/* ============================================================
   时尺智造 · 离散制造数智化解决方案官网
   设计系统 v2.0 — 基于 LINGSER-WEB-2026-001 标准
   品牌色：深海军蓝 #0F2B4D
   ============================================================ */

/* ---------- 设计令牌 ---------- */
:root{
  /* 品牌色 */
  --brand-deep:#0F2B4D;      /* 主品牌色 · 深海军蓝 */
  --brand:#1A4070;           /* 品牌蓝 */
  --brand-light:#3A7CA5;     /* 辅助蓝 */
  --brand-bright:#5BA3D0;   /* 高亮蓝 */
  --ink:#061829;             /* 近黑海军蓝 */
  --ink-2:#0A2339;
  --ink-3:#152D4A;

  /* 暖色强调（CTA / 琥珀） */
  --amber:#E89A2B;
  --amber-deep:#B9761E;
  --amber-bright:#F5B544;

  /* 中性 */
  --paper:#F5F7FA;
  --paper-2:#EDF1F6;
  --paper-3:#E0E6EE;
  --line:rgba(15,43,77,.10);
  --line-strong:rgba(15,43,77,.16);
  --text-900:#0F1B2A;
  --text-700:#3D4F61;
  --text-500:#6B7B8E;
  --text-300:#9BA8B8;

  /* 浅色页面上的 on-dark 文本 */
  --on-dark-100:#EEF3F8;
  --on-dark-300:#A4B8CC;
  --on-dark-500:#6E8499;

  /* 阴影 */
  --shadow-card:0 1px 3px rgba(15,43,77,.06),0 6px 24px rgba(15,43,77,.05);
  --shadow-pop:0 8px 30px rgba(15,43,77,.12),0 2px 8px rgba(15,43,77,.08);

  /* 字体 */
  --font-sans:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",sans-serif;
  --font-mono:"SF Mono",Menlo,Consolas,"Liberation Mono",monospace;

  /* 圆角 */
  --r-sm:4px;--r-md:8px;--r-lg:16px;--r-xl:24px;

  /* 间距 */
  --gutter:clamp(20px,4vw,48px);
  --section-py:clamp(56px,8vw,100px);
  --container:1200px;
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font-sans);font-size:16px;line-height:1.7;color:var(--text-900);background:var(--paper);overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none;transition:color .15s ease}
a:hover{color:var(--brand-light)}
button{font:inherit;cursor:pointer;border:none;background:none;color:inherit}
ul,ol{list-style-position:inside}
:focus-visible{outline:2px solid var(--amber);outline-offset:2px;border-radius:2px}

/* ---------- 容器 ---------- */
.container{max-width:var(--container);margin:0 auto;padding:0 var(--gutter)}
.container-wide{max-width:1360px;margin:0 auto;padding:0 var(--gutter)}
.container-narrow{max-width:800px;margin:0 auto;padding:0 var(--gutter)}

/* ---------- 排版 ---------- */
h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.25;letter-spacing:-.01em}
h1{font-size:clamp(28px,4.5vw,48px)}
h2{font-size:clamp(24px,3.5vw,36px)}
h3{font-size:clamp(18px,2.2vw,24px)}
h4{font-size:clamp(16px,1.6vw,20px)}
p{line-height:1.75}
.lead{font-size:clamp(16px,1.6vw,20px);line-height:1.6;color:var(--text-700)}
.small{font-size:13px;color:var(--text-500)}
.mono{font-family:var(--font-mono)}
.sec-label{font-family:var(--font-mono);font-size:12px;letter-spacing:.18em;text-transform:uppercase;color:var(--brand-light);margin-bottom:12px}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:11px 22px;border-radius:var(--r-sm);font-size:15px;font-weight:500;transition:all .2s ease;white-space:nowrap;min-height:44px}
.btn-primary{background:var(--amber);color:#fff}
.btn-primary:hover{background:var(--amber-deep);color:#fff;box-shadow:0 4px 14px rgba(232,154,43,.35)}
.btn-ghost{border:1.5px solid rgba(255,255,255,.3);color:#fff}
.btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.08);color:#fff}
.btn-outline{border:1.5px solid var(--line-strong);color:var(--text-900)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand)}
.arr{transition:transform .2s ease}
.btn:hover .arr{transform:translateX(3px)}

/* ---------- 通用区块 ---------- */
section{padding:var(--section-py) 0}
.sec-dark{background:var(--ink);color:var(--on-dark-100)}
.sec-dark h2,.sec-dark h3{color:#fff}
.sec-paper{background:var(--paper)}
.sec-white{background:#fff}

.section-head{max-width:680px;margin-bottom:clamp(32px,4vw,52px)}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}

/* ---------- 通用导航 ---------- */
.site-header{position:fixed;top:0;left:0;right:0;z-index:100;transition:background .25s ease,box-shadow .25s ease}
.site-header.scrolled{background:rgba(255,255,255,.95);backdrop-filter:blur(12px);box-shadow:0 1px 0 var(--line),0 4px 20px rgba(15,43,77,.04)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:64px;max-width:var(--container);margin:0 auto;padding:0 var(--gutter)}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:#fff}
.logo img{height:36px;width:auto}
.logo .logo-mark{width:26px;height:26px;flex:none}
.site-header.scrolled .logo{color:var(--text-900)}
.logo-text{font-size:18px;font-weight:600;color:#fff;letter-spacing:-.01em}
.site-header.scrolled .logo-text{color:var(--text-900)}
.nav-list{display:flex;align-items:center;gap:4px;list-style:none}
.nav-list a{display:block;padding:8px 11px;font-size:14px;color:rgba(255,255,255,.75);border-radius:var(--r-sm);transition:color .15s ease,background .15s ease}
.nav-list a:hover{color:#fff;background:rgba(255,255,255,.08)}
.site-header.scrolled .nav-list a{color:var(--text-700)}
.site-header.scrolled .nav-list a:hover{color:var(--brand);background:var(--paper-2)}
.nav-cta{margin-left:8px}
.nav-toggle{display:none;width:40px;height:40px;align-items:center;justify-content:center;border-radius:var(--r-sm)}
.nav-toggle svg{width:22px;height:22px}
.site-header.scrolled .nav-toggle{color:var(--text-900)}
.nav-toggle{color:#fff}

@media(max-width:1024px){
  .nav-toggle{display:flex}
  .nav-list{position:fixed;top:64px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:#fff;box-shadow:0 8px 30px rgba(15,43,77,.12);padding:12px var(--gutter);max-height:0;overflow:hidden;transition:max-height .3s ease}
  .nav-list.open{max-height:400px}
  .nav-list a{color:var(--text-700);padding:12px 14px;border-radius:var(--r-sm)}
  .nav-list a:hover{background:var(--paper-2)}
  .nav-cta{margin:8px 0 0}
  .logo-text{color:var(--text-900)}
  .site-header:not(.scrolled) .logo-text{color:#fff}
}

/* ---------- Hero ---------- */
.hero{position:relative;min-height:100svh;display:flex;align-items:center;background:var(--ink);color:#fff;overflow:hidden;padding-top:64px}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse 80% 60% at 70% 30%,rgba(58,124,165,.25),transparent),radial-gradient(ellipse 60% 40% at 20% 80%,rgba(232,154,43,.08),transparent)}
.hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(91,163,208,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(91,163,208,.04) 1px,transparent 1px);background-size:48px 48px;mask-image:radial-gradient(ellipse 70% 80% at center,#000 30%,transparent 80%)}
.hero-inner{position:relative;z-index:1;display:grid;grid-template-columns:1fr;gap:40px;align-items:center;width:100%}
@media(min-width:900px){
  .hero-inner{grid-template-columns:1.1fr .9fr;gap:60px}
}
.hero-eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:var(--brand-bright);margin-bottom:20px}
.hero-eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--amber)}
.hero h1{font-size:clamp(32px,5vw,56px);line-height:1.15;margin-bottom:20px}
.hero h1 .hl{color:var(--amber-bright)}
.hero .lead{color:var(--on-dark-300);font-size:clamp(16px,1.8vw,19px);margin-bottom:32px;max-width:540px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.hero-note{font-size:13px;color:var(--on-dark-500);margin-top:18px}

/* Hero 右侧视觉 */
.hero-visual{position:relative}
.hero-visual .swoosh{position:absolute;top:-20%;right:-10%;width:140%;opacity:.06}
.hero-card{background:rgba(15,43,77,.5);border:1px solid rgba(91,163,208,.15);border-radius:var(--r-lg);padding:28px;backdrop-filter:blur(8px)}
.hero-card h3{font-size:14px;color:var(--brand-bright);margin-bottom:16px;letter-spacing:.05em}
.hero-card .stat-row{display:flex;justify-content:space-between;align-items:baseline;padding:10px 0;border-bottom:1px solid rgba(91,163,208,.1)}
.hero-card .stat-row:last-child{border-bottom:none}
.hero-card .stat-row .k{font-size:13px;color:var(--on-dark-300)}
.hero-card .stat-row .v{font-size:20px;font-weight:600;color:#fff;font-family:var(--font-mono)}

/* ---------- 行业入口卡片 ---------- */
.industry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
@media(max-width:900px){.industry-grid{grid-template-columns:1fr}}
.industry-card{display:block;padding:32px 28px;border-radius:var(--r-lg);background:#fff;border:1px solid var(--line);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease;text-decoration:none;color:inherit}
.industry-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-pop);border-color:var(--brand-light)}
.industry-card .num{font-family:var(--font-mono);font-size:13px;color:var(--text-300);margin-bottom:16px}
.industry-card h3{font-size:22px;margin-bottom:12px;color:var(--brand-deep)}
.industry-card p{font-size:14px;color:var(--text-500);line-height:1.65;margin-bottom:20px}
.industry-card .tags{display:flex;flex-wrap:wrap;gap:6px;margin-bottom:20px}
.industry-card .tag{font-size:12px;padding:4px 10px;border-radius:100px;background:var(--paper-2);color:var(--text-700)}
.industry-card .more{font-size:14px;color:var(--brand);display:inline-flex;align-items:center;gap:4px}
.industry-card:hover .more{color:var(--brand-light)}
.industry-card .more .arr{transition:transform .2s ease}
.industry-card:hover .more .arr{transform:translateX(4px)}

/* ---------- 功能/特性区块 ---------- */
.feature-grid{display:grid;gap:clamp(32px,4vw,48px)}
@media(min-width:700px){.feature-grid.two-col{grid-template-columns:1fr 1fr}}
@media(min-width:900px){.feature-grid.three-col{grid-template-columns:repeat(3,1fr)}}

.feature-item h3{font-size:18px;margin-bottom:10px;color:var(--brand-deep)}
.feature-item p{font-size:14px;color:var(--text-500);line-height:1.7}
.feature-item .icon{width:40px;height:40px;border-radius:var(--r-sm);display:flex;align-items:center;justify-content:center;margin-bottom:16px;color:var(--brand)}

/* ---------- 数据条 ---------- */
.stat-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(20px,3vw,40px)}
@media(max-width:700px){.stat-strip{grid-template-columns:repeat(2,1fr)}}
.stat-item{text-align:center}
.stat-item .num{font-size:clamp(28px,4vw,44px);font-weight:700;font-family:var(--font-mono);color:var(--amber-bright);line-height:1}
.stat-item .label{font-size:13px;color:var(--on-dark-500);margin-top:8px}
.stat-note{margin-top:24px;text-align:center;font-size:12px;color:var(--on-dark-500);line-height:1.7}
.hero-card-note{margin-top:14px;font-size:12px;color:var(--on-dark-500);line-height:1.6;border-top:1px solid rgba(91,163,208,.15);padding-top:12px}

/* ---------- 表格 ---------- */
.data-table{width:100%;border-collapse:collapse;font-size:14px}
.data-table th{text-align:left;padding:12px 16px;background:var(--paper-2);font-weight:600;color:var(--text-700);border-bottom:2px solid var(--line-strong)}
.data-table td{padding:12px 16px;border-bottom:1px solid var(--line)}
.data-table tr:hover td{background:var(--paper-2)}

/* ---------- FAQ ---------- */
.faq-list{display:grid;gap:12px;max-width:860px}
.faq-item{border:1px solid var(--line);border-radius:var(--r-md);overflow:hidden;background:#fff}
.faq-item summary{padding:18px 20px;font-size:16px;font-weight:500;cursor:pointer;display:flex;justify-content:space-between;align-items:center;list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:20px;color:var(--text-300);transition:transform .2s ease}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item .faq-a{padding:0 20px 18px;font-size:14px;color:var(--text-700);line-height:1.75}

/* ---------- CTA 区 ---------- */
.cta-section{background:var(--ink);color:#fff;text-align:center;padding:var(--section-py) 0}
.cta-section h2{color:#fff;margin-bottom:16px}
.cta-section p{color:var(--on-dark-300);max-width:520px;margin:0 auto 32px}

/* ---------- 表单 ---------- */
.form-grid{display:grid;gap:18px}
.form-row{display:grid;gap:16px}
@media(min-width:600px){.form-row.two{grid-template-columns:1fr 1fr}}
.form-field label{display:block;font-size:13px;font-weight:500;margin-bottom:6px;color:var(--text-700)}
.form-field input,.form-field textarea,.form-field select{width:100%;padding:10px 14px;font-size:15px;font-family:inherit;border:1px solid var(--line-strong);border-radius:var(--r-sm);transition:border-color .15s ease,box-shadow .15s ease;background:#fff}
.form-field input:focus,.form-field textarea:focus,.form-field select:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(58,124,165,.1);outline:none}
.form-field input.err{border-color:var(--amber)}
.form-success{text-align:center;padding:24px}
.form-success .big{font-size:20px;font-weight:600;margin-bottom:8px;color:var(--brand-deep)}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:var(--on-dark-300);padding:clamp(40px,6vw,64px) 0 24px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
@media(max-width:800px){.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:500px){.footer-grid{grid-template-columns:1fr}}
.footer-brand .logo{margin-bottom:16px}
.footer-brand .logo-text{color:#fff}
.footer-brand p{font-size:13px;line-height:1.7;color:var(--on-dark-500);max-width:320px}
.footer-col h4{font-size:14px;color:#fff;margin-bottom:16px;font-weight:500}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:8px}
.footer-col a{font-size:13px;color:var(--on-dark-300)}
.footer-col a:hover{color:#fff}
.footer-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px;padding-top:24px;border-top:1px solid rgba(255,255,255,.08);font-size:12px;color:var(--on-dark-500)}
.footer-bottom a{color:var(--on-dark-500)}
.footer-bottom a:hover{color:var(--on-dark-300)}

/* ---------- 入场动效 ---------- */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  *{animation:none !important;transition:none !important}
  html{scroll-behavior:auto}
}

/* ---------- 工具类 ---------- */
.text-center{text-align:center}
.mt-0{margin-top:0}.mt-1{margin-top:8px}.mt-2{margin-top:16px}.mt-3{margin-top:24px}.mt-4{margin-top:32px}
.mb-0{margin-bottom:0}.mb-1{margin-bottom:8px}.mb-2{margin-bottom:16px}.mb-3{margin-bottom:24px}.mb-4{margin-bottom:32px}
.d-none{display:none}
.bg-paper{background:var(--paper)}
.bg-white{background:#fff}
.bg-dark{background:var(--ink)}
.text-brand{color:var(--brand)}
.text-amber{color:var(--amber)}
.text-muted{color:var(--text-500)}
.rounded{border-radius:var(--r-md)}
.shadow{box-shadow:var(--shadow-card)}