/* ============================================================
   TRXEG.com — 官网样式表 (v1.0)
   深色科技蓝主题 · 移动优先响应式 · SEO 友好排版
   ============================================================ */
:root{
  --bg:#0a1020;
  --bg-soft:#0e1526;
  --card:#121c31;
  --card-2:#17223a;
  --border:rgba(120,160,255,.14);
  --border-strong:rgba(120,160,255,.26);
  --text:#e8eef8;
  --text-dim:#9fb0c8;
  --text-faint:#8fa3b9;
  --brand:#38bdf8;
  --brand-2:#2563eb;
  --accent:#34d399;
  --accent-2:#22d3ee;
  --grad:linear-gradient(135deg,#38bdf8,#2563eb 55%,#34d399);
  --grad-soft:linear-gradient(135deg,rgba(56,189,248,.14),rgba(37,99,235,.14) 55%,rgba(52,211,153,.12));
  --radius:14px;
  --radius-sm:10px;
  --maxw:1120px;
  --font:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  --mono:"SFMono-Regular",ui-monospace,"Cascadia Mono","Consolas",monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--text);font-family:var(--font);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none;transition:color .2s}
a:hover{color:var(--accent)}
ul,ol{padding-left:1.3em}

/* ---------- 布局容器 ---------- */
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.section{padding:72px 0}
.section-alt{background:var(--bg-soft)}
.section-tight{padding:44px 0}

/* ---------- 顶部导航 ---------- */
.site-header{position:sticky;top:0;z-index:100;background:rgba(10,16,32,.88);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.28rem;color:var(--text);letter-spacing:.2px}
.logo .mark{width:34px;height:34px;border-radius:9px;background:var(--grad);display:grid;place-items:center;font-size:.92rem;color:#04121f;font-weight:900}
.nav-links{display:flex;align-items:center;gap:6px;list-style:none}
.nav-links a{color:var(--text-dim);padding:8px 13px;border-radius:8px;font-size:.95rem;font-weight:500}
.nav-links a:hover,.nav-links a.active{color:var(--text);background:rgba(120,160,255,.1)}
.nav-cta{display:flex;align-items:center;gap:10px}
.nav-burger{display:none;background:none;border:1px solid var(--border);border-radius:8px;color:var(--text);padding:8px 10px;font-size:1.1rem;cursor:pointer}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:11px;font-weight:700;font-size:1rem;border:1px solid transparent;cursor:pointer;transition:transform .15s,box-shadow .2s,background .2s;line-height:1.4}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--grad);color:#04121f;box-shadow:0 8px 24px rgba(56,189,248,.25)}
.btn-primary:hover{color:#04121f;box-shadow:0 10px 30px rgba(56,189,248,.38)}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--border-strong)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-tg{background:linear-gradient(135deg,#2aabee,#229ed9);color:#fff;box-shadow:0 8px 24px rgba(42,171,238,.28)}
.btn-tg:hover{color:#fff;box-shadow:0 10px 30px rgba(42,171,238,.42)}
.btn-lg{padding:15px 30px;font-size:1.08rem}
.btn-sm{padding:9px 16px;font-size:.9rem}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;padding:96px 0 80px}
.hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(600px 400px at 12% 8%,rgba(56,189,248,.16),transparent 60%),
  radial-gradient(700px 500px at 88% 30%,rgba(52,211,153,.12),transparent 60%),
  radial-gradient(500px 400px at 50% 110%,rgba(37,99,235,.14),transparent 60%);
  pointer-events:none}
.hero-inner{position:relative;text-align:center;max-width:840px;margin:0 auto}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:7px 16px;border:1px solid var(--border-strong);border-radius:100px;font-size:.85rem;color:var(--accent-2);background:rgba(52,211,153,.07);margin-bottom:22px;font-weight:600}
.hero h1{font-size:clamp(2rem,5.2vw,3.3rem);line-height:1.22;font-weight:900;letter-spacing:-.5px;margin-bottom:20px}
.hero h1 .grad-text{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:clamp(1.02rem,2vw,1.2rem);color:var(--text-dim);max-width:680px;margin:0 auto 32px}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero-trust{display:flex;gap:26px;justify-content:center;flex-wrap:wrap;margin-top:44px;color:var(--text-faint);font-size:.9rem}
.hero-trust span{display:inline-flex;align-items:center;gap:7px}

/* ---------- 区块标题 ---------- */
.sec-head{text-align:center;max-width:680px;margin:0 auto 48px}
.sec-head .eyebrow{color:var(--accent-2);font-weight:700;font-size:.86rem;letter-spacing:1.5px;text-transform:uppercase;margin-bottom:10px}
.sec-head h2{font-size:clamp(1.55rem,3.4vw,2.1rem);font-weight:800;line-height:1.3;margin-bottom:14px}
.sec-head p{color:var(--text-dim)}

/* ---------- 服务卡片网格 ---------- */
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px;transition:transform .2s,border-color .2s,box-shadow .2s}
.card:hover{transform:translateY(-4px);border-color:var(--border-strong);box-shadow:0 16px 40px rgba(0,0,0,.35)}
.card .icon{width:52px;height:52px;border-radius:13px;background:var(--grad-soft);border:1px solid var(--border);display:grid;place-items:center;font-size:1.5rem;margin-bottom:18px}
.card h3{font-size:1.18rem;font-weight:700;margin-bottom:10px}
.card p{color:var(--text-dim);font-size:.96rem}
.card .card-link{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-weight:600;font-size:.95rem}

/* ---------- 流程步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;counter-reset:step}
.step{position:relative;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:26px 24px 26px 62px}
.step::before{counter-increment:step;content:counter(step);position:absolute;left:20px;top:24px;width:30px;height:30px;border-radius:9px;background:var(--grad);color:#04121f;font-weight:900;display:grid;place-items:center;font-size:.95rem}
.step h3{font-size:1.05rem;margin-bottom:8px}
.step p{color:var(--text-dim);font-size:.93rem}

/* ---------- 价格表 ---------- */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.price-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:30px;text-align:center;position:relative}
.price-card.featured{border-color:var(--accent);box-shadow:0 14px 40px rgba(52,211,153,.14)}
.price-card .p-name{color:var(--text-dim);font-size:.92rem;font-weight:600;margin-bottom:14px}
.price-card .p-price{font-size:2.2rem;font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:4px}
.price-card .p-unit{color:var(--text-faint);font-size:.88rem;margin-bottom:18px}
.price-card ul{list-style:none;text-align:left;padding:0;margin:0 0 22px;color:var(--text-dim);font-size:.92rem}
.price-card ul li{padding:6px 0;border-bottom:1px dashed var(--border);display:flex;gap:8px}
.price-card ul li:last-child{border-bottom:none}
.price-card ul li::before{content:"✓";color:var(--accent);font-weight:900;flex:none}

/* ---------- 表格 ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);background:var(--card)}
table{width:100%;border-collapse:collapse;font-size:.95rem;min-width:560px}
thead th{background:var(--card-2);padding:14px 18px;text-align:left;font-weight:700;color:var(--text);border-bottom:1px solid var(--border-strong);white-space:nowrap}
tbody td{padding:14px 18px;border-bottom:1px solid var(--border);color:var(--text-dim);vertical-align:top}
tbody tr:last-child td{border-bottom:none}
tbody td:first-child{color:var(--text);font-weight:600}

/* ---------- 特点清单（勾选） ---------- */
.check-list{list-style:none;padding:0}
.check-list li{position:relative;padding:9px 0 9px 30px;color:var(--text-dim)}
.check-list li::before{content:"✓";position:absolute;left:0;top:9px;width:20px;height:20px;border-radius:6px;background:rgba(52,211,153,.14);color:var(--accent);font-weight:900;display:grid;place-items:center;font-size:.8rem}

/* ---------- FAQ ---------- */
.faq{max-width:820px;margin:0 auto}
.faq details{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);margin-bottom:12px;overflow:hidden}
.faq summary{list-style:none;cursor:pointer;padding:18px 22px;font-weight:600;font-size:1rem;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";font-size:1.4rem;color:var(--accent-2);font-weight:400;transition:transform .2s;flex:none}
.faq details[open] summary::after{transform:rotate(45deg)}
.faq .a{padding:0 22px 20px;color:var(--text-dim);font-size:.96rem}

/* ---------- CTA 引流区 ---------- */
.cta{background:var(--grad-soft);border:1px solid var(--border-strong);border-radius:var(--radius);padding:52px 34px;text-align:center;position:relative;overflow:hidden}
.cta h2{font-size:clamp(1.4rem,3vw,1.9rem);font-weight:800;margin-bottom:14px}
.cta p{color:var(--text-dim);max-width:560px;margin:0 auto 28px}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.cta-contacts{display:flex;gap:22px;justify-content:center;flex-wrap:wrap;margin-top:26px;color:var(--text-dim);font-size:.94rem}
.cta-contacts a{font-weight:600}

/* ---------- 页脚 ---------- */
.site-footer{border-top:1px solid var(--border);padding:56px 0 34px;background:var(--bg-soft)}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:34px;margin-bottom:40px}
.footer-grid .f-title{font-size:.98rem;font-weight:700;margin:0 0 16px;color:var(--text)}
.footer-grid ul{list-style:none;padding:0}
.footer-grid ul li{margin-bottom:10px}
.footer-grid ul a{color:var(--text-dim);font-size:.93rem}
.footer-grid ul a:hover{color:var(--brand)}
.footer-brand p{color:var(--text-faint);font-size:.92rem;margin-top:12px;max-width:320px}
.footer-bottom{border-top:1px solid var(--border);padding-top:22px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;color:var(--text-faint);font-size:.86rem}

/* ---------- 文章/教程 ---------- */
.article{max-width:780px;margin:0 auto}
.article .meta{color:var(--text-faint);font-size:.9rem;margin:16px 0 30px;display:flex;gap:16px;flex-wrap:wrap}
.breadcrumb{font-size:.88rem;color:var(--text-faint);margin:26px 0 10px;line-height:2.2}
.breadcrumb a{display:inline-block;padding:8px 10px;margin:0 -8px 0 -4px}
.breadcrumb a{color:var(--text-dim)}
.article h1{font-size:clamp(1.7rem,3.6vw,2.3rem);font-weight:900;line-height:1.3}
.article h2{font-size:1.4rem;font-weight:800;margin:42px 0 16px;padding-left:14px;border-left:4px solid var(--brand);line-height:1.35}
.article h3{font-size:1.16rem;font-weight:700;margin:30px 0 12px}
.article p,.article li{color:var(--text-dim)}
.article a{display:inline-block;padding:3px 4px}
.article p{margin-bottom:16px}
.article ul,.article ol{margin-bottom:18px}
.article li{margin-bottom:8px}
.article .callout{background:var(--grad-soft);border:1px solid var(--border-strong);border-left:4px solid var(--accent);border-radius:var(--radius-sm);padding:18px 22px;margin:26px 0}
.article .callout p{margin:0;color:var(--text)}
.article code{font-family:var(--mono);background:rgba(120,160,255,.12);padding:2px 7px;border-radius:6px;font-size:.9em;color:var(--accent-2)}
.article pre{background:#0b1322;border:1px solid var(--border);border-radius:var(--radius-sm);padding:18px 20px;overflow-x:auto;margin:20px 0;font-size:.9rem}
.article pre code{background:none;padding:0;color:var(--text)}
.article .toc{background:var(--card);border:1px solid var(--border);border-radius:var(--radius-sm);padding:20px 24px;margin:28px 0}
.article .toc .toc-title{font-size:1rem;font-weight:700;margin-bottom:10px;color:var(--text)}
.article .toc ul{list-style:none;padding:0}
.article .toc li{margin-bottom:6px;padding-left:18px;position:relative}
.article .toc li::before{content:"▸";position:absolute;left:0;color:var(--accent-2)}

/* ---------- 指南索引 ---------- */
.guide-item{display:flex;gap:18px;align-items:flex-start;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;margin-bottom:16px;transition:transform .2s,border-color .2s}
.guide-item:hover{transform:translateY(-3px);border-color:var(--border-strong)}
.guide-item .g-icon{width:46px;height:46px;border-radius:12px;background:var(--grad-soft);border:1px solid var(--border);display:grid;place-items:center;font-size:1.3rem;flex:none}
.guide-item h3{font-size:1.08rem;margin-bottom:6px}
.guide-item p{color:var(--text-dim);font-size:.93rem;margin-bottom:8px}
.guide-item .g-link{font-weight:600;font-size:.92rem}

/* ---------- 关于页 ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.contact-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px}
.contact-card .icon{font-size:1.7rem;margin-bottom:12px}
.contact-card h3{font-size:1.1rem;margin-bottom:8px}
.contact-card p{color:var(--text-dim);font-size:.95rem;margin-bottom:14px}
.contact-card .handle{font-family:var(--mono);color:var(--brand);font-size:1rem;font-weight:600}

/* ---------- 404 ---------- */
.error-page{text-align:center;padding:120px 20px}
.error-page .code{font-size:clamp(4rem,12vw,7rem);font-weight:900;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.error-page h1{font-size:1.6rem;margin:18px 0 10px}
.error-page p{color:var(--text-dim);margin-bottom:30px}

/* ---------- 响应式 ---------- */
@media (max-width:960px){
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .price-grid{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .contact-grid{grid-template-columns:1fr}
}
@media (max-width:720px){
  .section{padding:56px 0}
  .nav-burger{display:inline-flex}
  .nav-links{position:fixed;inset:66px 0 auto 0;background:var(--bg-soft);flex-direction:column;align-items:stretch;padding:12px 16px 18px;border-bottom:1px solid var(--border);display:none;gap:2px;box-shadow:0 20px 40px rgba(0,0,0,.4)}
  .nav-links.open{display:flex}
  .nav-links a{padding:13px 12px;font-size:1.05rem}
  .nav-cta .btn-sm{display:none}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .hero{padding:64px 0 52px}
  .hero-trust{gap:14px;flex-direction:column;align-items:center}
  .footer-grid{grid-template-columns:1fr}
}

/* ---------- 打印与无障碍 ---------- */
@media (prefers-reduced-motion:reduce){
  *{transition:none!important;animation:none!important;scroll-behavior:auto!important}
}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.skip-link{position:absolute;left:-999px;top:0;background:var(--brand);color:#04121f;padding:10px 16px;border-radius:0 0 8px 0;z-index:200;font-weight:700}
.skip-link:focus{left:0}