/* 中国物流网 wuliu.org.cn — 全站样式（白色主色 / 明暗双主题 / 三端响应式） */
:root{
  --bg:#ffffff; --bg-soft:#f6f9fd; --surface:#ffffff; --surface-2:#f8fafc; --surface-3:#eef4fb;
  --text:#0f1d33; --text-2:#3d4f68; --muted:#71829c; --border:#e2eaf4; --border-2:#cfdcec;
  --brand:#1565d8; --brand-dark:#0b47a6; --brand-soft:#e8f0ff; --cyan:#0aa7a0; --cyan-soft:#e2f6f3;
  --green:#0d9f6e; --green-soft:#e5f8f0; --amber:#d97706; --amber-soft:#fff3e0; --red:#dc2626; --red-soft:#feecec;
  --purple:#7c3aed; --purple-soft:#f2ebff;
  --shadow:0 8px 30px rgba(20,50,100,.07); --shadow-lg:0 18px 50px rgba(20,50,100,.13);
  --radius:16px; --radius-lg:22px; --maxw:1220px;
  --grid-line:rgba(21,101,216,.055);
}
html[data-theme="dark"]{
  --bg:#080e19; --bg-soft:#0c1423; --surface:#101b2d; --surface-2:#142137; --surface-3:#1b2c46;
  --text:#eaf2ff; --text-2:#b9c9df; --muted:#8296b2; --border:#22334c; --border-2:#2e4463;
  --brand:#6a9cff; --brand-dark:#4a7ce8; --brand-soft:#16294a; --cyan:#3ad3c6; --cyan-soft:#10322f;
  --green:#31d29b; --green-soft:#10342b; --amber:#f5b34c; --amber-soft:#3b2a11; --red:#ff7a7a; --red-soft:#3a1c22;
  --purple:#b18bff; --purple-soft:#2a1e4a;
  --shadow:0 8px 30px rgba(0,0,0,.3); --shadow-lg:0 18px 50px rgba(0,0,0,.45);
  --grid-line:rgba(120,170,255,.07);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--text);font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;font-size:15px;line-height:1.65;-webkit-font-smoothing:antialiased;transition:background .28s,color .28s}
body.no-scroll{overflow:hidden}
a{color:inherit;text-decoration:none}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
svg{width:100%;height:100%;display:block}
::selection{background:var(--brand);color:#fff}
:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-thumb{background:var(--border-2);border-radius:9px}
::-webkit-scrollbar-track{background:transparent}

/* 背景装饰 */
.bg-grid{position:fixed;inset:0;z-index:-3;pointer-events:none;background-image:linear-gradient(var(--grid-line) 1px,transparent 1px),linear-gradient(90deg,var(--grid-line) 1px,transparent 1px);background-size:46px 46px;mask-image:linear-gradient(to bottom,#000 0,transparent 85%)}
.bg-glow{position:fixed;z-index:-2;pointer-events:none;border-radius:50%;filter:blur(90px);opacity:.5}
.bg-glow-a{width:520px;height:520px;top:-180px;left:-120px;background:radial-gradient(circle,rgba(21,101,216,.22),transparent 70%)}
.bg-glow-b{width:480px;height:480px;top:280px;right:-190px;background:radial-gradient(circle,rgba(10,167,160,.18),transparent 70%)}
html[data-theme="dark"] .bg-glow{opacity:.42}

.wrap{width:min(var(--maxw),calc(100% - 40px));margin:0 auto}
.site-main{min-height:60vh;padding-top:76px}
.section{padding:64px 0}
.section.tight{padding:40px 0}
.section.alt{background:var(--bg-soft);border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.eyebrow{display:inline-flex;align-items:center;gap:7px;font-size:12px;font-weight:700;letter-spacing:.12em;color:var(--brand);background:var(--brand-soft);border:1px solid var(--border);border-radius:100px;padding:5px 13px;text-transform:uppercase}
.eyebrow::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--cyan);box-shadow:0 0 0 4px var(--cyan-soft)}
h1,h2,h3,h4{line-height:1.25;margin:0;font-weight:750;letter-spacing:-.01em}
h1{font-size:clamp(32px,4.6vw,58px)}
h2{font-size:clamp(25px,3vw,38px)}
h3{font-size:19px}
p{margin:0}
.section-head{margin-bottom:34px;max-width:820px}
.section-head h2{margin:14px 0 12px}
.section-head p{color:var(--text-2);font-size:16px}
.section-head.center{text-align:center;margin-left:auto;margin-right:auto}
.section-head.center .eyebrow{margin:0 auto}
.muted{color:var(--muted)}
.small{font-size:13px}
.tiny{font-size:12px}
.strong{font-weight:700}
.grad-text{background:linear-gradient(100deg,var(--brand),var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:1px solid transparent;border-radius:11px;padding:11px 20px;font-weight:650;font-size:14px;transition:.2s;white-space:nowrap;background:transparent}
.btn svg{width:17px;height:17px;flex:none}
.btn-primary{background:linear-gradient(120deg,var(--brand),#3b82f6);color:#fff;box-shadow:0 6px 18px rgba(37,99,235,.25)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(37,99,235,.34)}
.btn-ghost{border-color:var(--border-2);background:var(--surface);color:var(--text-2)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-soft{background:var(--brand-soft);color:var(--brand);border-color:var(--border)}
.btn-soft:hover{background:var(--brand);color:#fff}
.btn-sm{padding:8px 14px;font-size:13px;border-radius:9px}
.btn-lg{padding:14px 26px;font-size:15px;border-radius:13px}
.btn-block{width:100%}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none!important}
.icon-btn{width:36px;height:36px;border:1px solid var(--border);background:var(--surface);color:var(--text-2);border-radius:10px;display:inline-flex;align-items:center;justify-content:center;padding:8px;transition:.2s}
.icon-btn:hover{border-color:var(--brand);color:var(--brand)}
.icon-btn svg{width:19px;height:19px}
.link-btn{border:none;background:none;color:var(--brand);font-weight:650;padding:0;font-size:13px}
.link-btn:hover{text-decoration:underline}

/* 卡片 / 网格 */
.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,minmax(0,1fr))}
.g3{grid-template-columns:repeat(3,minmax(0,1fr))}
.g4{grid-template-columns:repeat(4,minmax(0,1fr))}
.g5{grid-template-columns:repeat(5,minmax(0,1fr))}
.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);transition:.22s;position:relative;overflow:hidden}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg);border-color:var(--border-2)}
.card.pad-sm{padding:16px}
.card.flat{box-shadow:none}
.card-head{display:flex;align-items:flex-start;gap:12px;margin-bottom:12px}
.icon-tile{width:42px;height:42px;flex:none;border-radius:12px;display:flex;align-items:center;justify-content:center;background:var(--brand-soft);color:var(--brand)}
.icon-tile svg{width:22px;height:22px}
.icon-tile.cyan{background:var(--cyan-soft);color:var(--cyan)}
.icon-tile.green{background:var(--green-soft);color:var(--green)}
.icon-tile.amber{background:var(--amber-soft);color:var(--amber)}
.icon-tile.red{background:var(--red-soft);color:var(--red)}
.icon-tile.purple{background:var(--purple-soft);color:var(--purple)}
.tag{display:inline-flex;align-items:center;gap:5px;font-size:11.5px;font-weight:650;padding:3px 9px;border-radius:100px;background:var(--surface-3);color:var(--text-2);border:1px solid var(--border)}
.tag.blue{background:var(--brand-soft);color:var(--brand);border-color:transparent}
.tag.cyan{background:var(--cyan-soft);color:var(--cyan);border-color:transparent}
.tag.green{background:var(--green-soft);color:var(--green);border-color:transparent}
.tag.amber{background:var(--amber-soft);color:var(--amber);border-color:transparent}
.tag.red{background:var(--red-soft);color:var(--red);border-color:transparent}
.tag.purple{background:var(--purple-soft);color:var(--purple);border-color:transparent}
.divider{height:1px;background:var(--border);margin:18px 0}
.row{display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.row.between{justify-content:space-between}
.stack{display:flex;flex-direction:column;gap:10px}
.list-clean{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:9px}
.list-clean li{display:flex;gap:9px;color:var(--text-2);font-size:14px;line-height:1.55}
.list-clean li::before{content:"";width:6px;height:6px;flex:none;margin-top:8px;border-radius:50%;background:var(--cyan)}
.check-list li::before{content:"✓";width:auto;height:auto;margin-top:0;color:var(--green);background:none;font-weight:800}

/* Header */
.site-header{position:fixed;top:0;left:0;right:0;z-index:60;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}
.header-inner{width:min(var(--maxw),calc(100% - 40px));margin:0 auto;height:72px;display:flex;align-items:center;gap:18px}
.brand{display:inline-flex;align-items:center;gap:10px;flex:none}
.brand-mark{width:38px;height:38px;display:block;flex:none}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-text strong{font-size:17px;letter-spacing:.02em}
.brand-text small{font-size:10.5px;color:var(--muted);letter-spacing:.06em}
.main-nav{display:flex;align-items:center;gap:2px;margin-left:auto;flex-wrap:nowrap;overflow:hidden}
.main-nav a{font-size:13.5px;font-weight:600;color:var(--text-2);padding:8px 11px;border-radius:9px;white-space:nowrap;transition:.18s}
.main-nav a:hover{color:var(--brand);background:var(--brand-soft)}
.main-nav a.active{color:var(--brand);background:var(--brand-soft)}
.header-actions{display:flex;align-items:center;gap:9px;flex:none}
.theme-switch{display:flex;background:var(--surface-2);border:1px solid var(--border);border-radius:11px;padding:3px;gap:2px;flex:none}
.theme-btn{width:32px;height:32px;padding:0;display:inline-flex;align-items:center;justify-content:center;border:0;background:transparent;color:var(--muted);border-radius:8px;transition:.2s;flex:none}
.theme-btn svg{width:17px;height:17px}
.theme-btn span{display:none}
.theme-btn:hover{color:var(--brand)}
.theme-btn.active{background:var(--surface);color:var(--brand);box-shadow:0 2px 8px rgba(20,50,100,.1)}
.menu-trigger{display:none}
.mobile-nav{display:none}
.header-cta{display:inline-flex}

/* 搜索 */
.search-overlay{position:fixed;inset:0;z-index:90;background:rgba(9,20,38,.5);backdrop-filter:blur(5px);padding:90px 20px 20px;display:none;justify-content:center;align-items:flex-start}
.search-overlay.open{display:flex}
.search-box{width:min(760px,100%);background:var(--surface);border:1px solid var(--border);border-radius:18px;box-shadow:var(--shadow-lg);overflow:hidden;animation:pop .2s ease}
@keyframes pop{from{opacity:0;transform:translateY(-8px)}to{opacity:1;transform:none}}
.search-input-row{display:flex;align-items:center;gap:12px;padding:16px 18px;border-bottom:1px solid var(--border)}
.search-input-row svg{width:21px;height:21px;color:var(--brand);flex:none}
.search-input-row input{flex:1;border:0;background:transparent;outline:none;font-size:16px;min-width:0}
.search-input-row input::placeholder{color:var(--muted)}
.search-input-row kbd{font-size:11px;color:var(--muted);border:1px solid var(--border);border-radius:6px;padding:2px 7px;background:var(--surface-2)}
.search-tags{display:flex;gap:7px;flex-wrap:wrap;padding:12px 18px;border-bottom:1px solid var(--border)}
.search-tags button{border:1px solid var(--border);background:var(--surface-2);color:var(--text-2);border-radius:100px;font-size:12px;padding:4px 11px}
.search-tags button:hover{border-color:var(--brand);color:var(--brand)}
.search-results{max-height:min(56vh,520px);overflow:auto;padding:10px}
.search-hint{padding:14px;color:var(--muted);font-size:13px;text-align:center}
.sr-item{display:flex;align-items:center;gap:12px;width:100%;text-align:left;border:0;background:transparent;padding:11px 12px;border-radius:11px;transition:.15s}
.sr-item:hover{background:var(--surface-2)}
.sr-ico{width:34px;height:34px;border-radius:9px;background:var(--brand-soft);color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:15px;flex:none}
.sr-text{flex:1;min-width:0}
.sr-text strong{display:block;font-size:14px}
.sr-text small{display:block;color:var(--muted);font-size:12px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sr-item .tag{flex:none}
mark{background:var(--amber-soft);color:var(--amber);border-radius:3px;padding:0 2px}

/* Hero */
.hero{position:relative;padding:70px 0 60px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;gap:44px;align-items:center}
.hero h1{margin:18px 0 18px}
.hero-lead{font-size:17px;color:var(--text-2);max-width:610px;margin-bottom:26px}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:30px}
.hero-stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;border-top:1px solid var(--border);padding-top:22px}
.hero-stat strong{display:block;font-size:24px;font-weight:800;color:var(--brand);letter-spacing:-.02em}
.hero-stat small{display:block;color:var(--muted);font-size:12px;margin-top:2px}
.hero-visual{position:relative;min-height:430px;display:flex;align-items:center;justify-content:center}
.ai-orbit{position:relative;width:min(100%,420px);aspect-ratio:1}
.ai-core{position:absolute;inset:31%;border-radius:50%;background:linear-gradient(140deg,var(--brand),var(--cyan));box-shadow:0 0 60px rgba(37,99,235,.35),inset 0 0 30px rgba(255,255,255,.25);display:flex;flex-direction:column;align-items:center;justify-content:center;color:#fff;text-align:center;animation:float 5s ease-in-out infinite}
.ai-core b{font-size:20px;letter-spacing:.05em}
.ai-core span{font-size:11.5px;opacity:1;color:#fff;text-shadow:0 1px 3px rgba(0,0,0,.28)}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}
.ai-ring{position:absolute;border-radius:50%;border:1px dashed var(--border-2);animation:spin 34s linear infinite}
.ai-ring.r1{inset:12%}.ai-ring.r2{inset:22%;animation-direction:reverse;animation-duration:26s}.ai-ring.r3{inset:3%;border-style:solid;opacity:.5;animation-duration:48s}
@keyframes spin{to{transform:rotate(360deg)}}
.ai-node{position:absolute;width:86px;padding:9px 6px;background:var(--surface);border:1px solid var(--border);border-radius:12px;box-shadow:var(--shadow);text-align:center;font-size:11px;font-weight:650;color:var(--text-2);transform:translate(-50%,-50%);transition:.25s}
.ai-node:hover{transform:translate(-50%,-50%) scale(1.08);border-color:var(--brand);color:var(--brand)}
.ai-node i{display:block;font-style:normal;font-size:17px;margin-bottom:2px}
.ai-node.n1{left:50%;top:3%}.ai-node.n2{left:91%;top:27%}.ai-node.n3{left:91%;top:73%}.ai-node.n4{left:50%;top:84%}.ai-node.n5{left:9%;top:73%}.ai-node.n6{left:9%;top:27%}
.hero-float{position:absolute;bottom:0;left:6px;right:6px;display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.hero-float span{background:var(--surface);border:1px solid var(--border);border-radius:100px;padding:6px 12px;font-size:11.5px;color:var(--text-2);box-shadow:var(--shadow)}

/* 通用组件 */
.notice{border-left:3px solid var(--brand);background:var(--brand-soft);border-radius:0 12px 12px 0;padding:14px 18px;color:var(--text-2);font-size:14px}
.notice.warn{border-color:var(--amber);background:var(--amber-soft)}
.notice.ok{border-color:var(--green);background:var(--green-soft)}
.kpi{background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:18px}
.kpi small{color:var(--muted);font-size:12px;display:block}
.kpi strong{display:block;font-size:27px;font-weight:800;letter-spacing:-.02em;margin:4px 0 2px}
.kpi em{font-style:normal;font-size:11.5px;color:var(--green)}
.bar{height:8px;border-radius:100px;background:var(--surface-3);overflow:hidden}
.bar>i{display:block;height:100%;border-radius:100px;background:linear-gradient(90deg,var(--brand),var(--cyan));transition:width .5s}
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:14px;background:var(--surface)}
table{width:100%;border-collapse:collapse;font-size:13.5px;min-width:640px}
th,td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--border);vertical-align:top}
th{background:var(--surface-2);font-weight:700;color:var(--text-2);font-size:12.5px;white-space:nowrap}
tr:last-child td{border-bottom:0}
tbody tr:hover{background:var(--surface-2)}
.pill-nav{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:22px}
.pill-nav button{border:1px solid var(--border);background:var(--surface);color:var(--text-2);padding:8px 15px;border-radius:100px;font-size:13px;font-weight:600;transition:.18s}
.pill-nav button:hover{border-color:var(--brand)}
.pill-nav button.active{background:var(--brand);color:#fff;border-color:var(--brand);box-shadow:0 5px 14px rgba(21,101,216,.22)}
.field{display:flex;flex-direction:column;gap:6px;margin-bottom:14px}
.field label{font-size:12.5px;font-weight:650;color:var(--text-2)}
.field input,.field select,.field textarea{width:100%;border:1px solid var(--border-2);background:var(--surface);border-radius:10px;padding:10px 12px;outline:none;font-size:14px;transition:.18s}
.field input:focus,.field select:focus,.field textarea:focus{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.field textarea{resize:vertical;min-height:88px}
.field-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:0 14px}
.form-row{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.result-box{margin-top:16px;background:var(--surface-2);border:1px dashed var(--border-2);border-radius:13px;padding:16px;min-height:76px}
.result-box .empty{color:var(--muted);font-size:13px;text-align:center;padding:12px}
.result-line{display:flex;justify-content:space-between;gap:10px;padding:7px 0;border-bottom:1px dashed var(--border);font-size:13.5px}
.result-line:last-child{border-bottom:0}
.result-line b{font-weight:750}
.big-number{font-size:30px;font-weight:800;color:var(--brand);letter-spacing:-.02em}
.seg{display:inline-flex;background:var(--surface-2);border:1px solid var(--border);padding:3px;border-radius:11px;gap:2px;flex-wrap:wrap}
.seg button{border:0;background:transparent;color:var(--muted);font-size:12.5px;font-weight:650;padding:6px 12px;border-radius:8px}
.seg button.active{background:var(--surface);color:var(--brand);box-shadow:0 2px 8px rgba(20,50,100,.1)}
.accordion{border:1px solid var(--border);border-radius:14px;background:var(--surface);overflow:hidden;margin-bottom:12px}
.acc-head{width:100%;display:flex;align-items:center;gap:12px;text-align:left;background:transparent;border:0;padding:16px 18px;font-weight:700;font-size:15px}
.acc-head:hover{background:var(--surface-2)}
.acc-head .chev{margin-left:auto;color:var(--muted);transition:.2s;width:18px;height:18px;flex:none}
.accordion.open .chev{transform:rotate(180deg)}
.acc-body{display:none;padding:0 18px 18px;border-top:1px solid var(--border);color:var(--text-2);font-size:14px}
.accordion.open .acc-body{display:block}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.pro-con{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:14px}
.pro-con>div{border-radius:12px;padding:14px;font-size:13px}
.pro{background:var(--green-soft);color:var(--text-2)}
.con{background:var(--red-soft);color:var(--text-2)}
.pro h4,.con h4{font-size:13px;margin-bottom:8px}
.pro h4{color:var(--green)}.con h4{color:var(--red)}
.metric-line{display:flex;align-items:center;gap:10px;font-size:13px;margin:9px 0}
.metric-line .bar{flex:1;height:7px}

/* 产业链：上中下游严格同一行 */
.chain-rail{display:grid;grid-template-columns:minmax(0,1fr) 26px minmax(0,1fr) 26px minmax(0,1fr);gap:8px;align-items:center;margin-bottom:22px}
.chain-rail-step{display:flex;align-items:center;gap:10px;text-align:left;border:1px solid var(--border);background:var(--surface);border-radius:12px;padding:8px 12px;min-width:0;transition:.2s}
.chain-rail-step:hover{border-color:var(--brand);transform:translateY(-2px)}
.chain-rail-step.on{border-color:var(--brand);background:var(--brand-soft)}
.chain-rail-step i{font-style:normal;width:26px;height:26px;flex:none;border-radius:8px;background:var(--purple);color:#fff;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800}
.chain-rail-step.mid i{background:var(--brand)}
.chain-rail-step.down i{background:var(--cyan)}
.chain-rail-step span{min-width:0}
.chain-rail-step b{display:block;font-size:13.5px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chain-rail-step small{display:block;color:var(--muted);font-size:11px;margin-top:1px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.chain-rail > em{font-style:normal;text-align:center;color:var(--brand);font-size:19px;font-weight:800}
.chain-flow{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;align-items:start}
.chain-flow[data-single="1"]{grid-template-columns:minmax(0,560px);justify-content:center}
.chain-col{position:relative;min-width:0;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;box-shadow:var(--shadow)}
.chain-col:not(:last-child)::after{content:"→";position:absolute;right:-21px;top:20px;width:22px;height:22px;display:flex;align-items:center;justify-content:center;color:var(--brand);font-size:18px;font-weight:800;z-index:2}
.chain-flow[data-single="1"] .chain-col:not(:last-child)::after{display:none}
.chain-col h3{display:flex;align-items:center;gap:10px;font-size:16px;margin-bottom:6px;line-height:1.4;flex-wrap:wrap}
.chain-col .chain-num{width:28px;height:28px;flex:none;border-radius:9px;background:var(--brand);color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800}
.chain-col.up .chain-num{background:var(--purple)}
.chain-col.mid .chain-num{background:var(--brand)}
.chain-col.down .chain-num{background:var(--cyan)}
.chain-col>p{color:var(--muted);font-size:12.5px;margin-bottom:16px}
.chain-item{border:1px solid var(--border);border-radius:12px;padding:12px;margin-bottom:10px;background:var(--surface-2);cursor:pointer;transition:.2s}
.chain-item:last-child{margin-bottom:0}
.chain-item:hover{border-color:var(--brand);transform:translateX(3px)}
.chain-item.active{border-color:var(--brand);background:var(--brand-soft)}
.chain-item b{font-size:13.5px;display:flex;justify-content:space-between;align-items:center;gap:6px;flex-wrap:wrap}
.chain-item b .tag{font-size:10.5px;padding:2px 7px;white-space:nowrap}
.chain-item small{display:block;color:var(--muted);font-size:11.5px;margin-top:4px;line-height:1.5}
.chain-detail{margin-top:20px}

/* 工具 / 产品 */
.tool-card{cursor:pointer}
.tool-card:hover .tool-go{opacity:1;transform:translateX(0)}
.tool-go{opacity:0;transform:translateX(-6px);transition:.2s;color:var(--brand);font-size:12.5px;font-weight:700;display:inline-flex;align-items:center;gap:4px;margin-top:10px}
.tool-card .tool-num{position:absolute;right:16px;top:12px;font-size:34px;font-weight:800;color:var(--surface-3);line-height:1}
html[data-theme="dark"] .tool-card .tool-num{color:var(--surface-3);opacity:.5}
.tool-modal-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 18px}

/* 角色工作台 / 供需大厅 */
.dash{display:grid;grid-template-columns:240px 1fr;gap:20px;align-items:start}
.dash-side{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:18px;position:sticky;top:92px}
.dash-side .side-title{font-size:12px;color:var(--muted);font-weight:700;letter-spacing:.1em;margin:14px 0 8px}
.dash-side button{width:100%;text-align:left;border:0;background:transparent;padding:9px 11px;border-radius:9px;font-size:13.5px;color:var(--text-2);font-weight:600;display:flex;align-items:center;gap:9px}
.dash-side button.active{background:var(--brand-soft);color:var(--brand)}
.dash-side button:hover{background:var(--surface-2)}
.dash-main{min-width:0}
.order-row{display:flex;align-items:center;gap:14px;border:1px solid var(--border);border-radius:13px;padding:13px 15px;margin-bottom:10px;background:var(--surface);flex-wrap:wrap}
.order-row .o-main{flex:1;min-width:180px}
.order-row .o-main b{font-size:14px;display:block}
.order-row .o-main small{color:var(--muted);font-size:12px}
.order-row .o-price{font-weight:800;color:var(--brand);font-size:17px}
.status-dot{width:7px;height:7px;border-radius:50%;display:inline-block;margin-right:6px;background:var(--green)}
.status-dot.gray{background:var(--muted)}.status-dot.amber{background:var(--amber)}
.trip-card{border:1px solid var(--border);border-radius:14px;padding:16px;background:var(--surface);margin-bottom:12px;cursor:pointer;transition:.2s}
.trip-card:hover,.trip-card.selected{border-color:var(--brand);box-shadow:var(--shadow)}
.trip-card.selected{background:var(--brand-soft)}
.trip-meta{display:flex;gap:14px;flex-wrap:wrap;font-size:12.5px;color:var(--muted);margin-top:8px}
.step-flow{display:flex;align-items:center;gap:0;flex-wrap:wrap;margin:16px 0}
.step-flow .step{display:flex;align-items:center;gap:8px;font-size:12.5px;color:var(--muted)}
.step-flow .step b{width:24px;height:24px;border-radius:50%;background:var(--surface-3);color:var(--muted);display:flex;align-items:center;justify-content:center;font-size:11px}
.step-flow .step.done b{background:var(--green);color:#fff}
.step-flow .step.done{color:var(--text)}
.step-flow .line{width:36px;height:1px;background:var(--border-2);margin:0 8px}
.market-item{border:1px solid var(--border);border-radius:14px;padding:17px;background:var(--surface);transition:.2s}
.market-item:hover{border-color:var(--brand);box-shadow:var(--shadow)}
.market-item .m-title{font-size:15.5px;font-weight:700;margin:8px 0 6px}
.market-item .m-desc{font-size:13px;color:var(--text-2);margin-bottom:12px;min-height:38px}
.empty-state{text-align:center;padding:48px 20px;color:var(--muted);border:1px dashed var(--border-2);border-radius:14px}
.empty-state b{display:block;color:var(--text-2);font-size:16px;margin-bottom:6px}

/* 商业模式 */
.price-card{display:flex;flex-direction:column;height:100%}
.price-card.featured{border:2px solid var(--brand);box-shadow:0 12px 36px rgba(37,99,235,.16)}
.price-card .price{font-size:36px;font-weight:800;letter-spacing:-.03em;margin:8px 0 2px}
.price-card .price span{font-size:14px;font-weight:600;color:var(--muted)}
.price-card ul{margin:18px 0;flex:1}
.revenue-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.revenue-item{text-align:center;background:var(--surface);border:1px solid var(--border);border-radius:14px;padding:18px}
.revenue-item strong{display:block;font-size:22px;color:var(--brand);font-weight:800}
.revenue-item small{color:var(--muted);font-size:12px}

/* 小程序模拟器 */
.mini-layout{display:grid;grid-template-columns:.9fr 1.1fr;gap:36px;align-items:center}
.phone{width:300px;height:610px;margin:0 auto;background:var(--surface);border:9px solid #16233a;border-radius:42px;box-shadow:0 24px 60px rgba(10,30,70,.24);position:relative;overflow:hidden;display:flex;flex-direction:column}
html[data-theme="dark"] .phone{border-color:#2b3d5c}
.phone-notch{position:absolute;top:0;left:50%;transform:translateX(-50%);width:110px;height:20px;background:#16233a;border-radius:0 0 14px 14px;z-index:3}
.phone-bar{height:38px;padding:12px 16px 4px;display:flex;justify-content:space-between;font-size:10px;color:var(--muted);flex:none}
.phone-title{padding:6px 16px 10px;font-size:16px;font-weight:750;flex:none;display:flex;justify-content:space-between;align-items:center}
.phone-title small{font-size:10px;color:var(--muted);font-weight:600}
.phone-body{flex:1;overflow:auto;padding:0 14px 14px;background:var(--bg-soft)}
.phone-tabbar{height:56px;flex:none;display:flex;border-top:1px solid var(--border);background:var(--surface)}
.phone-tabbar button{flex:1;border:0;background:transparent;color:var(--muted);font-size:10px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:2px;padding:0}
.phone-tabbar button i{font-style:normal;font-size:17px;line-height:1}
.phone-tabbar button.active{color:var(--brand);font-weight:700}
.mp-hero{background:linear-gradient(130deg,var(--brand),var(--cyan));border-radius:16px;padding:16px;color:#fff;margin-bottom:12px}
.mp-hero b{font-size:16px;display:block}.mp-hero small{font-size:10.5px;opacity:.9}
.mp-cards{display:grid;grid-template-columns:repeat(2,1fr);gap:9px;margin-bottom:12px}
.mp-card{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:11px;font-size:11px;text-align:center;color:var(--text-2)}
.mp-card i{font-style:normal;font-size:20px;display:block;margin-bottom:3px}
.mp-card b{display:block;font-size:11.5px;color:var(--text)}
.mp-row{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:11px;margin-bottom:9px;font-size:11px;color:var(--text-2)}
.mp-row b{color:var(--text);font-size:12px;display:block}
.mp-btn{display:block;width:100%;border:0;border-radius:10px;background:var(--brand);color:#fff;font-size:11.5px;font-weight:700;padding:9px;margin-top:8px}
.mp-stat{display:grid;grid-template-columns:repeat(2,1fr);gap:9px;margin-bottom:12px}
.mp-stat div{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:11px}
.mp-stat strong{display:block;font-size:17px;color:var(--brand)}
.mp-stat small{font-size:10px;color:var(--muted)}
.mp-chat{display:flex;flex-direction:column;gap:8px;margin-bottom:10px}
.mp-bubble{max-width:86%;padding:9px 11px;border-radius:12px;font-size:11px;line-height:1.5;background:var(--surface);border:1px solid var(--border)}
.mp-bubble.me{align-self:flex-end;background:var(--brand);color:#fff;border-color:transparent}
.qr-box{width:172px;height:172px;margin:0 auto 14px;background:#fff;border:1px solid var(--border);border-radius:14px;padding:10px;display:grid;grid-template-columns:repeat(12,1fr);grid-template-rows:repeat(12,1fr);gap:1px}
.qr-box i{background:#0f1d33;border-radius:1px}
.qr-box i.w{background:#fff}

/* Footer */
.site-footer{background:var(--surface-2);border-top:1px solid var(--border);margin-top:40px}
.footer-inner{width:min(var(--maxw),calc(100% - 40px));margin:0 auto;display:grid;grid-template-columns:1.05fr 1.55fr 1.05fr;gap:36px;padding:52px 0 34px;align-items:start}
.footer-brand p{color:var(--text-2);font-size:13.5px;margin:16px 0;max-width:430px}
.footer-badges{display:flex;gap:7px;flex-wrap:wrap}
.footer-badges span{font-size:11px;color:var(--muted);border:1px solid var(--border);border-radius:100px;padding:4px 10px}
.footer-links{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px 18px}
.footer-links h4{font-size:13px;margin-bottom:12px}
.footer-links a{display:block;font-size:12.5px;color:var(--muted);padding:4px 0}
.footer-links a:hover{color:var(--brand)}
.footer-contact h4{font-size:13px;margin-bottom:14px}
.footer-hotline{display:flex;align-items:center;gap:11px;border:1px solid var(--border-2);background:var(--surface);border-radius:13px;padding:11px 13px;transition:.2s}
.footer-hotline:hover{border-color:var(--brand);transform:translateY(-2px)}
.hotline-ico{width:34px;height:34px;flex:none;border-radius:10px;background:var(--brand-soft);color:var(--brand);display:flex;align-items:center;justify-content:center;font-size:18px}
.footer-hotline small{display:block;color:var(--muted);font-size:11px}
.footer-hotline strong{display:block;font-size:18px;font-weight:800;letter-spacing:.01em;color:var(--brand);line-height:1.3}
.footer-mail{font-size:12px;color:var(--muted);margin:12px 0 14px;line-height:1.9}
.footer-mail a{color:var(--text-2)}
.footer-mail a:hover{color:var(--brand)}
.qr-pair{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
.qr-item{border:1px solid var(--border);background:var(--surface);border-radius:12px;padding:9px 8px 10px;text-align:center;transition:.2s}
.qr-item:hover{border-color:var(--brand);transform:translateY(-2px);box-shadow:var(--shadow)}
.qr-item img{display:block;width:100%;max-width:108px;aspect-ratio:1;object-fit:contain;margin:0 auto 7px;background:#fff;border-radius:6px}
.qr-item b{display:block;font-size:12px}
.qr-item small{display:block;font-size:10px;color:var(--muted);margin-top:2px;line-height:1.4}
.qr-zoom{text-align:center}
.qr-zoom img{display:block;width:min(320px,100%);aspect-ratio:1;object-fit:contain;margin:0 auto;background:#fff;border:1px solid var(--border);border-radius:14px;padding:10px}
.footer-bottom{width:min(var(--maxw),calc(100% - 40px));margin:0 auto;border-top:1px solid var(--border);padding:16px 0 26px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;color:var(--muted);font-size:11.5px}

/* AI 助手 / 弹窗 / Toast */
.ai-fab{position:fixed;right:24px;bottom:24px;z-index:70;display:flex;align-items:center;gap:9px;background:linear-gradient(120deg,var(--brand),var(--cyan));color:#fff;border:0;border-radius:100px;padding:12px 18px;font-weight:700;font-size:13.5px;box-shadow:0 10px 28px rgba(37,99,235,.35)}
.ai-fab svg{width:20px;height:20px}
.ai-fab:hover{transform:translateY(-3px)}
.ai-fab-pulse{position:absolute;inset:-4px;border-radius:100px;border:2px solid var(--cyan);opacity:.5;animation:pulse 2.4s infinite}
@keyframes pulse{0%{transform:scale(1);opacity:.5}100%{transform:scale(1.17);opacity:0}}
.ai-panel{position:fixed;right:24px;bottom:88px;width:min(380px,calc(100vw - 32px));height:min(540px,calc(100vh - 130px));z-index:80;background:var(--surface);border:1px solid var(--border);border-radius:20px;box-shadow:var(--shadow-lg);display:none;flex-direction:column;overflow:hidden}
.ai-panel.open{display:flex;animation:pop .2s ease}
.ai-panel-head{display:flex;align-items:center;gap:11px;padding:14px 15px;border-bottom:1px solid var(--border);background:linear-gradient(110deg,var(--brand-soft),var(--cyan-soft))}
.ai-avatar{width:36px;height:36px;border-radius:11px;background:linear-gradient(130deg,var(--brand),var(--cyan));color:#fff;padding:8px;flex:none}
.ai-panel-head strong{display:block;font-size:14px}.ai-panel-head small{display:block;color:var(--muted);font-size:11px}
.ai-panel-head .icon-btn{margin-left:auto;background:var(--surface)}
.ai-panel-body{flex:1;overflow:auto;padding:16px;display:flex;flex-direction:column;gap:11px}
.msg{max-width:88%;padding:10px 13px;border-radius:14px;font-size:13px;line-height:1.6;white-space:pre-wrap}
.msg.bot{align-self:flex-start;background:var(--surface-2);border:1px solid var(--border);border-bottom-left-radius:4px}
.msg.me{align-self:flex-end;background:var(--brand);color:#fff;border-bottom-right-radius:4px}
.msg b{font-weight:700}
.ai-quick{display:flex;gap:6px;flex-wrap:wrap;padding:0 14px 10px}
.ai-quick button{border:1px solid var(--border);background:var(--surface-2);color:var(--text-2);border-radius:100px;font-size:11.5px;padding:5px 10px}
.ai-quick button:hover{border-color:var(--brand);color:var(--brand)}
.ai-panel-foot{display:flex;gap:8px;padding:12px;border-top:1px solid var(--border)}
.ai-panel-foot input{flex:1;border:1px solid var(--border-2);background:var(--surface-2);border-radius:10px;padding:9px 12px;outline:none;font-size:13px;min-width:0}
.ai-panel-foot input:focus{border-color:var(--brand)}
.ai-panel-foot button{width:40px;flex:none;border:0;border-radius:10px;background:var(--brand);color:#fff;padding:10px}
.modal-mask{position:fixed;inset:0;z-index:100;background:rgba(9,20,38,.55);backdrop-filter:blur(4px);display:flex;align-items:center;justify-content:center;padding:20px;animation:fade .18s ease}
@keyframes fade{from{opacity:0}to{opacity:1}}
.modal{width:min(720px,100%);max-height:min(86vh,820px);overflow:auto;background:var(--surface);border:1px solid var(--border);border-radius:20px;box-shadow:var(--shadow-lg);animation:pop .22s ease}
.modal.wide{width:min(940px,100%)}
.modal-head{display:flex;align-items:flex-start;gap:12px;padding:20px 22px;border-bottom:1px solid var(--border);position:sticky;top:0;background:var(--surface);z-index:2}
.modal-head h3{font-size:18px}
.modal-head p{color:var(--muted);font-size:12.5px;margin-top:3px}
.modal-head .icon-btn{margin-left:auto}
.modal-body{padding:22px}
.modal-foot{padding:16px 22px;border-top:1px solid var(--border);display:flex;justify-content:flex-end;gap:10px;flex-wrap:wrap}
.toast-root{position:fixed;top:88px;left:50%;transform:translateX(-50%);z-index:120;display:flex;flex-direction:column;gap:8px;align-items:center;pointer-events:none}
.toast{background:var(--text);color:var(--bg);padding:10px 18px;border-radius:100px;font-size:13px;font-weight:600;box-shadow:var(--shadow-lg);animation:pop .2s ease;white-space:nowrap}
html[data-theme="dark"] .toast{background:#dbe9ff;color:#0b1524}
.mobile-tabbar{display:none}

/* 趋势时间轴 */
.timeline{position:relative;padding-left:28px}
.timeline::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:linear-gradient(var(--brand),var(--cyan))}
.tl-item{position:relative;margin-bottom:22px}
.tl-item::before{content:"";position:absolute;left:-27px;top:5px;width:12px;height:12px;border-radius:50%;background:var(--surface);border:3px solid var(--brand)}
.tl-item b{color:var(--brand);font-size:13px;letter-spacing:.04em}
.tl-item h4{margin:4px 0 6px;font-size:16px}
.tl-item p{color:var(--text-2);font-size:13.5px}

/* 适老 / 无障碍模式 */
body.care-mode{font-size:18px;line-height:1.8}
body.care-mode .small,body.care-mode .muted,body.care-mode .card p,body.care-mode .list-clean li{font-size:16px}
body.care-mode .tiny,body.care-mode .tag{font-size:14px}
body.care-mode .btn{font-size:17px;padding:14px 24px}
body.care-mode .main-nav a,body.care-mode .mobile-nav a{font-size:17px}
body.care-mode input,body.care-mode select,body.care-mode textarea{font-size:17px;padding:13px 14px}

/* 打印 */
@media print{.site-header,.ai-fab,.ai-panel,.mobile-tabbar,.bg-grid,.bg-glow{display:none!important}.site-main{padding-top:0}}

/* 响应式 */
/* 1121–1520px：10 个导航标题必须全部显示，压缩间距、收起顶部 CTA 腾空间 */
@media (max-width:1520px){
  .header-inner{gap:12px}
  .main-nav{gap:1px}
  .main-nav a{padding:7px 8px;font-size:12.5px}
  .header-cta{display:none}
}
@media (max-width:1180px){
  .main-nav a{padding:8px 7px;font-size:12.5px}
  .header-cta{display:none}
  .g5{grid-template-columns:repeat(3,1fr)}
  .revenue-grid{grid-template-columns:repeat(2,1fr)}
  .hero-grid{gap:26px}
  .hero h1{font-size:clamp(32px,3.9vw,48px)}
  .g3,.g4{gap:14px}
  .card{padding:19px}
  .footer-inner{gap:24px}
}
/* 中等宽度：收起横向导航，改用汉堡菜单，避免导航与按钮互相挤压 */
@media (max-width:1120px){
  .main-nav{display:none}
  .menu-trigger{display:inline-flex}
  .header-actions{gap:7px}
  .mobile-nav{display:block;position:fixed;top:72px;left:0;right:0;background:var(--surface);border-bottom:1px solid var(--border);box-shadow:var(--shadow);padding:12px 20px 18px;max-height:calc(100vh - 72px);overflow:auto;transform:translateY(-10px);opacity:0;pointer-events:none;transition:.2s;z-index:59}
  .mobile-nav.open{transform:none;opacity:1;pointer-events:auto}
  .mobile-nav a{display:block;padding:11px 12px;border-radius:10px;font-size:14px;font-weight:600;color:var(--text-2)}
  .mobile-nav a.active{background:var(--brand-soft);color:var(--brand)}
  .footer-inner{grid-template-columns:1fr 1.35fr}
  .footer-contact{grid-column:1/-1;display:grid;grid-template-columns:1fr 1fr;gap:0 28px;align-items:start}
  .footer-contact h4{grid-column:1/-1}
  .qr-pair{max-width:420px}
}
@media (max-width:980px){
  .header-cta{display:inline-flex}
  .hero-grid{grid-template-columns:1fr;gap:24px}
  .hero-visual{min-height:360px;max-width:440px;margin:0 auto;width:100%}
  .mini-layout{grid-template-columns:1fr}
  .dash{grid-template-columns:1fr}
  .dash-side{position:static;display:flex;gap:6px;overflow:auto;padding:10px}
  .dash-side .side-title{display:none}
  .dash-side button{width:auto;white-space:nowrap;flex:none}
  .g4{grid-template-columns:repeat(2,1fr)}
}
/* 平板及以下才竖排；电脑端始终保持上中下游一行 */
@media (max-width:900px){
  .chain-rail{display:none}
  .chain-flow,.chain-flow[data-single="1"]{grid-template-columns:minmax(0,1fr)}
  .chain-col:not(:last-child)::after{content:"↓";right:auto;left:50%;top:auto;bottom:-24px;transform:translateX(-50%)}
  .chain-col{margin-bottom:14px}
  .footer-inner{grid-template-columns:1fr;gap:28px}
  .footer-contact{grid-column:auto;display:block}
  .qr-pair{max-width:360px}
}
@media (max-width:720px){
  .wrap,.header-inner,.footer-inner,.footer-bottom{width:calc(100% - 28px)}
  .site-main{padding-top:66px;padding-bottom:64px}
  .section{padding:42px 0}
  .header-inner{height:64px;gap:8px}
  .brand-text strong{font-size:15px}
  .brand-mark{width:33px;height:33px}
  .theme-btn{width:30px;height:30px}
  .theme-btn svg{width:16px;height:16px}
  .header-cta{display:none}
  /* 手机端顶栏空间紧张：登录入口改由汉堡菜单里的「会员中心」进入，避免右侧按钮被裁切 */
  #headerLogin{display:none}
  .search-trigger{display:inline-flex;width:34px;height:34px;padding:7px}
  .mobile-nav{top:64px}
  h1{font-size:31px}
  .hero{padding:40px 0 40px}
  .hero-stats{grid-template-columns:repeat(2,1fr);gap:14px}
  .hero-visual{min-height:320px}
  .ai-node{width:70px;font-size:10px;padding:7px 4px}
  .g2,.g3,.g4,.g5,.two-col,.pro-con,.field-grid,.tool-modal-grid{grid-template-columns:1fr}
  .g4.keep2,.g5.keep2{grid-template-columns:repeat(2,1fr)}
  .footer-links{grid-template-columns:repeat(2,1fr)}
  .mobile-tabbar{position:fixed;left:0;right:0;bottom:0;z-index:65;height:60px;background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(12px);border-top:1px solid var(--border);display:flex;align-items:center;justify-content:space-around;padding:0 4px env(safe-area-inset-bottom)}
  .mobile-tabbar button{border:0;background:transparent;color:var(--muted);font-size:10px;display:flex;flex-direction:column;align-items:center;gap:2px;flex:1;padding:4px 0}
  .mobile-tabbar button i{font-style:normal;font-size:18px;line-height:1.1}
  .mobile-tabbar button.active{color:var(--brand);font-weight:700}
  .ai-fab{right:14px;bottom:74px;padding:10px 14px;font-size:12px}
  .ai-fab-text{display:none}
  .ai-panel{right:12px;bottom:132px;width:calc(100vw - 24px);height:min(500px,calc(100vh - 190px))}
  .phone{width:272px;height:560px}
  .modal{max-height:90vh}
  .modal-body{padding:16px}
  .modal-head,.modal-foot{padding:14px 16px}
  .toast-root{top:74px}
  .table-wrap{border-radius:12px}
  .section-head{margin-bottom:24px}
}
@media (max-width:380px){.hero-stats{grid-template-columns:1fr 1fr}.hero-stat strong{font-size:20px}}