/* ============================================================
   mrxue.com v3 — 老薛个人 IP · 快递经营 × AI · B 端获客官网
   白底 + 专业深蓝 + 铜金点缀，规整网格，干净现代
   ============================================================ */
:root{
  --ink:#15212e; --body:#3d4b59; --soft:#647281; --line:#e6eaf0; --line-2:#d4dbe4;
  --navy:#16365a; --navy-d:#0f2740; --navy-l:#1e4a78;
  --gold:#945c1b; --gold-l:#c28f45; --gold-bg:#f7efe3;
  --bg:#ffffff; --bg-2:#f6f8fb; --bg-3:#eef2f6;
  --good:#2f7d5b;
  --radius:12px; --radius-sm:7px;
  --container:1180px;
  --shadow:0 1px 2px rgba(21,33,46,.04),0 10px 30px rgba(21,33,46,.05);
  --shadow-lg:0 20px 50px rgba(15,39,64,.16);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Hiragino Sans GB","Noto Sans SC","Microsoft YaHei",sans-serif;color:var(--body);background:var(--bg);line-height:1.72;-webkit-font-smoothing:antialiased;font-size:16px}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
button{font:inherit;cursor:pointer}
.container{width:min(var(--container),calc(100% - 48px));margin:0 auto}
h1,h2,h3,h4{color:var(--ink);line-height:1.25;font-weight:700;letter-spacing:-.01em}
strong{color:var(--ink)}
:focus-visible{outline:2px solid var(--navy);outline-offset:3px;border-radius:3px}

/* ---------- 顶部企业导航条 ---------- */
.topbar{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;height:70px;gap:24px}
.logo{display:flex;flex-direction:column;line-height:1.2}
.logo b{font-size:1.12rem;color:var(--ink);letter-spacing:0}
.logo span{font-size:.64rem;color:var(--soft);letter-spacing:.2em;text-transform:uppercase;margin-top:3px}
.mainnav{display:flex;align-items:center;gap:32px;font-size:.95rem;font-weight:500;color:var(--body)}
.mainnav a{position:relative;padding:6px 0;transition:color .15s}
.mainnav a:hover,.mainnav a.active{color:var(--navy)}
.mainnav a.active::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--navy)}
.topbar-cta{display:inline-flex;align-items:center;height:42px;padding:0 20px;border-radius:var(--radius-sm);background:var(--navy);color:#fff;font-size:.92rem;font-weight:600;transition:background .15s}
.topbar-cta:hover{background:var(--navy-d)}
.nav-toggle{display:none;flex-direction:column;gap:5px;width:42px;height:42px;align-items:center;justify-content:center;border:1px solid var(--line-2);border-radius:var(--radius-sm);background:#fff}
.nav-toggle span{width:20px;height:2px;background:var(--ink);border-radius:2px;transition:.2s}

/* ---------- Hero ---------- */
.hero{background:linear-gradient(118deg,var(--navy-d) 0%,var(--navy) 58%,var(--navy-l) 100%);color:#eaf0f6;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:0;top:-80px;width:480px;height:480px;border-radius:50%;background:radial-gradient(circle,rgba(255,255,255,.06),transparent 70%);pointer-events:none}
.hero-inner{display:grid;grid-template-columns:1.12fr .88fr;gap:64px;align-items:center;padding:104px 0 108px;position:relative;z-index:1}
.hero .eyebrow{display:inline-block;font-size:.8rem;font-weight:600;letter-spacing:.12em;color:#a6c5e2;margin-bottom:24px}
.hero h1{font-size:clamp(2.1rem,3.4vw,2.95rem);color:#fff;line-height:1.18;margin-bottom:18px;white-space:nowrap}
.hero h1 em{font-style:normal;color:#e3b577}
.hero-sub{font-size:clamp(1.2rem,1.9vw,1.55rem);color:#d6e2ef;font-weight:600;line-height:1.45;margin-bottom:22px}
.hero-lead{font-size:1.02rem;color:#a9bcce;max-width:25rem;line-height:1.65;margin-bottom:30px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;height:50px;padding:0 26px;border-radius:var(--radius-sm);font-size:.98rem;font-weight:600;transition:.15s;border:1px solid transparent}
.btn-primary{background:var(--gold);color:#fff}
.btn-primary:hover{background:var(--gold-l)}
.btn-ghost{background:transparent;color:#eaf0f6;border-color:rgba(255,255,255,.4)}
.btn-ghost:hover{background:rgba(255,255,255,.1)}
.btn-navy{background:var(--navy);color:#fff}
.btn-navy:hover{background:var(--navy-d)}
.btn-line{background:#fff;color:var(--navy);border-color:var(--line-2)}
.btn-line:hover{border-color:var(--navy)}
.hero-promise{margin-top:20px;display:flex;flex-wrap:wrap;gap:8px 18px;font-size:.86rem;color:#9fb4c8}
.hero-promise span{position:relative;padding-left:18px}
.hero-promise span::before{content:"✓";position:absolute;left:0;color:#e3b577;font-weight:700}
.hero-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius);padding:34px 34px 30px}
.hero-card h3{color:#fff;font-size:1rem;margin-bottom:8px;font-weight:600;letter-spacing:.02em}
.hero-kpis{display:grid;gap:0}
.hero-kpi{padding:20px 0;border-bottom:1px solid rgba(255,255,255,.1)}
.hero-kpi:last-child{border-bottom:0;padding-bottom:0}
.hero-kpi b{display:block;font-size:1.95rem;color:#fff;line-height:1.1}
.hero-kpi span{display:block;font-size:.85rem;color:#a9bcce;margin-top:6px}

/* ---------- 数字背书条 ---------- */
.proofbar{background:var(--bg-2);border-bottom:1px solid var(--line)}
.proofbar-inner{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:28px 0}
.proofbar-item{text-align:center}
.proofbar-item b{display:block;font-size:1.42rem;color:var(--navy)}
.proofbar-item span{display:block;font-size:.85rem;color:var(--soft);margin-top:3px}

/* ---------- 通用区块 ---------- */
.section{padding:80px 0}
.section.alt{background:var(--bg-2)}
.sec-head{max-width:740px;margin:0 auto 48px;text-align:center}
.sec-head.left{margin-left:0;text-align:left}
.eyebrow{font-size:.78rem;font-weight:700;letter-spacing:.14em;color:var(--gold)}
.sec-head h2{font-size:clamp(1.7rem,2.8vw,2.3rem);margin:14px 0 12px}
.sec-head p{color:var(--body);font-size:1.02rem}

/* ---------- 服务矩阵：三懂分层 ---------- */
.matrix{display:grid;gap:24px}
.matrix-block{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.matrix-head{display:flex;align-items:center;gap:18px;padding:26px 32px;border-bottom:1px solid var(--line);background:linear-gradient(180deg,#fbfcfe,#f6f8fb)}
.matrix-ico{flex:none;width:50px;height:50px;border-radius:var(--radius-sm);display:grid;place-items:center;border:1.6px solid var(--navy);color:var(--navy);font-size:1.05rem;font-weight:700;background:#fff}
.matrix-block:nth-child(2) .matrix-ico{border-color:var(--gold);color:var(--gold)}
.matrix-block:nth-child(3) .matrix-ico{border-color:var(--good);color:var(--good)}
.matrix-head h3{font-size:1.3rem;margin-bottom:4px}
.matrix-head p{font-size:.92rem;color:var(--soft)}
.matrix-items{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line)}
.matrix-item{background:#fff;padding:22px 24px;transition:background .15s}
.matrix-item:hover{background:var(--bg-2)}
.matrix-item b{display:block;font-size:1rem;color:var(--ink);margin-bottom:5px}
.matrix-item span{display:block;font-size:.85rem;color:var(--body);line-height:1.55}
.matrix-foot{padding:16px 32px;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
.svc-meta{display:flex;gap:22px;flex-wrap:wrap;font-size:.84rem;color:var(--soft)}
.svc-meta b{color:var(--ink);font-weight:600}
.matrix-foot a{color:var(--navy);font-weight:600;font-size:.92rem;white-space:nowrap}
.matrix-foot a::after{content:" →"}

/* ---------- 体检流程 ---------- */
.flow{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step}
.flow-step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;position:relative}
.flow-step .num{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:50%;background:var(--navy);color:#fff;font-size:.92rem;font-weight:700;margin-bottom:14px}
.flow-step h4{font-size:1.05rem;margin-bottom:6px}
.flow-step p{font-size:.88rem}

/* ---------- 为什么信我 ---------- */
.why-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.why-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:32px;box-shadow:var(--shadow)}
.why-card .n{font-size:.8rem;font-weight:700;color:var(--gold);letter-spacing:.1em}
.why-card h3{font-size:1.16rem;margin:12px 0 8px}
.why-card p{font-size:.92rem}

/* ---------- 关于左右块 ---------- */
.split{display:grid;grid-template-columns:.85fr 1.15fr;gap:54px;align-items:center}
.about-photo{border-radius:var(--radius);overflow:hidden;aspect-ratio:4/5;background:var(--bg-3);box-shadow:var(--shadow)}
.about-photo img{width:100%;height:100%;object-fit:cover}
.about-h2{font-size:clamp(1.5rem,2.4vw,2rem);margin:12px 0 16px}
.about-p{margin-bottom:16px}

/* ---------- CTA ---------- */
.cta-band{background:linear-gradient(118deg,var(--navy-d),var(--navy));color:#eaf0f6;text-align:center;padding:68px 0}
.cta-band h2{color:#fff;font-size:clamp(1.6rem,2.6vw,2.1rem);margin-bottom:14px}
.cta-band p{color:#c5d4e3;margin-bottom:28px}
.cta-band .btn-row{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ---------- 深色多列 footer ---------- */
.site-footer{background:var(--navy-d);color:#aebfce;font-size:.9rem}
.footer-top{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.1fr;gap:40px;padding:56px 0 42px}
.footer-col h4{color:#fff;font-size:.95rem;margin-bottom:16px;font-weight:600}
.footer-col a{display:block;color:#aebfce;padding:5px 0;transition:color .15s}
.footer-col a:hover{color:#fff}
.footer-brand b{display:block;color:#fff;font-size:1.08rem;margin-bottom:10px}
.footer-brand p{color:#8fa3b6;font-size:.88rem;max-width:22rem}
.footer-contact div{margin-bottom:12px}
.footer-contact span{display:block;font-size:.74rem;color:#7990a4;letter-spacing:.06em;text-transform:uppercase}
.footer-contact b{color:#fff;font-size:1.05rem;font-weight:600}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:18px 0;text-align:center;font-size:.82rem;color:#7990a4}

/* ---------- 响应式 ---------- */
@media(max-width:1024px){
  .matrix-items{grid-template-columns:repeat(2,1fr)}
  .flow{grid-template-columns:repeat(2,1fr)}
  .footer-top{grid-template-columns:1fr 1fr;gap:30px}
}
@media(max-width:760px){
  .mainnav{display:none}
  .nav-toggle{display:flex}
  .topbar.open .mainnav{display:flex;position:absolute;top:70px;left:0;right:0;flex-direction:column;align-items:stretch;gap:0;background:#fff;border-bottom:1px solid var(--line);padding:8px 24px 16px;box-shadow:var(--shadow)}
  .topbar.open .mainnav a{padding:13px 0;border-bottom:1px solid var(--bg-3)}
  .topbar.open .mainnav a.active::after{display:none}
  .hero-inner,.split,.why-grid,.matrix-items,.proofbar-inner,.flow{grid-template-columns:1fr}
  .hero-inner{gap:30px;padding:54px 0 58px}
  .hero h1{font-size:1.78rem;line-height:1.3;white-space:normal}
  .hero-lead{font-size:.98rem}
  .proofbar-inner{grid-template-columns:1fr 1fr;gap:22px}
  .matrix-head{padding:20px}
  .matrix-item{padding:18px 20px}
  .matrix-foot{padding:16px 20px}
  .section{padding:54px 0}
  .footer-top{grid-template-columns:1fr;gap:28px}
}

/* ---------- 痛点区（戳痛，第二人称） ---------- */
.pain-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}
.pain-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px 28px;display:flex;gap:16px;align-items:flex-start;box-shadow:var(--shadow)}
.pain-card .x{flex:none;width:30px;height:30px;border-radius:50%;background:#fbeae3;color:#c2683a;display:grid;place-items:center;font-weight:700;font-size:.85rem;margin-top:2px}
.pain-card p{color:var(--body);font-size:1rem;line-height:1.62}
.pain-card p b{color:var(--ink);font-weight:600}
@media(max-width:760px){.pain-grid{grid-template-columns:1fr}}

/* ---------- 内页通用组件 ---------- */
.page-hero{background:linear-gradient(118deg,var(--navy-d),var(--navy));color:#eaf0f6;padding:66px 0 70px;position:relative;overflow:hidden}
.page-hero .eyebrow{color:#a6c5e2}
.page-hero h1{color:#fff;font-size:clamp(1.9rem,3.4vw,2.7rem);margin:14px 0 14px;line-height:1.2}
.page-hero p{color:#c5d4e3;max-width:44rem;font-size:1.05rem}
.page-hero .hero-promise{margin-top:22px}
.cols2{display:grid;grid-template-columns:1fr 1fr;gap:44px;align-items:start}
.panel{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 32px;box-shadow:var(--shadow)}
.panel h3{font-size:1.2rem;margin-bottom:14px}
.dl{display:grid;gap:11px;margin-top:6px;list-style:none}
.dl li{position:relative;padding-left:24px;color:var(--body)}
.dl li::before{content:"✓";position:absolute;left:0;top:1px;color:var(--good);font-weight:700}
.deliver-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.deliver{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px}
.deliver h4{font-size:1.05rem;margin-bottom:6px}
.deliver p{font-size:.9rem}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px;box-shadow:var(--shadow)}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-top:6px}
.field{display:grid;gap:8px}
.field.full{grid-column:1/-1}
.field label{font-size:.88rem;font-weight:600;color:var(--ink)}
input,select,textarea{width:100%;min-height:50px;padding:12px 14px;border:1px solid var(--line-2);border-radius:var(--radius-sm);background:#fff;color:var(--ink);font:inherit}
textarea{min-height:120px;resize:vertical;line-height:1.6}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--navy);box-shadow:0 0 0 3px rgba(22,54,90,.1)}
.form-note{font-size:.85rem;color:var(--soft);margin-top:14px}
.btn-full{width:100%}
@media(max-width:760px){.cols2,.form-grid,.deliver-grid{grid-template-columns:1fr}.page-hero{padding:48px 0 52px}}

/* ---------- 真系统展示（arsenal） ---------- */
.arsenal-group{margin-bottom:0}
.arsenal-group .eyebrow{display:block;margin-bottom:8px}
.arsenal-group h3{font-size:1.4rem;margin:0 0 22px}
.arsenal-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.arsenal-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px;box-shadow:var(--shadow);position:relative}
.arsenal-card strong{display:block;font-size:1.02rem;color:var(--ink);margin-bottom:7px}
.arsenal-card span{display:block;font-size:.88rem;color:var(--body);line-height:1.58}
.arsenal-card .tag{display:inline-block;margin-top:12px;font-size:.72rem;font-weight:600;letter-spacing:.04em;padding:3px 10px;border-radius:999px}
.arsenal-card .tag-live{background:var(--gold-bg);color:var(--gold);border:1px solid #ecd9bc}
@media(max-width:1024px){.arsenal-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:760px){.arsenal-grid{grid-template-columns:1fr}.arsenal-group h3{font-size:1.2rem}}

/* ---------- 系统截图展示 ---------- */
.shots-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(320px,1fr));gap:20px}
.shot{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);background:#fff}
.shot img{width:100%;display:block;aspect-ratio:16/10;object-fit:cover;object-position:top center}
.shot figcaption{padding:13px 18px;font-size:.9rem;color:var(--ink);font-weight:600;border-top:1px solid var(--line)}
.shot figcaption span{display:block;font-weight:400;color:var(--soft);font-size:.82rem;margin-top:3px}
.report-shot{max-width:440px;margin:0 auto;border:1px solid var(--line-2);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-lg)}
.report-shot img{width:100%;display:block}
@media(max-width:760px){.topbar-cta{display:inline-flex;height:40px;padding:0 14px;font-size:.85rem}}