/* ====== 山夕网络 — 淡金暖白 · 苹果级质感 ====== */

:root {
  --gold: #c8a45c;
  --gold-soft: #d4b46e;
  --gold-faint: #e8d5a0;
  --gold-bg: #faf6eb;
  --warm: #f9f5ed;
  --warm-deep: #f3eee0;
  --sand: #eae3d0;
  --sand-light: #f0eadd;
  --ink: #1a1206;
  --ink-soft: #3d2e1a;
  --ink-muted: #6b5a42;
  --ink-faint: #9c8b72;
  --border: #ddd4c0;
  --border-gold: rgba(200,164,92,0.22);
  --white: #ffffff;
  --green: #5a9c6c;
  --sky: #5ba4cf;
  --purple: #8b6cc8;

  --f: "PingFang SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --fm: "SF Mono","Fira Code",monospace;

  --r: 12px;
  --r-lg: 20px;

  --ease: cubic-bezier(.16,1,.3,1);
  --dur: .35s;
  --dur2: .6s;
}

*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:var(--f);font-size:15px;line-height:1.7;color:var(--ink);background:var(--warm);overflow-x:hidden}

.container{max-width:1120px;margin:0 auto;padding:0 32px}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}

/* ── 文字层级 ── */
.eyebrow{font-size:11px;font-family:var(--fm);color:var(--gold);letter-spacing:.18em;margin-bottom:8px}
.title-lg{font-size:clamp(1.8rem,4vw,2.8rem);font-weight:700;line-height:1.2;letter-spacing:-.02em;margin-bottom:12px}
.text-lead{font-size:15px;color:var(--ink-soft);line-height:1.8;margin-bottom:16px}
.text-body{font-size:14px;color:var(--ink-muted);line-height:1.8}
.text-sub{font-size:14px;color:var(--ink-muted);max-width:460px}
.pill{font-size:11px;font-weight:600;padding:4px 10px;border-radius:20px;background:var(--gold-bg);color:var(--gold-soft);border:1px solid var(--border-gold)}

/* ── 导航 ── */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;padding:16px 32px;display:flex;align-items:center;justify-content:space-between;transition:all var(--dur) var(--ease)}
.nav.scrolled{background:rgba(249,245,237,.88);backdrop-filter:blur(20px);box-shadow:0 1px 0 var(--border);padding:12px 32px}
.nav-logo{display:flex;align-items:center;gap:10px}
.nav-logo-icon{width:44px;height:44px;object-fit:contain}
.nav-logo-text{font-size:15px;font-weight:700}
.nav-links{display:flex;gap:28px}
.nav-links a{font-size:13px;font-weight:500;color:var(--ink-muted);transition:color var(--dur);position:relative}
.nav-links a:hover{color:var(--gold)}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;flex-direction:column;gap:5px;padding:8px}
.nav-toggle span{width:20px;height:2px;background:var(--ink);transition:all var(--dur) var(--ease)}
.nav-toggle.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.nav-toggle.active span:nth-child(2){opacity:0}
.nav-toggle.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}

/* ── 按钮 ── */
.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 24px;font-size:13px;font-weight:600;border-radius:8px;transition:all var(--dur) var(--ease)}
.btn-primary{background:var(--gold);color:var(--white);box-shadow:0 4px 16px rgba(200,164,92,.2)}
.btn-primary:hover{background:var(--gold-soft);transform:translateY(-2px);box-shadow:0 8px 24px rgba(200,164,92,.3)}
.btn-outline{background:rgba(255,255,255,.8);color:var(--ink-soft);border:1px solid var(--border);backdrop-filter:blur(8px)}
.btn-outline:hover{border-color:var(--gold-faint);background:var(--gold-bg)}

/* ── 英雄区 ── */
.hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;overflow:hidden}
.hero-video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.hero-overlay{position:absolute;inset:0;z-index:1;background:linear-gradient(180deg,rgba(249,245,237,.5) 0%,rgba(249,245,237,.65) 40%,rgba(249,245,237,.85) 100%);mix-blend-mode:normal}
.hero-content{position:relative;z-index:2;max-width:680px;padding:120px 32px 80px;text-align:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 16px;background:rgba(255,255,255,.7);border:1px solid var(--border-gold);border-radius:8px;backdrop-filter:blur(8px);margin-bottom:24px;opacity:0;animation:fadeUp .8s var(--ease) .2s forwards}
.badge-dot{width:6px;height:6px;border-radius:50%;background:var(--gold);animation:pulse 2s ease-in-out infinite}
.hero-badge span{font-size:12px;font-weight:600;color:var(--gold-soft)}
.hero-title{font-size:clamp(2.4rem,6vw,4.5rem);font-weight:800;line-height:1.08;letter-spacing:-.04em;margin-bottom:20px;opacity:0;animation:fadeUp .8s var(--ease) .4s forwards}
.hero-title em{font-style:normal;color:var(--gold)}
.hero-desc{font-size:15px;color:var(--ink-muted);line-height:1.7;max-width:440px;margin:0 auto 32px;opacity:0;animation:fadeUp .8s var(--ease) .6s forwards}
.hero-actions{display:flex;gap:12px;justify-content:center;opacity:0;animation:fadeUp .8s var(--ease) .8s forwards}
.hero-arrow{position:absolute;bottom:32px;left:50%;transform:translateX(-50%);z-index:2;color:var(--ink-muted);animation:bounceDown 2s ease-in-out infinite;opacity:0;animation:bounceDown 2s ease-in-out infinite,fadeUp .8s var(--ease) 1.2s forwards}

/* ── 关于 ── */
.about{padding:80px 0;background:var(--white)}
.about-grid{display:grid;grid-template-columns:1.4fr .6fr;gap:48px;align-items:start}
.about-metrics{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.metric-card{background:var(--warm);border:1px solid var(--border);border-radius:var(--r-lg);padding:24px;text-align:center;transition:all var(--dur) var(--ease)}
.metric-card:hover{transform:translateY(-4px);border-color:var(--border-gold);box-shadow:0 8px 24px rgba(200,164,92,.08)}
.metric-val{font-size:2.2rem;font-weight:800;color:var(--gold);line-height:1}
.metric-unit{font-size:.85rem;color:var(--ink-muted)}
.metric-label{font-size:12px;color:var(--ink-faint);margin-top:6px}

/* ── 服务能力 ── */
.capability{padding:80px 0;background:var(--warm)}
.cap-header{margin-bottom:48px}
.cap-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px}
.cap-card{background:var(--white);border:1px solid var(--border);border-radius:var(--r-lg);padding:28px;transition:all var(--dur2) var(--ease);position:relative}
.cap-card::after{content:'';position:absolute;bottom:0;left:24px;right:24px;height:3px;border-radius:2px;background:attr(data-color color,var(--gold));opacity:0;transition:opacity var(--dur) var(--ease)}
.cap-card[data-color="#5a9c6c"]::after{background:#5a9c6c}
.cap-card[data-color="#c8a45c"]::after{background:#c8a45c}
.cap-card[data-color="#5ba4cf"]::after{background:#5ba4cf}
.cap-card[data-color="#8b6cc8"]::after{background:#8b6cc8}
.cap-card:hover{transform:translateY(-6px);box-shadow:0 12px 32px rgba(26,18,6,.08);border-color:var(--border-gold)}
.cap-card:hover::after{opacity:1}
.cap-icon{color:var(--gold);margin-bottom:16px}
.cap-title{font-size:16px;font-weight:700;margin-bottom:8px}
.cap-desc{font-size:13px;color:var(--ink-muted);line-height:1.7;margin-bottom:16px}
.cap-tags{display:flex;gap:8px;flex-wrap:wrap}

/* ── 产品 ── */
.products{padding:80px 0;background:var(--white)}
.prod-header{margin-bottom:48px}
.prod-grid{display:flex;flex-direction:column;gap:16px}
.prod-card{display:flex;align-items:center;gap:24px;background:var(--warm);border:1px solid var(--border);border-radius:var(--r-lg);padding:24px 28px;transition:all var(--dur2) var(--ease);position:relative;overflow:hidden}
.prod-card::before{content:'';position:absolute;left:0;top:0;bottom:0;width:4px;background:attr(data-accent color,var(--gold));opacity:0;transition:opacity var(--dur)}
.prod-card[data-accent="#0ea5e9"]::before{background:#0ea5e9}
.prod-card[data-accent="#8b5cf6"]::before{background:#8b5cf6}
.prod-card[data-accent="#c8a45c"]::before{background:#c8a45c}
.prod-card[data-accent="#22c55e"]::before{background:#22c55e}
.prod-card[data-accent="#ef4444"]::before{background:#ef4444}
.prod-card:hover{transform:translateX(6px);box-shadow:0 8px 28px rgba(26,18,6,.07);border-color:var(--border-gold)}
.prod-card:hover::before{opacity:1}
.prod-logo-wrap{width:64px;height:64px;border-radius:var(--r);background:var(--white);box-shadow:0 2px 12px rgba(26,18,6,.05);overflow:hidden;flex-shrink:0}
.prod-logo-wrap img{width:100%;height:100%;object-fit:contain;padding:10px}
.prod-body{flex:1;min-width:0}
.prod-name{font-size:16px;font-weight:700;margin-bottom:6px;display:flex;align-items:baseline;gap:12px}
.prod-cat{font-size:11px;font-family:var(--fm);color:var(--gold);letter-spacing:.06em}
.prod-text{font-size:13px;color:var(--ink-muted);line-height:1.7;margin-bottom:8px}
.prod-arrow{font-size:13px;font-weight:600;color:var(--gold);display:inline-flex;align-items:center;gap:6px;transition:gap var(--dur) var(--ease)}
.prod-card:hover .prod-arrow{gap:10px}

/* ── 联系 ── */
.contact{padding:80px 0;background:var(--warm)}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.contact-items{display:flex;flex-direction:column;gap:20px;margin-top:24px}
.ci-row{display:flex;align-items:flex-start;gap:14px}
.ci-label{font-size:11px;color:var(--ink-faint);letter-spacing:.06em;display:block;margin-bottom:2px}
.ci-val{font-size:14px;font-weight:600;color:var(--ink)}
.map-card{background:var(--white);border:1px solid var(--border);border-radius:var(--r-lg);overflow:hidden;min-height:260px;box-shadow:0 4px 20px rgba(26,18,6,.05)}
.map-visual{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:260px;padding:32px;background:var(--gold-bg);background-image:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='%23c8a45c' fill-opacity='0.06'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E")}
.map-text{margin-top:12px;text-align:center}
.map-text strong{font-size:16px;font-weight:700;color:var(--ink);display:block}
.map-text span{font-size:12px;font-family:var(--fm);color:var(--gold);letter-spacing:.1em}

/* ── 页脚 ── */
.footer{background:var(--ink);color:var(--warm);padding:32px 0 24px}
.ft-top{display:flex;align-items:center;justify-content:space-between;padding-bottom:24px}
.ft-brand{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:700;color:var(--gold-faint)}
.ft-logo{width:36px;height:36px;object-fit:contain}
.ft-links{display:flex;gap:24px}
.ft-links a{font-size:13px;color:var(--ink-faint);transition:color var(--dur)}
.ft-links a:hover{color:var(--gold)}
.ft-divider{height:1px;background:rgba(249,245,237,.1);margin-bottom:16px}
.ft-bottom{display:flex;justify-content:space-between;font-size:11px;color:var(--ink-muted)}

/* ── 滚动揭示 ── */
.reveal{opacity:0;transform:translateY(20px);transition:opacity var(--dur2) var(--ease),transform var(--dur2) var(--ease)}
.reveal.visible{opacity:1;transform:translateY(0)}
.reveal-delay{transition-delay:.12s}
.reveal-delay-1{transition-delay:.08s}
.reveal-delay-2{transition-delay:.16s}
.reveal-delay-3{transition-delay:.24s}
.reveal-delay-4{transition-delay:.32s}

/* ── 关键帧 ── */
@keyframes fadeUp{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
@keyframes bounceDown{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(8px)}}

/* ── 响应式 ── */
@media(max-width:1024px){
  .about-grid{grid-template-columns:1fr}
  .about-metrics{grid-template-columns:repeat(4,1fr)}
  .contact-grid{grid-template-columns:1fr}
  .prod-card{gap:16px}
}
@media(max-width:768px){
  .nav-links{display:none;position:fixed;inset:0;background:rgba(249,245,237,.96);backdrop-filter:blur(16px);flex-direction:column;align-items:center;justify-content:center;gap:32px;z-index:99}
  .nav-links.open{display:flex}
  .nav-links a{font-size:18px}
  .nav-toggle{display:flex;z-index:101}
  .about-metrics{grid-template-columns:1fr 1fr}
  .cap-grid{grid-template-columns:1fr 1fr}
  .prod-card{flex-wrap:wrap}
  .prod-logo-wrap{width:48px;height:48px}
  .hero-arrow{display:none}
  .ft-top{flex-direction:column;gap:16px;text-align:center}
  .ft-links{flex-wrap:wrap;justify-content:center}
  .ft-bottom{flex-direction:column;text-align:center;gap:4px}
}
@media(max-width:480px){
  .cap-grid{grid-template-columns:1fr}
  .hero-actions{flex-direction:column}
  .btn{width:100%}
  .about-metrics{grid-template-columns:1fr 1fr}
}

::-webkit-scrollbar{width:5px}
::-webkit-scrollbar-track{background:var(--warm)}
::-webkit-scrollbar-thumb{background:var(--sand);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--gold-faint)}