/* ============================================================
   秋橙科技 · 城市子站 V2 设计系统
   一套 CSS，全部城市共用；每页通过 :root{--brand/--brand2} 换肤
   覆盖：首页 / 栏目专题页 / 文章内容页
   ============================================================ */

/* ---------- 1. 设计变量 ---------- */
:root{
  /* 品牌色（每城市页内覆盖） */
  --brand:#e8631a;
  --brand2:#1e6fff;
  --brand-deep:#c74f0e;

  /* 中性色 */
  --bg:#f6f8fb;
  --surface:#ffffff;
  --surface-2:#eef2f8;
  --border:#e6ebf2;
  --text:#1b2430;
  --text-2:#4a5568;
  --text-3:#8a94a6;

  /* 品牌渐变色带 */
  --grad:linear-gradient(120deg,var(--brand),var(--brand2));
  --grad-soft:linear-gradient(120deg,rgba(232,99,26,.08),rgba(30,111,255,.08));

  /* 圆角 / 阴影 / 间距 */
  --r-sm:8px; --r-md:12px; --r-lg:18px; --r-xl:24px;
  --sh-sm:0 1px 2px rgba(16,24,40,.05),0 1px 3px rgba(16,24,40,.06);
  --sh-md:0 4px 12px rgba(16,24,40,.07),0 2px 4px rgba(16,24,40,.04);
  --sh-lg:0 16px 40px rgba(16,24,40,.10);
  --w:1180px;

  --font: -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
}

/* ---------- 2. Reset / 基础 ---------- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.65;font-size:16px}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button{font-family:inherit;cursor:pointer;border:none;background:none}
h1,h2,h3,h4{line-height:1.3;font-weight:700;color:var(--text)}
.container{width:100%;max-width:var(--w);margin:0 auto;padding:0 20px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
:focus-visible{outline:3px solid rgba(30,111,255,.45);outline-offset:2px;border-radius:4px}

/* 通用按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 26px;border-radius:999px;font-weight:600;font-size:15px;color:#fff;background:var(--grad);box-shadow:0 8px 20px rgba(30,111,255,.22);transition:transform .18s ease,box-shadow .18s ease,opacity .18s;white-space:nowrap}
.btn:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(30,111,255,.30);opacity:.96}
.btn-ghost{background:var(--surface);color:var(--brand-deep);border:1.5px solid var(--border);box-shadow:none}
.btn-ghost:hover{border-color:var(--brand);box-shadow:var(--sh-sm)}
.btn-sm{padding:8px 18px;font-size:14px}

/* 区块头 */
.section-head{text-align:center;max-width:760px;margin:0 auto 42px}
.section-head .eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.12em;color:var(--brand);background:var(--grad-soft);padding:6px 16px;border-radius:999px;margin-bottom:14px}
.section-head h2{font-size:clamp(24px,3.2vw,34px);margin-bottom:12px}
.section-head p{color:var(--text-2);font-size:16px}
.section{padding:64px 0}
.section.alt{background:var(--surface)}

/* ---------- 3. 顶栏 ---------- */
.topbar{background:linear-gradient(120deg,var(--brand),var(--brand2));color:#fff;font-size:13.5px}
.topbar .container{display:flex;align-items:center;justify-content:space-between;height:40px;gap:12px}
.tb-tag{opacity:.95}
.tb-phone{font-weight:700;letter-spacing:.02em}
.tb-phone i{margin-right:6px}
@media(max-width:640px){.tb-tag{display:none}}

/* ---------- 4. 头部 / 导航 ---------- */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.9);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--border);transition:box-shadow .2s}
.site-header.scrolled{box-shadow:var(--sh-sm)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:72px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;color:var(--text)}
.logo img{height:40px;width:auto}
.logo .city-badge{font-size:12px;font-weight:700;color:var(--brand);background:var(--grad-soft);border:1px solid rgba(232,99,26,.25);padding:2px 10px;border-radius:999px}
.nav{display:flex;align-items:center;gap:6px}
.nav a.nav-link{position:relative;display:block;padding:9px 14px;font-size:15px;font-weight:500;color:var(--text-2);border-radius:8px;transition:color .15s,background .15s}
.nav a.nav-link:hover{color:var(--brand-deep);background:var(--surface-2)}
.nav a.nav-link.active{color:var(--brand-deep);font-weight:700}
.nav a.nav-link.active::after{content:"";position:absolute;left:14px;right:14px;bottom:2px;height:3px;border-radius:3px;background:var(--grad)}
.nav-cta{display:inline-flex;align-items:center;gap:6px;margin-left:10px;padding:9px 18px;border-radius:999px;background:var(--grad);color:#fff;font-size:14px;font-weight:600;box-shadow:0 6px 16px rgba(30,111,255,.22);transition:transform .18s}
.nav-cta:hover{transform:translateY(-1px)}
.nav-toggle{display:none;width:42px;height:42px;border-radius:10px;border:1px solid var(--border);font-size:20px;align-items:center;justify-content:center;color:var(--text)}
@media(max-width:920px){
  .nav{position:fixed;inset:0 0 0 auto;width:min(320px,84vw);flex-direction:column;align-items:stretch;background:var(--surface);padding:80px 20px 30px;box-shadow:-12px 0 40px rgba(16,24,40,.15);transform:translateX(100%);transition:transform .25s ease;gap:4px;overflow:auto}
  .nav.open{transform:none}
  .nav a.nav-link,.nav .nav-cta{margin:0;padding:13px 16px;font-size:16px}
  .nav-cta{justify-content:center;margin-top:14px}
  .nav-toggle{display:inline-flex}
  .nav-mask{position:fixed;inset:0;background:rgba(16,24,40,.4);opacity:0;visibility:hidden;transition:.25s;z-index:99}
  .nav-mask.show{opacity:1;visibility:visible}
}

/* ---------- 5. 首页 Hero ---------- */
.hero{position:relative;overflow:hidden;background:var(--grad);color:#fff}
.hero::before{content:"";position:absolute;inset:0;background:
  radial-gradient(680px 340px at 85% -10%,rgba(255,255,255,.22),transparent 60%),
  radial-gradient(520px 300px at -5% 110%,rgba(255,255,255,.14),transparent 55%)}
.hero .container{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;padding-top:72px;padding-bottom:84px}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.28);padding:6px 16px;border-radius:999px;font-size:13px;font-weight:600;margin-bottom:22px;backdrop-filter:blur(4px)}
.hero h1{font-size:clamp(28px,4vw,46px);font-weight:800;line-height:1.22;color:#fff;margin-bottom:18px}
.hero h1 em{font-style:normal;background:linear-gradient(120deg,#ffe3a8,#ffd0e2);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.hero p.lead{font-size:17px;opacity:.94;max-width:560px;margin-bottom:30px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero .btn{background:#fff;color:var(--brand-deep);box-shadow:0 10px 26px rgba(0,0,0,.18)}
.hero .btn-ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.6);box-shadow:none}
.hero .btn-ghost:hover{border-color:#fff;background:rgba(255,255,255,.1)}
.hero-trust{display:flex;gap:26px;margin-top:38px;flex-wrap:wrap}
.hero-trust .ht{display:flex;align-items:center;gap:8px;font-size:13.5px;opacity:.95}
.hero-trust .ht i{font-size:15px}
.hero-card{position:relative;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.25);border-radius:var(--r-xl);padding:26px;backdrop-filter:blur(8px)}
.hero-card .hc-top{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:700;margin-bottom:16px;opacity:.95}
.hero-card ul{display:grid;gap:10px}
.hero-card li{display:flex;align-items:flex-start;gap:9px;font-size:14.5px;line-height:1.55}
.hero-card li i{color:#ffe3a8;margin-top:3px}
.hero-card .hc-note{margin-top:16px;padding-top:14px;border-top:1px dashed rgba(255,255,255,.3);font-size:12.5px;opacity:.85}
@media(max-width:920px){
  .hero .container{grid-template-columns:1fr;padding-top:52px;padding-bottom:64px}
  .hero-card{display:none}
}

/* ---------- 6. 信任条 ---------- */
.trust-strip{background:var(--surface);border-bottom:1px solid var(--border)}
.trust-strip .container{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;padding-top:22px;padding-bottom:22px}
.trust-strip .ts{display:flex;align-items:center;justify-content:center;gap:9px;font-size:14px;font-weight:600;color:var(--text-2)}
.trust-strip .ts i{color:var(--brand);font-size:17px}
@media(max-width:920px){.trust-strip .container{grid-template-columns:repeat(2,1fr)}.trust-strip .ts{font-size:13px}}
@media(max-width:480px){.trust-strip .container{grid-template-columns:1fr 1fr}}

/* ---------- 7. 服务卡片 ---------- */
.svc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.svc-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);padding:26px 24px;transition:transform .2s,box-shadow .2s,border-color .2s;position:relative;overflow:hidden}
.svc-card::before{content:"";position:absolute;left:0;top:0;right:0;height:3px;background:var(--grad);opacity:0;transition:.2s}
.svc-card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);border-color:transparent}
.svc-card:hover::before{opacity:1}
.svc-ico{width:52px;height:52px;border-radius:14px;background:var(--grad-soft);display:flex;align-items:center;justify-content:center;font-size:22px;color:var(--brand);margin-bottom:16px}
.svc-card h3{font-size:18px;margin-bottom:8px}
.svc-card p{font-size:14.5px;color:var(--text-2);line-height:1.7;flex:1}
.svc-card .more{display:inline-flex;align-items:center;gap:6px;margin-top:16px;font-size:14px;font-weight:600;color:var(--brand-deep)}
.svc-card .more i{transition:transform .2s}
.svc-card:hover .more i{transform:translateX(4px)}
@media(max-width:920px){.svc-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.svc-grid{grid-template-columns:1fr}}

/* ---------- 8. AI 平台卡片 ---------- */
.ai-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.ai-card{display:flex;align-items:center;gap:14px;background:var(--surface);border:1px solid var(--border);border-radius:var(--r-md);padding:16px 18px;transition:transform .18s,box-shadow .18s}
.ai-card:hover{transform:translateY(-3px);box-shadow:var(--sh-md)}
.ai-ico{width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:20px;flex:none}
.ai-card h3{font-size:16px;line-height:1.2}
.ai-card span{font-size:12.5px;color:var(--text-3)}
@media(max-width:920px){.ai-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:560px){.ai-grid{grid-template-columns:1fr 1fr}}

/* ---------- 9. 本地优势 ---------- */
.local-band{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-xl);padding:34px;display:grid;grid-template-columns:1.1fr .9fr;gap:30px;align-items:center}
.local-band .lb-txt h3{font-size:22px;margin-bottom:12px}
.local-band .lb-txt p{color:var(--text-2);margin-bottom:18px}
.ind-tags{display:flex;flex-wrap:wrap;gap:10px}
.ind-tag{display:inline-flex;align-items:center;gap:6px;background:var(--grad-soft);color:var(--brand-deep);border:1px solid rgba(232,99,26,.22);padding:6px 14px;border-radius:999px;font-size:13px;font-weight:600}
.landmarks{display:flex;flex-wrap:wrap;gap:14px}
.lm{flex:1;min-width:130px;background:var(--bg);border:1px solid var(--border);border-radius:var(--r-md);padding:16px;text-align:center}
.lm i{font-size:22px;color:var(--brand);margin-bottom:6px}
.lm b{display:block;font-size:15px}
@media(max-width:920px){.local-band{grid-template-columns:1fr;padding:26px}}

/* ---------- 10. 数据条 ---------- */
.stat-band{background:var(--grad);color:#fff}
.stat-band .container{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding-top:44px;padding-bottom:44px}
.stat-band .st{text-align:center}
.stat-band .st .num{font-size:clamp(28px,3.4vw,42px);font-weight:800;line-height:1}
.stat-band .st .num span{font-size:.55em;font-weight:700;opacity:.9}
.stat-band .st .lb{margin-top:8px;font-size:14px;opacity:.92}
@media(max-width:720px){.stat-band .container{grid-template-columns:1fr 1fr}}

/* ---------- 11. 流程步骤 ---------- */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:step}
.step{position:relative;background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);padding:26px 22px}
.step .no{position:absolute;top:-16px;left:22px;width:34px;height:34px;border-radius:10px;background:var(--grad);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;font-size:15px;box-shadow:var(--sh-sm)}
.step h3{font-size:16.5px;margin:10px 0 8px}
.step p{font-size:14px;color:var(--text-2)}
@media(max-width:920px){.steps{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.steps{grid-template-columns:1fr}}

/* ---------- 12. GEO 资讯列表 ---------- */
.geo-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.geo-item{display:flex;gap:16px;background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);padding:18px;transition:transform .2s,box-shadow .2s}
.geo-item:hover{transform:translateY(-3px);box-shadow:var(--sh-md)}
.geo-item .thumb{flex:none;width:150px;height:104px;border-radius:var(--r-sm);overflow:hidden;background:var(--surface-2)}
.geo-item .thumb img{width:100%;height:100%;object-fit:cover;transition:transform .3s}
.geo-item:hover .thumb img{transform:scale(1.05)}
.geo-info{flex:1;display:flex;flex-direction:column}
.geo-info h3{font-size:16.5px;line-height:1.5;margin-bottom:6px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.geo-info h3 a{color:var(--text)}
.geo-info h3 a:hover{color:var(--brand-deep)}
.geo-info .summary{font-size:13.5px;color:var(--text-2);line-height:1.65;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.geo-meta{margin-top:auto;display:flex;align-items:center;gap:14px;font-size:12.5px;color:var(--text-3)}
.geo-meta time{display:inline-flex;align-items:center;gap:5px}
@media(max-width:760px){
  .geo-grid{grid-template-columns:1fr}
  .geo-item .thumb{width:110px;height:88px}
}

/* 分页 */
.pagination{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:40px}
.pagination a,.pagination span{min-width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;border:1px solid var(--border);border-radius:10px;background:var(--surface);font-size:14px;color:var(--text-2);transition:.15s}
.pagination a:hover{border-color:var(--brand);color:var(--brand-deep)}
.pagination .cur{background:var(--grad);color:#fff;border-color:transparent;font-weight:700}

/* ---------- 13. 栏目页 Hero ---------- */
.col-hero{background:var(--grad);color:#fff;position:relative;overflow:hidden}
.col-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(600px 300px at 90% -20%,rgba(255,255,255,.2),transparent 60%)}
.col-hero .container{position:relative;z-index:1;padding-top:58px;padding-bottom:58px}
.col-hero h1{color:#fff;font-size:clamp(26px,3.6vw,38px);margin-bottom:12px}
.col-hero p{opacity:.94;max-width:720px;font-size:16px}
.col-hero .crumb{display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:13px;opacity:.92;margin-bottom:16px}
.col-hero .crumb a{text-decoration:underline;text-underline-offset:3px}
.col-hero .crumb a:hover{opacity:.8}

/* ---------- 14. 文章阅读页 ---------- */
.art-layout{display:grid;grid-template-columns:minmax(0,1fr) 250px;gap:36px;align-items:start;padding:40px 0 70px}
.art-main{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-xl);padding:44px 48px;box-shadow:var(--sh-sm)}
.art-crumb{font-size:13px;color:var(--text-3);margin-bottom:20px;display:flex;flex-wrap:wrap;gap:6px}
.art-crumb a{color:var(--text-2)}
.art-crumb a:hover{color:var(--brand-deep)}
.art-crumb .sep{color:var(--text-3)}
.art-main h1{font-size:clamp(24px,3vw,32px);line-height:1.35;margin-bottom:16px}
.art-meta{display:flex;flex-wrap:wrap;gap:16px;align-items:center;color:var(--text-3);font-size:13.5px;padding-bottom:20px;border-bottom:1px solid var(--border);margin-bottom:26px}
.art-meta time,.art-meta span{display:inline-flex;align-items:center;gap:6px}
.art-tags{display:flex;gap:8px;margin-left:auto;flex-wrap:wrap}
.art-tags a{background:var(--grad-soft);color:var(--brand-deep);font-size:12.5px;padding:4px 12px;border-radius:999px;font-weight:600}
.art-lead{font-size:17px;color:var(--text-2);background:var(--grad-soft);border-left:4px solid var(--brand);border-radius:0 var(--r-sm) var(--r-sm) 0;padding:16px 20px;margin-bottom:26px;line-height:1.8}
.art-body{font-size:16.5px;line-height:1.95;color:#2a3441}
.art-body h2{font-size:22px;margin:38px 0 14px;padding-left:14px;border-left:4px solid var(--brand);line-height:1.4}
.art-body h3{font-size:18.5px;margin:28px 0 10px;color:var(--text)}
.art-body p{margin:14px 0}
.art-body ul,.art-body ol{margin:14px 0 14px 4px;padding-left:4px}
.art-body ul li{position:relative;padding-left:22px;margin:9px 0}
.art-body ul li::before{content:"▸";position:absolute;left:0;color:var(--brand);font-weight:700}
.art-body ol{counter-reset:li;list-style:none}
.art-body ol li{position:relative;padding-left:34px;margin:10px 0;counter-increment:li}
.art-body ol li::before{content:counter(li);position:absolute;left:0;top:2px;width:24px;height:24px;border-radius:8px;background:var(--grad-soft);color:var(--brand-deep);font-size:13px;font-weight:700;display:flex;align-items:center;justify-content:center}
.art-body strong{color:var(--text)}
.art-body a{color:var(--brand-deep);text-decoration:underline;text-underline-offset:3px}
.art-body blockquote{margin:20px 0;padding:16px 20px;background:var(--bg);border-left:4px solid var(--brand2);border-radius:0 var(--r-sm) var(--r-sm) 0;color:var(--text-2)}
.art-body table{width:100%;border-collapse:collapse;margin:22px 0;font-size:15px}
.art-body th,.art-body td{border:1px solid var(--border);padding:11px 14px;text-align:left}
.art-body th{background:var(--surface-2);font-weight:700}
.art-body .callout{display:flex;gap:12px;background:var(--grad-soft);border:1px solid rgba(232,99,26,.22);border-radius:var(--r-md);padding:16px 18px;margin:22px 0;font-size:15.5px;color:var(--text-2)}
.art-body .callout i{color:var(--brand);font-size:18px;margin-top:2px}

/* FAQ */
.faq-list{margin:24px 0 0}
.faq-item{border:1px solid var(--border);border-radius:var(--r-md);background:var(--surface);margin-bottom:12px;overflow:hidden}
.faq-q{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;padding:16px 18px;font-size:15.5px;font-weight:600;color:var(--text);text-align:left}
.faq-q i{transition:transform .25s;color:var(--text-3);flex:none}
.faq-item.open .faq-q i{transform:rotate(45deg);color:var(--brand)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .28s ease}
.faq-a p{padding:0 18px 16px;color:var(--text-2);font-size:14.5px;line-height:1.8}

/* 相关阅读 */
.art-rel{margin-top:40px;padding-top:28px;border-top:1px solid var(--border)}
.art-rel h3{font-size:17px;margin-bottom:16px;display:flex;align-items:center;gap:8px}
.art-rel h3 i{color:var(--brand)}
.rel-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.rel-item{display:flex;align-items:center;gap:10px;padding:12px 14px;border:1px solid var(--border);border-radius:var(--r-md);font-size:14px;color:var(--text-2);transition:.15s}
.rel-item:hover{border-color:var(--brand);color:var(--brand-deep);background:var(--grad-soft)}
.rel-item i{color:var(--brand);flex:none}
@media(max-width:560px){.rel-grid{grid-template-columns:1fr}}

/* 侧栏 */
.art-side{position:sticky;top:92px;display:grid;gap:20px}
.side-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r-lg);padding:22px}
.side-card h3{font-size:15.5px;margin-bottom:14px;display:flex;align-items:center;gap:8px}
.side-card h3 i{color:var(--brand)}
.side-toc{display:grid;gap:4px;max-height:340px;overflow:auto}
.side-toc a{font-size:13.5px;color:var(--text-2);padding:7px 10px;border-radius:8px;line-height:1.5;transition:.15s}
.side-toc a:hover{background:var(--surface-2);color:var(--brand-deep)}
.side-toc a.d2{padding-left:22px;font-size:13px;color:var(--text-3)}
.side-toc a.active{background:var(--grad-soft);color:var(--brand-deep);font-weight:600}
.side-contact{text-align:center}
.side-contact .sc-ico{width:54px;height:54px;margin:0 auto 12px;border-radius:16px;background:var(--grad-soft);display:flex;align-items:center;justify-content:center;font-size:24px;color:var(--brand)}
.side-contact p{font-size:14px;color:var(--text-2);margin-bottom:6px}
.side-contact .tel{font-size:20px;font-weight:800;color:var(--brand-deep);margin-bottom:14px;display:block}
.side-contact .btn{width:100%}
.side-links{display:grid;gap:8px}
.side-link{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:10px 12px;border:1px solid var(--border);border-radius:10px;font-size:14px;color:var(--text-2);transition:.15s}
.side-link:hover{border-color:var(--brand);color:var(--brand-deep);background:var(--grad-soft)}
.side-link i{color:var(--brand);flex:none}
@media(max-width:920px){.art-layout{grid-template-columns:1fr}.art-side{position:static;grid-template-columns:1fr}}

/* 文章页移动端阅读进度条 */
.read-progress{position:fixed;left:0;top:0;height:3px;background:var(--grad);z-index:200;width:0;transition:width .08s linear}

/* ---------- 15. 面包屑（列表页） ---------- */
.crumb-bar{background:var(--bg);border-bottom:1px solid var(--border)}
.crumb-bar .container{display:flex;flex-wrap:wrap;gap:6px;align-items:center;padding-top:14px;padding-bottom:14px;font-size:13.5px;color:var(--text-3)}
.crumb-bar a{color:var(--text-2)}
.crumb-bar a:hover{color:var(--brand-deep)}
.crumb-bar .sep{color:var(--text-3)}

/* ---------- 16. CTA ---------- */
.cta-band{background:var(--grad);color:#fff;text-align:center;position:relative;overflow:hidden}
.cta-band::before{content:"";position:absolute;inset:0;background:radial-gradient(600px 300px at 50% -40%,rgba(255,255,255,.18),transparent 60%)}
.cta-band .container{position:relative;z-index:1;padding-top:58px;padding-bottom:58px}
.cta-band h2{color:#fff;font-size:clamp(22px,3vw,32px);margin-bottom:10px}
.cta-band p{opacity:.93;margin-bottom:26px}
.cta-band .btn{background:#fff;color:var(--brand-deep);box-shadow:0 10px 26px rgba(0,0,0,.16)}
.cta-band .tel-note{margin-top:14px;font-size:13.5px;opacity:.85}

/* ---------- 17. 页脚 ---------- */
.site-footer{background:#101828;color:#c7cfdb}
.site-footer .container{padding-top:48px;padding-bottom:30px}
.foot-top{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:36px;padding-bottom:36px;border-bottom:1px solid rgba(255,255,255,.1)}
.foot-brand .logo{color:#fff;margin-bottom:14px}
.foot-brand .logo .city-badge{background:rgba(255,255,255,.1);border-color:rgba(255,255,255,.2);color:#ffd9b8}
.foot-brand p{font-size:14px;line-height:1.8;color:#9aa7b8;max-width:420px}
.foot-col h4{color:#fff;font-size:15px;margin-bottom:14px}
.foot-col a{display:block;font-size:14px;color:#9aa7b8;padding:6px 0;transition:.15s}
.foot-col a:hover{color:#fff}
.foot-contact li{display:flex;gap:10px;font-size:14px;color:#9aa7b8;padding:6px 0;align-items:flex-start}
.foot-contact i{color:var(--brand);margin-top:3px}
.foot-bottom{display:flex;flex-wrap:wrap;gap:10px;align-items:center;justify-content:space-between;padding-top:22px;font-size:13px;color:#7d8a9c}
.foot-bottom a{color:#9aa7b8}
.foot-bottom a:hover{color:#fff}
.foot-cities{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.foot-cities a{font-size:12.5px;color:#9aa7b8;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);padding:4px 11px;border-radius:999px;transition:.15s}
.foot-cities a:hover{color:#fff;border-color:var(--brand)}
@media(max-width:920px){.foot-top{grid-template-columns:1fr 1fr}.foot-brand{grid-column:1/-1}}
@media(max-width:560px){.foot-top{grid-template-columns:1fr}.foot-bottom{flex-direction:column;align-items:flex-start}}

/* ---------- 18. 返回顶部 ---------- */
.to-top{position:fixed;right:22px;bottom:26px;width:46px;height:46px;border-radius:14px;background:var(--grad);color:#fff;font-size:18px;display:flex;align-items:center;justify-content:center;box-shadow:var(--sh-lg);opacity:0;visibility:hidden;transform:translateY(12px);transition:.25s;z-index:150}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top:hover{transform:translateY(-2px)}

/* 城市切换抽屉 */
.city-switch{position:fixed;right:22px;bottom:80px;z-index:150;display:none}
@media(max-width:920px){.city-switch{display:none}}

/* 打印 */
@media print{
  .topbar,.site-header,.read-progress,.to-top,.cta-band,.site-footer,.art-side{display:none!important}
  .art-layout{grid-template-columns:1fr}
  .art-main{box-shadow:none;border:none;padding:0}
  body{background:#fff}
}