/* 砺岩数字科技 - 共享样式 */
:root{
  --paper:#f6f2ea;--paper-2:#efe9de;--ink:#232c38;--ink-soft:#4a5563;
  --ink-faint:#7a838f;--gold:#b08129;--gold-deep:#8a6318;--gold-soft:#d8b25e;
  --jade:#3f6b5e;--line:rgba(35,44,56,.12);--glass:rgba(255,255,255,.56);
  --glass-brd:rgba(255,255,255,.75);--shadow:0 24px 60px -24px rgba(40,50,70,.35);
  --serif:"Noto Serif SC",Songti SC,STSong,SimSun,serif;
  --sans:"Noto Sans SC",Microsoft YaHei,PingFang SC,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--sans);color:var(--ink);background:var(--paper);line-height:1.7;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
.wrap{width:min(1200px,90%);margin:0 auto}
.serif{font-family:var(--serif)}

/* Header */
header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(246,242,234,.82);backdrop-filter:blur(14px);box-shadow:0 1px 0 var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:72px}
.brand{display:flex;align-items:center;gap:12px}
.brand img{width:38px;height:38px;object-fit:contain}
.brand .bn{font-family:var(--serif);font-weight:700;font-size:19px;letter-spacing:.06em;line-height:1.1}
.brand .bn small{display:block;font-family:var(--sans);font-size:10px;font-weight:400;letter-spacing:.2em;color:var(--ink-faint)}
.menu{display:flex;align-items:center;gap:22px;list-style:none}
.menu a{font-size:14px;color:var(--ink-soft);position:relative;padding:6px 0;transition:color .3s}
.menu a::after{content:"";position:absolute;left:0;bottom:0;height:2px;width:0;background:var(--gold);transition:width .3s}
.menu a:hover,.menu a.active{color:var(--ink)}
.menu a:hover::after,.menu a.active::after{width:100%}
.nav-cta{font-size:14px;padding:9px 20px;border-radius:6px;background:var(--ink);color:#fff;transition:.3s}
.nav-cta:hover{background:var(--gold-deep)}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.burger span{width:24px;height:2px;background:var(--ink);transition:.3s}
.mobile-menu{position:fixed;top:72px;left:0;right:0;z-index:99;background:var(--paper);display:none;flex-direction:column;padding:20px 5%;box-shadow:0 8px 24px rgba(0,0,0,.08)}
.mobile-menu.open{display:flex}
.mobile-menu a{padding:12px 0;border-bottom:1px solid var(--line);font-size:15px}

/* Page Hero */
.page-hero{padding:160px 0 80px;background:linear-gradient(180deg,var(--paper) 0%,var(--paper-2) 100%);text-align:center;position:relative;overflow:hidden}
.page-hero video.ph-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center;opacity:.45;z-index:0}
.page-hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(246,242,234,.3) 0%,rgba(246,242,234,.6) 100%);z-index:0}
.page-hero .wrap{position:relative;z-index:1}
.page-hero .kicker{font-size:12px;letter-spacing:.4em;color:var(--gold);text-transform:uppercase;margin-bottom:16px}
.page-hero h1{font-family:var(--serif);font-size:42px;font-weight:700;letter-spacing:.04em;margin-bottom:16px}
.page-hero p{font-size:16px;color:var(--ink-soft);max-width:640px;margin:0 auto}

/* Sections */
section{padding:80px 0}
.sec-head{text-align:center;margin-bottom:50px}
.sec-kicker{font-size:12px;letter-spacing:.3em;color:var(--gold);margin-bottom:12px}
.sec-head h2{font-family:var(--serif);font-size:32px;font-weight:700;margin-bottom:12px}
.sec-head p{color:var(--ink-soft);max-width:560px;margin:0 auto}

/* Cards */
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.card{background:#fff;border:1px solid var(--line);border-radius:12px;padding:32px;transition:.3s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.card .num{font-size:13px;color:var(--gold);font-family:var(--serif);margin-bottom:12px}
.card h3{font-family:var(--serif);font-size:19px;margin-bottom:10px}
.card p{font-size:14px;color:var(--ink-soft)}
.card .tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.card .tags span{font-size:12px;padding:4px 10px;background:var(--paper-2);border-radius:20px;color:var(--ink-soft)}

/* 行业卡片头图（仅带 .card-media 的卡片生效） */
.card.card-media{overflow:hidden;padding:0 32px 32px}
.card-media .card-cover{margin:0 -32px 22px;aspect-ratio:16/9;overflow:hidden;background:var(--paper-2)}
.card-media .card-cover img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}
.card-media:hover .card-cover img{transform:scale(1.06)}
.card-media .num{margin-bottom:12px}

/* Footer */
footer{background:var(--ink);color:rgba(255,255,255,.7);padding:60px 0 30px;margin-top:0}
.f-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.f-grid h4{color:#fff;font-family:var(--serif);font-size:15px;margin-bottom:16px}
.f-grid a{display:block;font-size:13px;padding:4px 0;opacity:.75;transition:.3s}
.f-grid a:hover{opacity:1;color:var(--gold-soft)}
.f-brand{display:flex;align-items:center;gap:12px;margin-bottom:16px}
.f-brand img{width:36px;height:36px}
.f-brand span{font-family:var(--serif);font-size:18px;color:#fff}
.f-bottom{border-top:1px solid rgba(255,255,255,.1);padding-top:24px;font-size:12px;text-align:center;opacity:.5}

/* Buttons */
.btn{display:inline-block;padding:12px 28px;border-radius:6px;font-size:14px;transition:.3s;cursor:pointer;border:0}
.btn-primary{background:var(--gold);color:#fff}
.btn-primary:hover{background:var(--gold-deep)}
.btn-ghost{background:transparent;border:1px solid var(--line);color:var(--ink)}
.btn-ghost:hover{border-color:var(--gold);color:var(--gold)}

/* Responsive */
@media(max-width:1080px){.card-grid{grid-template-columns:repeat(2,1fr)}.f-grid{grid-template-columns:repeat(2,1fr)}}

/* 音乐开关悬浮按钮 */
.sound-toggle{
  position:fixed;right:22px;bottom:22px;z-index:160;
  width:46px;height:46px;border-radius:50%;
  border:1px solid var(--line);background:rgba(255,255,255,.6);
  backdrop-filter:blur(10px);cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  color:var(--ink-soft);transition:all .3s;
  box-shadow:0 4px 16px rgba(0,0,0,.12);
}
.sound-toggle:hover{color:var(--gold);border-color:var(--gold-soft)}
.sound-toggle.on{color:var(--gold);border-color:var(--gold-soft);background:rgba(216,178,94,.15)}
.sound-toggle svg{width:20px;height:20px}
.sound-toggle .waves{display:none}
.sound-toggle.on .waves{display:inline}
.sound-toggle.on .mute{display:none}

@media(max-width:860px){
  .menu,.nav .nav-cta{display:none}
  .burger{display:flex}
  .card-grid{grid-template-columns:1fr}
  .f-grid{grid-template-columns:1fr}
  .page-hero h1{font-size:30px}
  section{padding:60px 0}
}

/* 两侧动态人物装饰 */
.side-char{
  position:fixed;top:50%;transform:translateY(-50%);
  width:180px;z-index:1;pointer-events:none;
  opacity:.14;filter:grayscale(.3);
  animation:charFloat 6s ease-in-out infinite;
}
.side-char.left{left:20px}
.side-char.right{right:20px;transform:translateY(-50%) scaleX(-1);animation-delay:-3s}
.side-char img{width:100%;height:auto;object-fit:contain}
@keyframes charFloat{
  0%,100%{transform:translateY(-50%) translateY(0)}
  50%{transform:translateY(-50%) translateY(-12px)}
}
.side-char.right{animation-name:charFloatRight}
@keyframes charFloatRight{
  0%,100%{transform:translateY(-50%) scaleX(-1) translateY(0)}
  50%{transform:translateY(-50%) scaleX(-1) translateY(-12px)}
}
@media(max-width:1200px){.side-char{display:none}}

/* 详情页样式 */
.detail-hero{padding:160px 0 80px;background:linear-gradient(180deg,#1a1f2e 0%,#2a3040 100%);color:#fff;position:relative;overflow:hidden}
.detail-hero::before{content:"";position:absolute;inset:0;background:url('../assets/bg-landscape.jpg') center/cover;opacity:.2}
.detail-hero .wrap{position:relative;z-index:1}
.detail-hero .sec-kicker{color:var(--gold-soft);margin-bottom:16px}
.detail-hero h1{font-family:var(--serif);font-size:48px;font-weight:700;margin-bottom:20px;letter-spacing:.04em}
.detail-hero .sub{font-size:18px;color:rgba(255,255,255,.7);max-width:600px;line-height:1.8}

.detail-content{padding:60px 0 100px;background:var(--paper)}
.detail-grid{display:grid;grid-template-columns:1fr 340px;gap:50px}

.detail-main > *{margin-bottom:40px}
.detail-main h2{font-family:var(--serif);font-size:28px;color:var(--ink);margin-bottom:20px;padding-left:16px;border-left:4px solid var(--gold)}
.detail-main p{color:var(--ink-soft);font-size:15px;line-height:1.9}

.feature-list{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:20px 0}
.feature-item{background:#fff;padding:20px;border-radius:10px;box-shadow:0 2px 12px rgba(0,0,0,.06)}
.feature-item h4{font-size:15px;color:var(--ink);margin-bottom:8px;display:flex;align-items:center;gap:8px}
.feature-item h4::before{content:"◆";color:var(--gold);font-size:12px}
.feature-item p{font-size:13px;color:var(--ink-faint);margin:0;line-height:1.6}

.spec-table{width:100%;border-collapse:collapse;background:#fff;border-radius:10px;overflow:hidden;box-shadow:0 2px 12px rgba(0,0,0,.06)}
.spec-table th,.spec-table td{padding:14px 20px;text-align:left;border-bottom:1px solid var(--line);font-size:14px}
.spec-table th{background:rgba(176,129,41,.05);color:var(--ink);font-weight:500;width:140px}
.spec-table td{color:var(--ink-soft)}

.deliver-list{background:#fff;padding:24px;border-radius:10px;box-shadow:0 2px 12px rgba(0,0,0,.06)}
.deliver-list li{padding:10px 0;border-bottom:1px dashed var(--line);list-style:none;display:flex;align-items:center;gap:10px}
.deliver-list li:last-child{border-bottom:0}
.deliver-list li::before{content:"✓";color:var(--gold);font-weight:bold}

.tags{display:flex;flex-wrap:wrap;gap:10px;margin:16px 0}
.tags .tag{padding:8px 16px;border-radius:20px;background:rgba(176,129,41,.1);color:var(--gold-deep);font-size:13px}

.detail-side{position:sticky;top:100px;align-self:start}
.side-card{background:#fff;border-radius:14px;padding:28px;box-shadow:0 8px 30px rgba(0,0,0,.08);margin-bottom:20px}
.side-card h3{font-family:var(--serif);font-size:20px;margin-bottom:12px;color:var(--ink)}
.side-card p{font-size:14px;color:var(--ink-soft);margin-bottom:20px;line-height:1.7}
.side-card .btn{display:block;text-align:center;padding:14px;border-radius:8px;background:linear-gradient(135deg,var(--gold) 0%,var(--gold-deep) 100%);color:#fff;font-size:15px;font-weight:500;transition:.3s}
.side-card .btn:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(176,129,41,.3)}
.side-link{display:block;padding:10px 0;font-size:14px;color:var(--ink-soft);border-bottom:1px solid var(--line);transition:.3s}
.side-link:last-child{border-bottom:0}
.side-link:hover{color:var(--gold);padding-left:4px}

.detail-img{width:100%;border-radius:14px;box-shadow:0 12px 40px rgba(0,0,0,.15)}

@media(max-width:900px){
  .detail-grid{grid-template-columns:1fr}
  .detail-side{position:static}
  .detail-hero h1{font-size:32px}
  .feature-list{grid-template-columns:1fr}
}