/* ==========================================================
   天道元一 v9 独立页样式 —— 给人看，也给 AI 读
   零外链：不依赖 Font Awesome / Google Fonts / CDN
   图标全部使用内联 SVG（在各页面 HTML 里）
   ========================================================== */

:root{
    --orange:#FF3C00;
    --orange-soft:#FF6A33;
    --blue:#1A73E8;
    --blue-soft:#4B9BFF;
    --dark-bg:#080B1A;
    --dark-bg2:#0C1024;
    --card:#121830;
    --card-2:#161E3D;
    --border:rgba(255,255,255,.08);
    --border-strong:rgba(255,255,255,.16);
    --txt:#FFFFFF;
    --txt2:#C7D3EE;
    --txt3:#8B9BC0;
    --txt4:#5E6E91;
    --grad:linear-gradient(135deg,#FF3C00 0%,#1A73E8 100%);
    --grad-soft:linear-gradient(135deg,rgba(255,60,0,.14),rgba(26,115,232,.14));
    --shadow:0 12px 40px rgba(0,0,0,.35);
    --r:14px;
    --r-lg:22px;
    --max:1180px;
    --ease:cubic-bezier(.22,.68,.35,1);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
    font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei","Hiragino Sans GB","WenQuanYi Micro Hei",sans-serif;
    background:var(--dark-bg);
    color:var(--txt);
    line-height:1.75;
    overflow-x:hidden;
    -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.container{max-width:var(--max);margin:0 auto;padding:0 24px}

/* ---------- 背景光晕 ---------- */
body::before{
    content:"";position:fixed;inset:0;z-index:-2;
    background:
        radial-gradient(900px 500px at 12% -8%,rgba(255,60,0,.16),transparent 60%),
        radial-gradient(800px 600px at 88% 10%,rgba(26,115,232,.16),transparent 60%),
        var(--dark-bg);
}
body::after{
    content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
    background-image:linear-gradient(rgba(255,255,255,.018) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.018) 1px,transparent 1px);
    background-size:44px 44px;mask-image:radial-gradient(ellipse at 50% 30%,#000 35%,transparent 75%);
}

/* ---------- 内联 SVG 图标通用尺寸 ---------- */
svg{display:inline-block;vertical-align:middle;fill:currentColor}
.ic{width:1em;height:1em;fill:currentColor;flex-shrink:0}
.card-ic svg{width:24px;height:24px;fill:none;stroke:currentColor;stroke-width:1.8}
.case-banner svg{width:22px;height:22px;fill:none;stroke:currentColor;stroke-width:1.8}
/* 文字中图标：与字号对齐 */
.eyebrow svg,.sec-tag svg,.step-body h4 svg,.hero-actions .btn svg,.cta-box .btn svg,
.cta-strip .btn svg,.case-link svg,.back-link svg{width:1em;height:1em}

/* ---------- 导航 ---------- */
.sub-header{
    position:sticky;top:0;z-index:100;
    background:rgba(8,11,26,.82);
    backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
    border-bottom:1px solid var(--border);
}
.sub-header-row{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo-link{display:inline-flex;align-items:center;gap:11px;flex-shrink:0}
.logo-img{width:36px;height:36px;flex:0 0 auto;border-radius:9px;background:#fff;padding:3px;box-shadow:0 0 10px rgba(255,60,0,.25);object-fit:contain;transition:.3s}
.logo-img:hover{transform:scale(1.05)}
.logo-svg{width:34px;height:34px;flex:0 0 auto;border-radius:9px;display:block}
.logo-text{font-size:1.08rem;font-weight:800;letter-spacing:.5px;
    background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.top-nav{display:flex;align-items:center;gap:6px;flex:1;justify-content:center;flex-wrap:wrap}
.top-nav a{font-size:.9rem;color:var(--txt3);padding:7px 13px;border-radius:8px;transition:.2s;white-space:nowrap}
.top-nav a:hover{color:var(--txt);background:var(--card)}
.back-link{display:inline-flex;align-items:center;gap:7px;font-size:.9rem;color:var(--txt3);
    padding:8px 14px;border:1px solid var(--border);border-radius:999px;transition:.25s var(--ease);white-space:nowrap}
.back-link:hover{color:var(--txt);border-color:var(--border-strong);background:var(--card)}
.back-link svg{width:14px;height:14px;flex:0 0 auto}

/* ---------- Hero ---------- */
.page-hero{
    padding:64px 0 40px;position:relative;
}
.hero-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.82rem;font-weight:700;
    letter-spacing:1.6px;text-transform:uppercase;color:var(--orange);margin-bottom:18px}
.eyebrow svg{width:15px;height:15px}
.page-title{font-size:clamp(2rem,4.4vw,3.4rem);font-weight:900;line-height:1.18;letter-spacing:-.5px;margin-bottom:20px;text-shadow:0 2px 20px rgba(0,0,0,.3)}
.hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.page-sub{font-size:1.05rem;color:var(--txt2);max-width:620px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin-top:30px}
.btn{
    display:inline-flex;align-items:center;gap:9px;font-size:.95rem;font-weight:700;
    padding:13px 26px;border-radius:12px;border:1px solid transparent;cursor:pointer;
    transition:.28s var(--ease);white-space:nowrap
}
.btn svg{width:16px;height:16px;flex:0 0 auto}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 28px rgba(255,60,0,.32)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 16px 38px rgba(255,60,0,.45)}
.btn-ghost{background:var(--card);color:var(--txt);border-color:var(--border-strong)}
.btn-ghost:hover{background:var(--card-2);transform:translateY(-3px)}

.hero-card{position:relative;background:linear-gradient(160deg,var(--card),var(--dark-bg2));
    border:1px solid var(--border);border-radius:var(--r-lg);padding:28px;box-shadow:var(--shadow);backdrop-filter:blur(10px)}
.hero-card::before{content:"";position:absolute;inset:0;border-radius:var(--r-lg);padding:1px;
    background:var(--grad);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
    mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);
    -webkit-mask-composite:xor;mask-composite:exclude;opacity:.5}
.hc-label{font-size:.78rem;color:var(--txt3);letter-spacing:1px;margin-bottom:18px}
.hc-row{display:flex;align-items:center;gap:14px;padding:12px 0;border-bottom:1px dashed var(--border)}
.hc-row:last-child{border-bottom:none;padding-bottom:0}
.hc-row svg{width:22px;height:22px;flex:0 0 auto;color:var(--orange)}
.hc-txt strong{display:block;font-size:.95rem;line-height:1.45}
.hc-txt span{font-size:.8rem;color:var(--txt3)}

/* ---------- 通用区块 ---------- */
section{padding:60px 0}
.sec-head{margin-bottom:34px;max-width:760px}
.sec-tag{display:inline-flex;align-items:center;gap:8px;font-size:.8rem;font-weight:800;
    letter-spacing:1.4px;text-transform:uppercase;color:var(--orange);margin-bottom:12px}
.sec-tag svg{width:15px;height:15px}
.sec-title{font-size:clamp(1.55rem,3vw,2.25rem);font-weight:900;line-height:1.3;letter-spacing:-.3px}
.sec-desc{font-size:1rem;color:var(--txt2);margin-top:12px}

/* ---------- 数据带 ---------- */
.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.stat-item{position:relative;background:var(--card);border:1px solid var(--border);
    border-radius:var(--r);padding:26px 20px;text-align:center;overflow:hidden;transition:.3s var(--ease)}
.stat-item::after{content:"";position:absolute;left:0;right:0;bottom:0;height:3px;background:var(--grad);transform:scaleX(0);transition:.35s var(--ease)}
.stat-item:hover{transform:translateY(-5px);border-color:var(--border-strong)}
.stat-item:hover::after{transform:scaleX(1)}
.stat-num{font-size:clamp(1.7rem,3.4vw,2.5rem);font-weight:900;line-height:1;letter-spacing:-1px;
    background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.stat-label{font-size:.88rem;color:var(--txt3);margin-top:10px}

/* ---------- 卡片网格 ---------- */
.grid{display:grid;gap:20px}
.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{position:relative;background:var(--card);border:1px solid var(--border);border-radius:var(--r);
    padding:28px 24px;transition:.32s var(--ease)}
.card:hover{transform:translateY(-6px);border-color:rgba(255,60,0,.42);box-shadow:0 18px 44px rgba(0,0,0,.4),0 0 30px rgba(255,60,0,.08)}
.card-ic{width:48px;height:48px;border-radius:13px;display:flex;align-items:center;justify-content:center;
    background:var(--grad-soft);margin-bottom:18px;color:var(--orange)}
.card-ic svg{width:24px;height:24px}
.card h3{font-size:1.18rem;font-weight:800;margin-bottom:10px;line-height:1.45}
.card p{font-size:.93rem;color:var(--txt2);line-height:1.72}
.card .tag{display:inline-block;font-size:.72rem;font-weight:800;letter-spacing:1px;color:var(--blue-soft);
    background:rgba(26,115,232,.12);border:1px solid rgba(26,115,232,.28);padding:4px 10px;border-radius:999px;margin-bottom:14px}
.card-link{display:inline-flex;align-items:center;gap:7px;font-size:.86rem;font-weight:700;color:var(--orange);
    margin-top:16px;transition:.2s}
.card-link svg{width:14px;height:14px}
.card-link:hover{gap:11px}

/* ---------- 流程步骤 ---------- */
.steps{display:grid;gap:0;position:relative}
.step{display:flex;gap:22px;position:relative;padding-bottom:32px}
.step:last-child{padding-bottom:0}
.step::before{content:"";position:absolute;left:19px;top:42px;bottom:0;width:2px;background:linear-gradient(var(--orange),var(--blue))}
.step:last-child::before{display:none}
.step-n{width:40px;height:40px;flex:0 0 auto;border-radius:50%;display:flex;align-items:center;justify-content:center;
    font-weight:900;font-size:1rem;color:#fff;background:var(--grad);box-shadow:0 6px 18px rgba(255,60,0,.32);z-index:1}
.step-body{flex:1;background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:20px 22px}
.step-body h4{font-size:1.08rem;font-weight:800;margin-bottom:6px}
.step-body p{font-size:.9rem;color:var(--txt2)}

/* ---------- 表格 ---------- */
.tbl-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--r);background:var(--card)}
table{width:100%;border-collapse:collapse;font-size:.92rem;min-width:640px}
thead th{background:var(--grad-soft);text-align:left;padding:15px 18px;font-weight:800;font-size:.85rem;letter-spacing:.5px;white-space:nowrap}
tbody td{padding:14px 18px;border-top:1px solid var(--border);color:var(--txt2);vertical-align:top}
tbody tr:hover{background:rgba(255,255,255,.025)}
td strong{color:var(--txt)}

/* ---------- 信息列表 ---------- */
.info-list{border:1px solid var(--border);border-radius:var(--r);overflow:hidden;background:var(--card)}
.info-row{display:flex;gap:18px;padding:17px 22px;border-bottom:1px solid var(--border)}
.info-row:last-child{border-bottom:none}
.info-row:nth-child(even){background:rgba(255,255,255,.02)}
.info-k{flex:0 0 150px;display:flex;align-items:center;gap:10px;font-weight:800;font-size:.92rem;color:var(--txt)}
.info-k svg{width:18px;height:18px;flex:0 0 auto;color:var(--orange)}
.info-v{flex:1;font-size:.93rem;color:var(--txt2)}
.info-v a{color:var(--blue-soft);border-bottom:1px dashed currentColor}
.info-v a:hover{color:var(--orange)}

/* ---------- 对比 ---------- */
.vs{display:grid;grid-template-columns:1fr 56px 1fr;gap:0;align-items:stretch}
.vs-col{background:var(--card);border:1px solid var(--border);border-radius:var(--r);padding:26px 22px}
.vs-col.best{border-color:rgba(255,60,0,.5);box-shadow:0 14px 40px rgba(255,60,0,.14)}
.vs-mid{display:flex;align-items:center;justify-content:center;font-weight:900;font-size:1.1rem;color:var(--txt3)}
.vs-h{display:flex;align-items:center;gap:10px;font-size:1.1rem;font-weight:900;margin-bottom:16px}
.vs-h svg{width:22px;height:22px;color:var(--orange)}
.vs-col ul{list-style:none}
.vs-col li{font-size:.9rem;color:var(--txt2);padding:9px 0 9px 22px;position:relative;border-bottom:1px dashed var(--border)}
.vs-col li:last-child{border-bottom:none}
.vs-col li::before{content:"";position:absolute;left:0;top:16px;width:7px;height:7px;border-radius:50%;background:var(--orange)}

/* ---------- FAQ ---------- */
.faq-group{margin-bottom:14px;border:1px solid var(--border);border-radius:var(--r);background:var(--card);overflow:hidden}
.faq-q{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;text-align:left;
    padding:20px 24px;background:none;border:none;cursor:pointer;font-size:1.02rem;font-weight:700;color:var(--txt);font-family:inherit}
.faq-q:hover{background:rgba(255,255,255,.03)}
.faq-q .q-tag{font-size:.72rem;font-weight:800;letter-spacing:1px;color:var(--blue-soft);background:rgba(26,115,232,.12);
    border:1px solid rgba(26,115,232,.28);padding:3px 9px;border-radius:999px;flex:0 0 auto}
.faq-q .q-ic{width:26px;height:26px;flex:0 0 auto;border-radius:50%;display:flex;align-items:center;justify-content:center;
    background:var(--grad);color:#fff;font-size:1rem;line-height:1;transition:.3s var(--ease)}
.faq-group.open .faq-q .q-ic{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .4s var(--ease)}
.faq-a-in{padding:0 24px 22px;font-size:.93rem;color:var(--txt2);line-height:1.8}
.faq-a-in strong{color:var(--txt)}

/* ---------- 案例 ---------- */
.case-card{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--border);border-radius:var(--r-lg);
    overflow:hidden;transition:.35s var(--ease)}
.case-card:hover{transform:translateY(-7px);border-color:rgba(26,115,232,.5);box-shadow:0 20px 50px rgba(0,0,0,.42)}
.case-banner{position:relative;padding:30px 28px;background:var(--grad-soft);border-bottom:1px solid var(--border)}
.case-banner::after{content:"";position:absolute;right:-30px;top:-30px;width:140px;height:140px;border-radius:50%;
    background:var(--grad);opacity:.14;filter:blur(8px)}
.case-cat{display:inline-block;font-size:.76rem;font-weight:800;letter-spacing:1px;color:var(--orange);
    background:rgba(255,60,0,.12);border:1px solid rgba(255,60,0,.3);padding:4px 11px;border-radius:999px;margin-bottom:14px}
.case-name{font-size:1.3rem;font-weight:900;line-height:1.4}
.case-body{padding:22px 26px;flex:1;display:flex;flex-direction:column;gap:14px}
.case-meta{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.case-meta div{font-size:.86rem}
.case-meta dt{color:var(--txt4);font-size:.76rem;letter-spacing:.6px;text-transform:uppercase;margin-bottom:2px}
.case-meta dd{color:var(--txt);font-weight:600}
.case-result{margin-top:auto;background:rgba(26,115,232,.09);border:1px solid rgba(26,115,232,.22);
    border-radius:var(--r);padding:14px 16px}
.case-result b{display:block;font-size:1.05rem;color:var(--blue-soft);margin-bottom:4px}
.case-result p{font-size:.86rem;color:var(--txt2);line-height:1.65}

/* ---------- CTA ---------- */
.cta-box{position:relative;overflow:hidden;background:linear-gradient(135deg,#141A33,#0E1230);
    border:1px solid var(--border-strong);border-radius:var(--r-lg);padding:48px 44px;text-align:center}
.cta-box::before{content:"";position:absolute;width:420px;height:420px;border-radius:50%;background:var(--grad);
    opacity:.16;filter:blur(40px);top:-200px;left:50%;transform:translateX(-50%)}
.cta-box h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:900;margin-bottom:14px;position:relative}
.cta-box p{font-size:1rem;color:var(--txt2);max-width:660px;margin:0 auto 26px;position:relative}

/* ---------- 底部 CTA 条 ---------- */
.cta-strip{position:fixed;left:0;right:0;bottom:0;z-index:90;background:rgba(10,14,30,.94);
    backdrop-filter:blur(12px);border-top:1px solid var(--border-strong);
    padding:12px 24px;transform:translateY(120%);transition:.45s var(--ease)}
.cta-strip.show{transform:translateY(0)}
.cta-strip-in{display:flex;align-items:center;justify-content:space-between;gap:18px;max-width:var(--max);margin:0 auto}
.cta-strip-txt{font-size:.92rem;font-weight:700}
.cta-strip-txt span{color:var(--txt3);font-weight:400;font-size:.83rem;display:block}
body{padding-bottom:74px}

/* ---------- Footer ---------- */
footer{background:#050712;border-top:1px solid var(--border);padding:52px 0 70px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;margin-bottom:34px}
.footer-brand p{font-size:.9rem;color:var(--txt3);margin-top:16px;max-width:300px;line-height:1.75}
.footer-col h4{font-size:.92rem;font-weight:800;margin-bottom:16px;color:var(--txt)}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:.9rem;color:var(--txt3);transition:.2s}
.footer-col a:hover{color:var(--orange)}
.footer-bottom{border-top:1px solid var(--border);padding-top:24px;display:flex;justify-content:space-between;
    flex-wrap:wrap;gap:12px;font-size:.83rem;color:var(--txt4)}

/* ---------- 入场动画 ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s var(--ease),transform .7s var(--ease)}
.reveal.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:960px){
    .hero-inner{grid-template-columns:1fr;gap:36px}
    .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
    .footer-grid{grid-template-columns:1fr 1fr;gap:30px}
    .vs{grid-template-columns:1fr}
    .vs-mid{padding:6px 0}
    .info-k{flex:0 0 110px;font-size:.85rem}
}
@media (max-width:640px){
    section{padding:38px 0}
    .page-hero{padding:40px 0 26px}
    .container{padding:0 18px}
    .sub-header-row{height:58px}
    .logo-text{display:none}
    .back-link{font-size:.82rem;padding:7px 11px}
    .back-link span{display:none}
    .grid-2,.grid-3,.grid-4,.stat-grid{grid-template-columns:1fr}
    .stat-item{padding:22px 16px}
    .info-row{flex-direction:column;gap:6px;padding:14px 18px}
    .info-k{flex:none}
    .case-meta{grid-template-columns:1fr}
    .cta-box{padding:34px 22px}
    .footer-grid{grid-template-columns:1fr;gap:26px}
    .footer-bottom{flex-direction:column;text-align:center}
    .cta-strip-in{flex-direction:column;text-align:center}
    .cta-strip-in .btn{padding:11px 22px;font-size:.88rem}
    body{padding-bottom:96px}
}