11px 13px;border:1px solid var(--line);border-radius:10px;font:inherit;background:var(--cream)}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--gold)}
.codeimg{height:38px;cursor:pointer;border-radius:8px;border:1px solid var(--line)}

/* 动画 */
.reveal{opacity:0;transform:translateY(22px);transition:.7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}

/* ===== 响应式 ===== */
@media(max-width:1180px){
  .nav ul{gap:13px;font-size:13px}
  .lang-switch{display:none}
}
@media(max-width:980px){
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .hero h1{font-size:36px}
  .creds,.svc-grid{grid-template-columns:repeat(2,1fr)}
  .case-grid,.card-list{grid-template-columns:repeat(2,1fr)}
  .feature{grid-template-columns:1fr;padding:30px}
  .footer .cols{grid-template-columns:1fr 1fr}
}
@media(max-width:620px){
  .nav ul{display:none;position:absolute;top:100%;right:0;background:var(--cream);flex-direction:column;
    padding:18px 24px;box-shadow:0 20px 40px -20px rgba(0,0,0,.3);border-radius:0 0 0 14px;gap:14px}
  .nav ul.show{display:flex}
  .nav-toggle{display:block}
  .hero h1{font-size:30px}
  .creds,.svc-grid,.case-grid,.card-list,.feature ul{grid-template-columns:1fr}
  .section{padding:60px 0}
}