/* =================================================================
   思淼cms · 思淼包装科技 — 前端设计系统
   版权人：思淼科技，联系人：王庆华，手机 13375692933，邮箱 461537149@qq.com
   本程序为商业软件，版权归版权人所有，受《著作权法》保护。禁止复制、禁止售卖、禁止未经授权的分发与修改。
   设计语言：洁净智造 · 精工互联（洁净蓝白基底 + 能量橙 / 可持续绿点缀）
   全部本地资源，无任何外链 CDN。
   ================================================================= */

:root {
  /* 品牌色 */
  --blue: #0072B0;
  --blue-2: #00A6E6;
  --blue-d: #054B73;
  --orange: #FF7A1A;
  --green: #2BB673;

  /* 中性 / 文本 */
  --ink: #0E2A3A;
  --text: #13283a;
  --text-soft: #5b7186;
  --text-faint: #8aa0ae;

  /* 背景 / 表面（浅色） */
  --bg: #ffffff;
  --bg-soft: #F4F8FB;
  --bg-tint: #EAF3FA;
  --surface: rgba(255, 255, 255, 0.72);
  --glass-bg: rgba(255, 255, 255, 0.55);
  --glass-border: rgba(255, 255, 255, 0.65);
  --border: rgba(8, 40, 64, 0.08);
  --border-strong: rgba(8, 40, 64, 0.14);

  /* 效果 */
  --shadow-sm: 0 6px 18px -10px rgba(8, 40, 64, 0.25);
  --shadow: 0 22px 55px -22px rgba(8, 40, 64, 0.28);
  --shadow-lg: 0 40px 90px -30px rgba(8, 40, 64, 0.4);
  --radius: 20px;
  --radius-sm: 12px;
  --radius-lg: 28px;
  --grad-brand: linear-gradient(120deg, var(--blue) 0%, var(--blue-2) 100%);
  --grad-energy: linear-gradient(120deg, var(--orange) 0%, #ff9d4d 100%);
  --grad-eco: linear-gradient(120deg, var(--green) 0%, #5fd6a0 100%);
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --maxw: 1240px;
  --header-h: 72px;
}

[data-theme="dark"] {
  --text: #e8f1f8;
  --text-soft: #9fb4c6;
  --text-faint: #6e8497;
  --bg: #0a1622;
  --bg-soft: #0e1d2e;
  --bg-tint: #112438;
  --surface: rgba(20, 40, 60, 0.6);
  --glass-bg: rgba(18, 38, 58, 0.55);
  --glass-border: rgba(255, 255, 255, 0.1);
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --shadow-sm: 0 6px 18px -10px rgba(0, 0, 0, 0.6);
  --shadow: 0 22px 55px -22px rgba(0, 0, 0, 0.7);
  --shadow-lg: 0 40px 90px -30px rgba(0, 0, 0, 0.8);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  transition: background-color .4s var(--ease), color .4s var(--ease);
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; }
.mono { font-family: "JetBrains Mono", "SFMono-Regular", Consolas, monospace; }
.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
section { position: relative; }
.section-pad { padding: 96px 0; }
.muted { color: var(--text-soft); }
.center { text-align: center; }

/* ---------- 背景装饰 ---------- */
.bg-aurora {
  position: absolute; inset: 0; overflow: hidden; z-index: 0; pointer-events: none;
}
.bg-aurora::before, .bg-aurora::after {
  content: ""; position: absolute; width: 60vw; height: 60vw; border-radius: 50%;
  filter: blur(80px); opacity: .35;
}
.bg-aurora::before { background: radial-gradient(circle, var(--blue-2), transparent 70%); top: -20vw; left: -10vw; }
.bg-aurora::after { background: radial-gradient(circle, var(--orange), transparent 70%); bottom: -25vw; right: -10vw; opacity:.18; }
[data-theme="dark"] .bg-aurora::before { opacity:.22; }
[data-theme="dark"] .bg-aurora::after { opacity:.12; }
.rel { position: relative; z-index: 1; }

/* ---------- 文字 / 标题 ---------- */
h1, h2, h3, h4 { color: var(--text); line-height: 1.2; font-weight: 800; letter-spacing: -0.02em; margin: 0 0 .5em; }
.eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-size: 13px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase;
  color: var(--blue); padding: 6px 14px; border-radius: 999px;
  background: var(--bg-tint); border: 1px solid var(--border);
}
.eyebrow .dot { width: 7px; height: 7px; border-radius: 50%; background: var(--orange); box-shadow: 0 0 0 4px rgba(255,122,26,.18); }
.gradient-text {
  background: var(--grad-brand); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.display { font-size: clamp(34px, 5.4vw, 64px); }
.h2 { font-size: clamp(26px, 3.4vw, 40px); }
.lead { font-size: clamp(16px, 1.4vw, 19px); color: var(--text-soft); max-width: 60ch; }

/* ---------- 玻璃卡片 ---------- */
.glass {
  background: var(--glass-bg);
  -webkit-backdrop-filter: blur(26px) saturate(180%);
  backdrop-filter: blur(26px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  transition: transform .45s var(--ease), box-shadow .45s var(--ease), border-color .3s;
}
.card:hover { transform: translateY(-6px); box-shadow: var(--shadow); border-color: var(--border-strong); }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 9px;
  padding: 13px 26px; border-radius: 999px; font-weight: 700; font-size: 15px;
  border: 1px solid transparent; transition: transform .3s var(--ease), box-shadow .3s, background .3s, color .3s;
  will-change: transform;
}
.btn-primary { background: var(--grad-brand); color: #fff; box-shadow: 0 12px 30px -12px rgba(0,114,176,.6); }
.btn-primary:hover { transform: translateY(-2px) scale(1.02); box-shadow: 0 20px 40px -14px rgba(0,114,176,.7); }
.btn-energy { background: var(--grad-energy); color: #fff; box-shadow: 0 12px 30px -12px rgba(255,122,26,.6); }
.btn-energy:hover { transform: translateY(-2px) scale(1.02); }
.btn-ghost { background: transparent; color: var(--text); border-color: var(--border-strong); }
.btn-ghost:hover { background: var(--bg-tint); transform: translateY(-2px); }
.btn-sm { padding: 9px 18px; font-size: 14px; }
.magnetic { transition: transform .25s var(--ease); }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; height: var(--header-h); z-index: 100;
  display: flex; align-items: center;
  background: color-mix(in srgb, var(--bg) 72%, transparent);
  -webkit-backdrop-filter: blur(18px); backdrop-filter: blur(18px);
  border-bottom: 1px solid var(--border);
  transition: background .3s, box-shadow .3s;
}
.site-header.scrolled { box-shadow: var(--shadow-sm); }
.nav { display: flex; align-items: center; justify-content: space-between; width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }
.brand { display: flex; align-items: center; gap: 11px; font-weight: 800; font-size: 19px; letter-spacing: -.02em; }
.brand .mark { width: 38px; height: 38px; border-radius: 11px; background: var(--grad-brand); display: grid; place-items: center; color: #fff; font-weight: 800; box-shadow: 0 8px 20px -8px rgba(0,114,176,.7); }
.brand .mark span { font-size: 17px; }
.nav-links { display: flex; align-items: center; gap: 4px; }
.nav-links a { padding: 9px 15px; border-radius: 10px; font-size: 15px; font-weight: 600; color: var(--text-soft); transition: color .25s, background .25s; }
.nav-links a:hover, .nav-links a.active { color: var(--text); background: var(--bg-tint); }
.nav-actions { display: flex; align-items: center; gap: 10px; }
.theme-toggle {
  width: 42px; height: 42px; border-radius: 12px; display: grid; place-items: center;
  background: var(--bg-tint); border: 1px solid var(--border); color: var(--text); transition: transform .3s var(--ease), background .3s;
}
.theme-toggle:hover { transform: rotate(18deg); }
.burger { display: none; width: 42px; height: 42px; border-radius: 12px; background: var(--bg-tint); border: 1px solid var(--border); }

/* ---------- Hero 双引擎 ---------- */
.hero { padding: calc(var(--header-h) + 70px) 0 90px; }
.hero-grid { display: grid; grid-template-columns: 1.05fr .95fr; gap: 40px; align-items: center; }
.hero h1 { margin-bottom: 18px; }
.hero .lead { margin-bottom: 30px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; }
.engine-wrap { display: grid; gap: 18px; }
.engine {
  position: relative; padding: 26px; border-radius: var(--radius-lg); overflow: hidden;
  background: var(--glass-bg); border: 1px solid var(--glass-border);
  -webkit-backdrop-filter: blur(24px); backdrop-filter: blur(24px);
  box-shadow: var(--shadow); transition: transform .5s var(--ease), box-shadow .5s var(--ease);
}
.engine::after { content:""; position:absolute; inset:0; background: linear-gradient(120deg, transparent 40%, rgba(255,255,255,.18)); opacity:0; transition: opacity .5s; }
.engine:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.engine:hover::after { opacity: 1; }
.engine .tag { display:inline-flex; align-items:center; gap:7px; font-size:12px; font-weight:700; letter-spacing:.1em; text-transform:uppercase; padding:5px 12px; border-radius:999px; }
.engine.material .tag { color: var(--blue); background: rgba(0,114,176,.12); }
.engine.equipment .tag { color: var(--orange); background: rgba(255,122,26,.14); }
.engine h3 { font-size: 24px; margin: 14px 0 6px; }
.engine p { color: var(--text-soft); font-size: 14.5px; margin: 0 0 16px; }
.engine .mini { display:flex; flex-wrap:wrap; gap:8px; margin-bottom:16px; }
.engine .chip { font-size:12.5px; padding:5px 11px; border-radius:999px; background: var(--bg-tint); border:1px solid var(--border); color: var(--text-soft); }
.engine .arrow { font-weight:700; }
.engine.material { border-top: 3px solid var(--blue); }
.engine.equipment { border-top: 3px solid var(--orange); }

/* ---------- 工序筛选 ---------- */
.process-bar { display:flex; flex-wrap:wrap; gap:10px; justify-content:center; margin-top: 8px; }
.process-step {
  display:flex; align-items:center; gap:10px; padding:12px 18px; border-radius:14px;
  background: var(--surface); border:1px solid var(--border); box-shadow: var(--shadow-sm);
  transition: transform .3s var(--ease), border-color .3s, background .3s; cursor:pointer;
}
.process-step:hover, .process-step.active { transform: translateY(-3px); border-color: var(--blue); background: var(--bg-tint); }
.process-step .num { width:26px; height:26px; border-radius:8px; background:var(--grad-brand); color:#fff; display:grid; place-items:center; font-size:13px; font-weight:800; }
.process-step .num.eq { background:var(--grad-energy); }
.process-step b { font-size:14.5px; }
.process-step small { display:block; color:var(--text-faint); font-size:12px; }

/* ---------- 区块头 ---------- */
.sec-head { max-width: 720px; margin-bottom: 44px; }
.sec-head.center { margin-left:auto; margin-right:auto; text-align:center; }
.sec-head .eyebrow { margin-bottom: 16px; }

/* ---------- 产品网格 ---------- */
.tabs { display:flex; gap:8px; flex-wrap:wrap; margin-bottom: 32px; }
.tab {
  padding: 10px 20px; border-radius: 999px; font-weight: 700; font-size: 14.5px;
  background: var(--surface); border: 1px solid var(--border); color: var(--text-soft);
  transition: all .3s var(--ease);
}
.tab.active { background: var(--grad-brand); color:#fff; border-color: transparent; box-shadow: 0 10px 24px -12px rgba(0,114,176,.6); }
.tab:hover:not(.active) { color: var(--text); border-color: var(--border-strong); }

.grid { display:grid; gap: 24px; }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }

.product {
  overflow: hidden; display:flex; flex-direction:column;
}
.product .thumb { position: relative; aspect-ratio: 4/3; overflow:hidden; background: var(--bg-tint); }
.product .thumb img { width:100%; height:100%; object-fit: cover; transition: transform .6s var(--ease); }
.product:hover .thumb img { transform: scale(1.06); }
.product .kind-badge {
  position:absolute; top:12px; left:12px; font-size:11.5px; font-weight:700; letter-spacing:.06em;
  padding:4px 11px; border-radius:999px; color:#fff;
}
.product .kind-badge.material { background: rgba(0,114,176,.92); }
.product .kind-badge.equipment { background: rgba(255,122,26,.92); }
.product .body { padding: 18px 20px 22px; display:flex; flex-direction:column; gap:10px; flex:1; }
.product .sku { font-size:12px; color: var(--text-faint); letter-spacing:.04em; }
.product h4 { font-size:18px; margin:0; }
.product .tags { display:flex; flex-wrap:wrap; gap:6px; }
.product .tagmini { font-size:11.5px; padding:3px 9px; border-radius:999px; background: var(--bg-tint); color: var(--text-soft); border:1px solid var(--border); }
.product .foot { margin-top:auto; display:flex; align-items:center; justify-content:space-between; padding-top: 12px; border-top:1px solid var(--border); }
.product .price { font-weight:800; color: var(--blue); }
.product .more { font-size:13.5px; font-weight:700; color: var(--text-soft); }

/* ---------- 行业方案 ---------- */
.industry { padding: 22px; display:flex; flex-direction:column; gap:14px; }
.industry .ico { width:54px; height:54px; border-radius:14px; display:grid; place-items:center; font-size:24px; background: var(--bg-tint); border:1px solid var(--border); }
.industry h4 { margin:0; font-size:20px; }
.industry .pains { font-size:13.5px; color: var(--text-soft); }
.industry .rec { display:grid; gap:8px; margin-top:4px; }
.industry .rec .row { font-size:13.5px; display:flex; gap:8px; align-items:flex-start; }
.industry .rec .row .k { font-weight:700; color: var(--text); min-width:42px; }
.industry .case { font-size:13px; color: var(--green); font-weight:600; }

/* ---------- 技术实力 ---------- */
.stat-grid { display:grid; grid-template-columns: repeat(4,1fr); gap:22px; }
.stat { padding: 28px; text-align:left; }
.stat .num { font-size: 40px; font-weight: 800; background: var(--grad-brand); -webkit-background-clip:text; background-clip:text; -webkit-text-fill-color:transparent; }
.stat .lbl { color: var(--text-soft); font-size: 14.5px; margin-top: 4px; }

/* ---------- 客户墙 ---------- */
.clients { display:grid; grid-template-columns: repeat(6,1fr); gap: 16px; }
.client {
  height: 78px; border-radius: 14px; display:grid; place-items:center; font-weight:800; font-size:15px;
  color: var(--text-soft); background: var(--surface); border:1px solid var(--border);
  transition: transform .35s var(--ease), color .35s, border-color .35s; letter-spacing:.02em;
}
.client:hover { transform: translateY(-4px); color: var(--blue); border-color: var(--blue); }

/* ---------- 资讯 ---------- */
.news { overflow:hidden; display:flex; flex-direction:column; }
.news .thumb { aspect-ratio: 16/9; overflow:hidden; background: var(--bg-tint); }
.news .thumb img { width:100%; height:100%; object-fit:cover; transition: transform .6s var(--ease); }
.news:hover .thumb img { transform: scale(1.05); }
.news .body { padding: 18px 20px 22px; display:flex; flex-direction:column; gap:9px; }
.news .cat { font-size:12px; font-weight:700; color: var(--green); text-transform:uppercase; letter-spacing:.08em; }
.news h4 { font-size:17.5px; margin:0; }
.news p { font-size:13.5px; color: var(--text-soft); margin:0; }
.news .date { font-size:12.5px; color: var(--text-faint); margin-top:auto; }

/* ---------- CTA / Footer 转化区 ---------- */
.cta {
  padding: 60px; border-radius: var(--radius-lg); text-align:center; position:relative; overflow:hidden;
  background: var(--grad-brand); color:#fff;
}
.cta::before { content:""; position:absolute; inset:0; background: radial-gradient(circle at 80% -20%, rgba(255,255,255,.25), transparent 60%); }
.cta h2 { color:#fff; }
.cta p { color: rgba(255,255,255,.9); max-width: 56ch; margin: 0 auto 26px; }
.cta .btns { display:flex; gap:14px; justify-content:center; flex-wrap:wrap; position:relative; }
.cta .btn-ghost { color:#fff; border-color: rgba(255,255,255,.5); }
.cta .btn-ghost:hover { background: rgba(255,255,255,.15); }

.site-footer { background: var(--bg-soft); border-top: 1px solid var(--border); padding: 64px 0 28px; }
.footer-grid { display:grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 36px; }
.footer-grid h5 { font-size:15px; margin: 0 0 16px; }
.footer-grid a, .footer-grid p { color: var(--text-soft); font-size:14px; display:block; margin: 0 0 10px; transition: color .25s; }
.footer-grid a:hover { color: var(--blue); }
.footer-contact .line { display:flex; gap:10px; align-items:center; margin-bottom: 10px; font-size:14px; color: var(--text-soft); }
.footer-bottom { margin-top: 44px; padding-top: 22px; border-top: 1px solid var(--border); display:flex; justify-content:space-between; flex-wrap:wrap; gap:12px; font-size:13px; color: var(--text-faint); }

/* ---------- 滚动揭示动画 ---------- */
.reveal { opacity: 0; transform: translateY(26px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) { .reveal { opacity:1; transform:none; transition:none; } }

/* ---------- 表单 ---------- */
.field { margin-bottom: 16px; }
.field label { display:block; font-size:13.5px; font-weight:600; margin-bottom:7px; color: var(--text-soft); }
.field input, .field textarea, .field select {
  width:100%; padding: 12px 15px; border-radius: var(--radius-sm); border:1px solid var(--border-strong);
  background: var(--bg); color: var(--text); font-size:15px; transition: border-color .25s, box-shadow .25s;
}
.field input:focus, .field textarea:focus, .field select:focus { outline:none; border-color: var(--blue); box-shadow: 0 0 0 4px rgba(0,114,176,.14); }
.field textarea { min-height: 110px; resize: vertical; }

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .hero-grid { grid-template-columns: 1fr; }
  .grid-3, .grid-4 { grid-template-columns: repeat(2,1fr); }
  .stat-grid { grid-template-columns: repeat(2,1fr); }
  .clients { grid-template-columns: repeat(4,1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .nav-links { display:none; }
  .burger { display:grid; place-items:center; }
  .mobile-menu { display:flex; }
  .section-pad { padding: 64px 0; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .clients { grid-template-columns: repeat(3,1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .cta { padding: 40px 24px; }
  .container { padding: 0 18px; }
}
.mobile-menu {
  display:none; position: fixed; top: var(--header-h); left:0; right:0; z-index: 99;
  flex-direction: column; gap: 4px; padding: 16px 18px;
  background: var(--bg); border-bottom: 1px solid var(--border); box-shadow: var(--shadow);
}
.mobile-menu a { padding: 13px 14px; border-radius: 10px; font-weight: 600; }
.mobile-menu a:hover { background: var(--bg-tint); }