:root{
  --blue:#0071e3;
  --blue-dk:#005bbd;
  --ink:#1d1d1f;
  --ink-2:#6e6e73;
  --line:rgba(0,0,0,.10);
  --bg:#ffffff;
  --bg-alt:#f5f5f7;
  --card:#ffffff;
  --radius:18px;
  --maxw:1040px;
  --nav-h:54px;
  font-family:-apple-system,BlinkMacSystemFont,"SF Pro SC","PingFang SC","Helvetica Neue","Microsoft YaHei",sans-serif;
}
[data-theme="dark"]{
  --blue:#3b82f6;
  --blue-dk:#2f6bff;
  --ink:#e8edf7;
  --ink-2:#9aa6bd;
  --line:rgba(255,255,255,.12);
  --bg:#0a0e1a;
  --bg-alt:#0d1322;
  --card:rgba(255,255,255,.04);
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);line-height:1.65;-webkit-font-smoothing:antialiased;overflow-x:hidden;transition:background .4s,color .4s}
a{color:inherit;text-decoration:none}
img{max-width:100%}

/* ===== 背景光晕（明暗两用）+ 网格（仅暗色） ===== */
.bg-orbs{position:fixed;inset:0;z-index:-1;overflow:hidden;display:block;pointer-events:none}
.orb{position:absolute;border-radius:50%;filter:blur(80px)}
/* 亮色（默认）：淡彩光晕，让毛玻璃有东西可透 */
.orb-1{width:520px;height:520px;background:#bcd4ff;top:-150px;left:-110px;opacity:.6}
.orb-2{width:580px;height:580px;background:#d9ccff;bottom:-210px;right:-150px;opacity:.55}
.orb-3{width:400px;height:400px;background:#b6ecff;top:38%;left:52%;opacity:.45}
/* 暗色：深色光晕 */
[data-theme="dark"] .orb-1{background:#2f6bff;opacity:.5}
[data-theme="dark"] .orb-2{background:#1e3a8a;opacity:.5}
[data-theme="dark"] .orb-3{background:#0ea5e9;opacity:.28}
.bg-grid{position:absolute;inset:0;display:none;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:48px 48px;
  -webkit-mask-image:radial-gradient(circle at 50% 28%,#000,transparent 78%);
  mask-image:radial-gradient(circle at 50% 28%,#000,transparent 78%)}
[data-theme="dark"] .bg-grid{display:block}

/* ===== 顶栏 ===== */
.nav{position:fixed;top:0;left:0;right:0;height:var(--nav-h);z-index:50;
  background:rgba(255,255,255,.72);backdrop-filter:saturate(180%) blur(20px);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  border-bottom:1px solid var(--line);transition:background .3s,border-color .3s}
[data-theme="dark"] .nav{background:rgba(10,14,26,.66);border-bottom:1px solid rgba(255,255,255,.08)}
.nav-inner{max-width:var(--maxw);margin:0 auto;height:100%;padding:0 24px;
  display:flex;align-items:center;gap:24px}
.brand{font-size:19px;font-weight:700;letter-spacing:.3px;white-space:nowrap}
.nav-links{display:flex;gap:26px;flex:1}
.nav-links a{font-size:14px;color:var(--ink-2);transition:color .2s}
.nav-links a:hover{color:var(--ink)}
.nav-links a.active{color:var(--ink);font-weight:600}
.theme-toggle{width:34px;height:34px;border-radius:50%;border:1px solid var(--line);
  background:transparent;color:var(--ink-2);display:flex;align-items:center;justify-content:center;
  cursor:pointer;flex:none;transition:color .2s,border-color .2s}
.theme-toggle:hover{color:var(--blue);border-color:var(--blue)}
.theme-toggle .ico-moon{display:none}
[data-theme="dark"] .theme-toggle .ico-sun{display:none}
[data-theme="dark"] .theme-toggle .ico-moon{display:block}
.nav-toggle{display:none;flex-direction:column;gap:4px;background:none;border:0;cursor:pointer;padding:6px}
.nav-toggle span{width:20px;height:2px;background:var(--ink);border-radius:2px}

/* ===== 通用 ===== */
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section-alt{background:rgba(245,245,247,.55);transition:background .4s}
[data-theme="dark"] .section-alt{background:var(--bg-alt)}
.kicker{display:inline-block;font-size:13px;font-weight:600;color:var(--blue);
  letter-spacing:.4px;margin-bottom:10px}
h1{font-size:clamp(36px,5.6vw,62px);line-height:1.1;font-weight:700;letter-spacing:-.5px}
h2{font-size:clamp(26px,3.6vw,42px);line-height:1.14;font-weight:700;letter-spacing:-.3px}
h3{font-size:18px;font-weight:600;margin-bottom:8px}
.section-head{text-align:center;max-width:680px;margin:0 auto 48px}
.lead{color:var(--ink-2);font-size:18px;margin-top:14px}
.center{text-align:center;margin-top:36px}

/* ===== 按钮 ===== */
.btn{display:inline-block;font-size:16px;font-weight:500;padding:12px 24px;border-radius:980px;
  transition:transform .15s,background .2s,color .2s,opacity .2s;cursor:pointer;border:1px solid transparent}
.btn-primary{background:var(--blue);color:#fff}
.btn-primary:hover{background:var(--blue-dk);transform:translateY(-1px)}
.btn-ghost{color:var(--blue)}
.btn-ghost:hover{text-decoration:underline}
.btn-block{width:100%;text-align:center;padding:14px}

/* ===== Hero（靠拢黑色版：单列左对齐） ===== */
.hero{padding:calc(var(--nav-h) + 110px) 0 92px}
.hero-inner{max-width:840px}
.eyebrow{display:inline-block;font-size:14px;font-weight:600;color:var(--blue);
  letter-spacing:.4px;margin-bottom:18px;
  padding:6px 14px;border:1px solid var(--line);border-radius:980px;background:var(--card)}
.hero-title{margin-bottom:22px}
.hero-sub{color:var(--ink-2);font-size:20px;margin:0 0 30px;max-width:40em}
.hero-actions{display:flex;gap:18px;flex-wrap:wrap}

/* ===== 内页标题区（关于/服务/工具/联系） ===== */
.subhero{padding:calc(var(--nav-h) + 84px) 0 44px;text-align:center}
.subhero .kicker{margin-bottom:12px}
.subhero h1{margin-bottom:14px}
.subhero p{color:var(--ink-2);font-size:18px;margin:0 auto;max-width:42em}
.subhero .hero-actions{justify-content:center;margin-top:26px}

/* ===== 卡片栅格（玻璃质感，明暗两用） ===== */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px}
.glass{background:rgba(255,255,255,.62);backdrop-filter:blur(18px) saturate(170%);
  -webkit-backdrop-filter:blur(18px) saturate(170%);border:1px solid rgba(0,0,0,.07);
  box-shadow:0 8px 30px rgba(31,38,80,.08);
  transition:transform .2s,box-shadow .2s,border-color .2s,background .4s}
[data-theme="dark"] .glass{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);box-shadow:none}
.glass:hover{transform:translateY(-4px);box-shadow:0 18px 48px rgba(31,38,80,.14)}
[data-theme="dark"] .glass:hover{box-shadow:0 18px 54px rgba(0,0,0,.55)}

.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.service-ico{width:42px;height:42px;border-radius:11px;background:var(--blue);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:700;margin-bottom:14px}
.service p,.cap p{color:var(--ink-2);font-size:14.5px;margin-top:6px}

/* 能力网格 */
.cap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.cap-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:6px}
.cap-head h3{margin-bottom:0}
.tag{font-size:12px;font-weight:600;color:var(--blue);border:1px solid var(--blue);
  border-radius:980px;padding:2px 10px;white-space:nowrap}
.tag-soft{color:var(--ink-2);border-color:var(--line);font-weight:500}
.cap-link{display:inline-block;margin-top:14px;font-size:14px;font-weight:600;color:var(--blue)}
.cap-link:hover{text-decoration:underline}

/* 在线工具：紧凑列表行 */
.tool-list{list-style:none;max-width:760px;margin:0 auto;display:grid;gap:14px}
.tool-row{display:flex;gap:18px;align-items:flex-start;padding:22px 24px;border-radius:var(--radius)}
.tool-ico{flex:none;width:44px;height:44px;border-radius:12px;background:var(--blue);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:700}
.tool-info{flex:1;min-width:0}
.tool-name{display:flex;align-items:center;gap:10px;flex-wrap:wrap;font-size:17px;font-weight:650;color:var(--ink)}
.tool-row p{color:var(--ink-2);font-size:14.5px;margin-top:6px;line-height:1.65}
.tool-note{max-width:760px;margin:22px auto 0;text-align:center;color:var(--ink-2);font-size:14.5px}

/* ===== 关于页：左文 + 右公司信息 ===== */
.about-grid{display:grid;grid-template-columns:1.3fr 1fr;gap:22px;align-items:start}
.about-text p{color:var(--ink);margin-bottom:14px;font-size:16px}
.about-list{list-style:none;margin-top:18px;display:grid;gap:10px}
.about-list li{padding-left:26px;position:relative;color:var(--ink-2);font-size:15px}
.about-list li::before{content:"✓";position:absolute;left:0;top:0;color:var(--blue);font-weight:800}
.about-meta .meta-row{display:flex;justify-content:space-between;gap:16px;padding:14px 0;border-bottom:1px solid var(--line)}
.about-meta .meta-row:last-child{border-bottom:0}
.about-meta .meta-row span{color:var(--ink-2);font-size:14px;flex:none}
.about-meta .meta-row b{text-align:right;font-weight:600;font-size:14.5px;word-break:break-all}

/* ===== 联系 ===== */
.contact-status{max-width:680px;margin:0 auto 26px;display:flex;align-items:center;gap:10px;
  background:#fff8e6;border:1px solid #f3e0a8;color:#8a6d1f;border-radius:12px;padding:12px 16px;font-size:14px;
  transition:background .3s,border-color .3s,color .3s}
.contact-status[hidden]{display:none}
.cs-dot{width:9px;height:9px;border-radius:50%;background:#e0a800;flex:none}
.contact-status.unread .cs-dot{background:#e0533d;box-shadow:0 0 0 4px rgba(224,83,61,.18)}
[data-theme="dark"] .contact-status{background:rgba(224,168,0,.12);border-color:rgba(224,168,0,.4);color:#f0d28a}
.contact-grid{display:grid;grid-template-columns:1fr 1.2fr;gap:24px;max-width:880px;margin:0 auto}
.contact-info .info-row{display:flex;gap:14px;align-items:center;margin-bottom:18px}
.contact-info .ico{width:38px;height:38px;border-radius:10px;background:var(--blue);color:#fff;
  display:flex;align-items:center;justify-content:center;font-size:15px;flex:none}
.contact-info small{display:block;color:var(--ink-2);font-size:13px}
.contact-info b{font-size:16px}
.info-note{color:var(--ink-2);font-size:14px;margin-top:6px}
.field{margin-bottom:16px}
.field label{display:block;font-size:14px;font-weight:500;margin-bottom:7px}
.field label i{color:#e0533d;font-style:normal}
.field input,.field textarea{width:100%;padding:12px 14px;border:1px solid var(--line);
  border-radius:12px;font-size:15px;font-family:inherit;background:var(--bg);color:var(--ink);transition:border .2s,background .2s}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--blue);background:var(--bg)}
.field textarea{resize:vertical}
.err{display:block;color:#e0533d;font-size:12.5px;min-height:15px;margin-top:5px}
.captcha-row{display:flex;gap:12px;align-items:center}
.captcha-img{height:44px;border-radius:10px;cursor:pointer;border:1px solid var(--line);flex:none}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.form-msg{font-size:14px;margin-top:10px;min-height:18px}
.form-msg.ok{color:#1a9e57}
.form-msg.err{color:#e0533d}

/* ===== 页脚 ===== */
.footer{background:var(--bg-alt);border-top:1px solid var(--line);padding:34px 0;transition:background .4s,border-color .4s}
.footer-inner{max-width:var(--maxw);margin:0 auto;padding:0 24px;display:flex;
  flex-direction:column;gap:10px;align-items:center;text-align:center}
.footer-brand{font-weight:700;font-size:16px}
.footer-meta{display:flex;flex-wrap:wrap;gap:8px 22px;justify-content:center;
  color:var(--ink-2);font-size:13px}
.footer-meta a{color:var(--blue)}
.footer-meta a:hover{text-decoration:underline}

/* ===== Toast ===== */
.toast{position:fixed;left:50%;bottom:32px;transform:translateX(-50%) translateY(20px);
  background:var(--ink);color:var(--bg);padding:12px 22px;border-radius:12px;font-size:14px;
  border:1px solid transparent;opacity:0;pointer-events:none;transition:opacity .3s,transform .3s;z-index:80}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ===== 滚动入场（保留，未强制使用） ===== */
.reveal{opacity:0;transform:translateY(30px);transition:opacity .8s ease,transform .8s ease}
.reveal.in{opacity:1;transform:none}

/* ===== 响应式 ===== */
@media (max-width:880px){
  .cards{grid-template-columns:repeat(2,1fr)}
  .cap-grid{grid-template-columns:repeat(2,1fr)}
  .about-grid{grid-template-columns:1fr}
  .contact-grid{grid-template-columns:1fr}
  .nav-links{position:fixed;top:var(--nav-h);left:0;right:0;flex-direction:column;gap:0;
    background:var(--bg);backdrop-filter:blur(20px);border-bottom:1px solid var(--line);
    max-height:0;overflow:hidden;transition:max-height .3s}
  .nav-links.open{max-height:300px}
  .nav-links a{padding:14px 24px;border-bottom:1px solid var(--line);font-size:16px}
  .nav-toggle{display:flex}
  .theme-toggle{margin-left:auto}
}
@media (max-width:520px){
  .cards{grid-template-columns:1fr}
  .cap-grid{grid-template-columns:1fr}
  .section{padding:64px 0}
  .hero{padding:calc(var(--nav-h) + 70px) 0 64px}
}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  html{scroll-behavior:auto}
}