/* ==========================================================================
   鲤元GEO · 重庆千鲤网络科技有限公司 官网样式表
   版本 1.0  |  设计目标：B2B 专业感 + AI 友好语义结构
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  /* 品牌色：深墨蓝(信任) + 青碧(水/鲤) + 鎏金(跃龙门) */
  --ink-900:#070F1C;
  --ink-800:#0B1526;
  --ink-700:#12203A;
  --ink-600:#1C2E4D;
  --ink-500:#33475F;
  --ink-400:#5A6B82;
  --ink-300:#8A99AC;
  --ink-200:#C3CCD8;
  --ink-100:#E6EBF1;
  --ink-50:#F4F7FA;

  --teal-600:#0B7C74;
  --teal-500:#0E9C8E;
  --teal-400:#17B8A6;
  --teal-300:#4FD6C5;
  --teal-100:#D6F5F0;

  --gold-500:#D99A2B;
  --gold-400:#E8B455;
  --gold-100:#FBF0DA;

  --white:#FFFFFF;
  --bg:#F7F9FC;
  --surface:#FFFFFF;
  --border:#E1E7EF;

  /* 语义色 */
  --ok:#1A9C5B;
  --warn:#D99A2B;
  --err:#D2453C;

  /* 排版 */
  --font-sans:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Source Han Sans SC","Noto Sans CJK SC",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --font-mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;

  --fs-display:clamp(2.1rem,4.6vw,3.5rem);
  --fs-h1:clamp(1.85rem,3.6vw,2.75rem);
  --fs-h2:clamp(1.5rem,2.6vw,2rem);
  --fs-h3:1.25rem;
  --fs-h4:1.0625rem;
  --fs-body:1rem;
  --fs-small:.9375rem;
  --fs-xs:.8125rem;

  --lh-tight:1.22;
  --lh-body:1.85;

  /* 布局 */
  --wrap:1200px;
  --wrap-narrow:820px;
  --gutter:clamp(1.1rem,4vw,2.5rem);
  --section-y:clamp(3.4rem,7vw,6rem);
  --radius:14px;
  --radius-sm:9px;
  --radius-lg:22px;

  /* 效果 */
  --shadow-1:0 1px 2px rgba(7,15,28,.05),0 3px 10px rgba(7,15,28,.05);
  --shadow-2:0 6px 20px rgba(7,15,28,.08),0 2px 6px rgba(7,15,28,.05);
  --shadow-3:0 22px 55px rgba(7,15,28,.16);
  --ease:cubic-bezier(.22,.75,.28,1);
  --t:.28s var(--ease);
}

/* ---------- 2. 重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:88px}
body{
  margin:0;
  font-family:var(--font-sans);
  font-size:var(--fs-body);
  line-height:var(--lh-body);
  color:var(--ink-700);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  text-rendering:optimizeLegibility;
}
img,svg,video{max-width:100%;height:auto;display:block}
a{color:var(--teal-600);text-decoration:none;transition:color var(--t)}
a:hover{color:var(--teal-400)}
a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{
  outline:3px solid var(--teal-400);outline-offset:2px;border-radius:4px;
}
ul,ol{margin:0;padding:0}
button{font:inherit;cursor:pointer;border:0;background:none;color:inherit}
table{border-collapse:collapse;width:100%}

/* ---------- 3. 排版 ---------- */
h1,h2,h3,h4,h5,h6{
  color:var(--ink-900);
  font-weight:700;
  line-height:var(--lh-tight);
  margin:0 0 .6em;
  letter-spacing:-.015em;
}
h1{font-size:var(--fs-h1)}
h2{font-size:var(--fs-h2)}
h3{font-size:var(--fs-h3)}
h4{font-size:var(--fs-h4)}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
strong,b{font-weight:700;color:var(--ink-900)}
em{font-style:normal;color:var(--teal-600);font-weight:600}
hr{border:0;border-top:1px solid var(--border);margin:2.4rem 0}

.lede{font-size:clamp(1.02rem,1.6vw,1.19rem);color:var(--ink-500);line-height:1.9}
.muted{color:var(--ink-400)}
.small{font-size:var(--fs-small)}
.xs{font-size:var(--fs-xs)}
.center{text-align:center}
.nowrap{white-space:nowrap}
mark{background:linear-gradient(180deg,transparent 58%,var(--teal-100) 58%);color:inherit;padding:0 2px}

/* ---------- 4. 布局容器 ---------- */
.wrap{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--gutter)}
.wrap-narrow{width:100%;max-width:var(--wrap-narrow);margin-inline:auto;padding-inline:var(--gutter)}
.section{padding-block:var(--section-y)}
.section-tight{padding-block:clamp(2.2rem,4vw,3.4rem)}
.stack>*+*{margin-top:1.1rem}
.stack-lg>*+*{margin-top:2rem}

.grid{display:grid;gap:clamp(1rem,2vw,1.6rem)}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.grid-auto{grid-template-columns:repeat(auto-fit,minmax(258px,1fr))}
.split{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:clamp(1.6rem,4vw,3.4rem);align-items:start}
.split-flip{grid-template-columns:minmax(0,.95fr) minmax(0,1.05fr)}

/* ---------- 5. 区块标题 ---------- */
.sec-head{max-width:760px;margin-bottom:clamp(1.8rem,3.4vw,2.8rem)}
.sec-head.center{margin-inline:auto;text-align:center}
.eyebrow{
  display:inline-flex;align-items:center;gap:.45rem;
  font-size:var(--fs-xs);font-weight:700;letter-spacing:.14em;text-transform:uppercase;
  color:var(--teal-600);background:var(--teal-100);
  padding:.34rem .78rem;border-radius:999px;margin-bottom:1rem;
}
.eyebrow--gold{color:#8C6112;background:var(--gold-100)}
.eyebrow--dark{color:var(--teal-300);background:rgba(23,184,166,.14)}
.sec-head p{color:var(--ink-400);font-size:1.03rem;line-height:1.9}

/* ---------- 6. 顶部导航 ---------- */
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:200;
  background:var(--teal-500);color:#fff;padding:.7rem 1.2rem;border-radius:0 0 8px 0;font-weight:600;
}
.skip-link:focus{left:0}

.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.86);
  backdrop-filter:saturate(180%) blur(14px);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--border);
  transition:box-shadow var(--t),background var(--t);
}
.site-header.is-stuck{box-shadow:var(--shadow-1)}
/* PC：Logo 左 | 导航居中 | 电话/按钮右；导航文字强制单行 */
.header-inner{
  display:grid;
  grid-template-columns:auto minmax(0,1fr) auto;
  align-items:center;
  column-gap:.85rem;
  height:72px;
}

.brand{display:flex;align-items:center;gap:.55rem;justify-self:start;flex:0 0 auto}
.brand-mark{width:36px;height:36px;flex:0 0 auto}
.brand-text{display:flex;flex-direction:column;line-height:1.15}
.brand-name{font-size:1rem;font-weight:800;color:var(--ink-900);letter-spacing:-.01em;white-space:nowrap!important}
.brand-sub{font-size:.625rem;color:var(--ink-300);letter-spacing:.08em;font-weight:600;white-space:nowrap!important}
.brand:hover .brand-name{color:var(--teal-600)}

.main-nav{
  display:flex;align-items:center;justify-content:center;justify-self:center;
  flex:1 1 auto;min-width:0;overflow:visible;
}
.main-nav ul{
  display:flex;align-items:center;justify-content:center;
  flex-wrap:nowrap!important;gap:0;
  list-style:none;margin:0;padding:0;width:max-content;max-width:100%;
}
.main-nav li{flex:0 0 auto;min-width:0}
.main-nav a{
  display:inline-flex;align-items:center;justify-content:center;
  padding:.42rem .48rem;border-radius:8px;
  font-size:.8125rem;font-weight:600;color:var(--ink-500);
  line-height:1.15;letter-spacing:0;
  white-space:nowrap!important;word-break:keep-all;
  writing-mode:horizontal-tb;text-orientation:mixed;
  transition:color var(--t),background var(--t);
}
.main-nav a:hover{color:var(--teal-600);background:var(--teal-100)}
.main-nav a[aria-current="page"]{color:var(--teal-600);background:var(--teal-100)}
.nav-cta{
  display:flex;align-items:center;justify-content:flex-end;gap:.45rem;
  justify-self:end;flex:0 0 auto;flex-wrap:nowrap;
}
.nav-tel{
  display:inline-flex;align-items:center;gap:.3rem;flex:0 0 auto;
  font-weight:700;color:var(--ink-900);font-size:.8125rem;white-space:nowrap!important;
}
.nav-tel svg{color:var(--teal-500);flex:0 0 auto}
.nav-tel:hover{color:var(--teal-600)}
.nav-cta .btn{flex:0 0 auto;white-space:nowrap!important}

.nav-toggle{
  display:none;width:42px;height:42px;border-radius:9px;
  align-items:center;justify-content:center;border:1px solid var(--border);background:#fff;
  justify-self:end;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  content:"";display:block;width:19px;height:2px;background:var(--ink-800);border-radius:2px;
  transition:transform var(--t),opacity var(--t);position:relative;
}
.nav-toggle span::before{position:absolute;top:-6px}
.nav-toggle span::after{position:absolute;top:6px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{transform:translateY(6px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{transform:translateY(-6px) rotate(-45deg)}

/* 二级信息条 */
.topbar{background:var(--ink-900);color:var(--ink-200);font-size:.8125rem}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:1rem;min-height:36px;flex-wrap:wrap}
.topbar a{color:var(--teal-300)}
.topbar a:hover{color:#fff}

/* ---------- 7. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.78rem 1.5rem;border-radius:10px;
  font-size:.9375rem;font-weight:700;line-height:1.2;white-space:nowrap;
  transition:transform var(--t),box-shadow var(--t),background var(--t),color var(--t),border-color var(--t);
  border:1.5px solid transparent;cursor:pointer;
}
.btn svg{flex:0 0 auto;transition:transform var(--t)}
.btn:hover svg{transform:translateX(3px)}
.btn:active{transform:translateY(1px)}
.btn--primary{background:linear-gradient(135deg,var(--teal-500),var(--teal-600));color:#fff;box-shadow:0 6px 18px rgba(14,156,142,.3)}
.btn--primary:hover{background:linear-gradient(135deg,var(--teal-400),var(--teal-500));color:#fff;box-shadow:0 10px 26px rgba(14,156,142,.4);transform:translateY(-2px)}
.btn--gold{background:linear-gradient(135deg,var(--gold-400),var(--gold-500));color:#3A2606;box-shadow:0 6px 18px rgba(217,154,43,.32)}
.btn--gold:hover{color:#3A2606;box-shadow:0 10px 26px rgba(217,154,43,.42);transform:translateY(-2px)}
.btn--ghost{background:#fff;color:var(--ink-800);border-color:var(--ink-200)}
.btn--ghost:hover{border-color:var(--teal-400);color:var(--teal-600);background:var(--teal-100)}
.btn--dark{background:rgba(255,255,255,.1);color:#fff;border-color:rgba(255,255,255,.32)}
.btn--dark:hover{background:rgba(255,255,255,.18);color:#fff;border-color:rgba(255,255,255,.55)}
.btn--sm{padding:.55rem 1.05rem;font-size:.875rem;border-radius:9px}
.btn--lg{padding:.95rem 1.9rem;font-size:1rem;border-radius:11px}
.btn--block{width:100%}
.btn-row{display:flex;flex-wrap:wrap;gap:.8rem;align-items:center}

/* ---------- 8. Hero ---------- */
.hero{
  position:relative;overflow:hidden;
  background:
    radial-gradient(1100px 620px at 82% -12%,rgba(23,184,166,.30),transparent 58%),
    radial-gradient(760px 520px at 6% 108%,rgba(217,154,43,.17),transparent 60%),
    linear-gradient(163deg,var(--ink-900) 0%,var(--ink-800) 46%,var(--ink-700) 100%);
  color:var(--ink-100);
  padding-block:clamp(3.2rem,7vw,5.4rem) clamp(3rem,6vw,4.6rem);
}
.hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;opacity:.42;
  background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);
  background-size:58px 58px;
  mask-image:radial-gradient(ellipse 78% 68% at 50% 34%,#000 30%,transparent 100%);
  -webkit-mask-image:radial-gradient(ellipse 78% 68% at 50% 34%,#000 30%,transparent 100%);
}
.hero>*{position:relative;z-index:1}
.hero h1{color:#fff;font-size:var(--fs-display);margin-bottom:.55em;letter-spacing:-.025em}
.hero h1 .accent{
  background:linear-gradient(100deg,var(--teal-300),var(--teal-400) 52%,var(--gold-400));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent;
}
.hero .lede{color:var(--ink-200);max-width:660px;font-size:clamp(1rem,1.7vw,1.16rem)}
.hero-body{max-width:700px}
.hero .eyebrow{background:rgba(23,184,166,.16);color:var(--teal-300)}
.hero-note{margin-top:1.5rem;font-size:var(--fs-small);color:var(--ink-300);display:flex;flex-wrap:wrap;gap:.4rem 1.3rem}
.hero-note span{display:inline-flex;align-items:center;gap:.4rem}
.hero-note svg{color:var(--teal-400);flex:0 0 auto}

/* AI 平台墙 */
.platform-strip{margin-top:clamp(2.2rem,4vw,3.2rem)}
.platform-strip .label{
  font-size:var(--fs-xs);letter-spacing:.14em;text-transform:uppercase;
  color:var(--ink-300);font-weight:700;margin-bottom:.9rem;
}
.platform-list{display:flex;flex-wrap:wrap;gap:.55rem}
.platform-list li{
  list-style:none;padding:.42rem .9rem;border-radius:999px;
  background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);
  color:var(--ink-100);font-size:.8425rem;font-weight:600;
  transition:background var(--t),border-color var(--t),transform var(--t);
}
.platform-list li:hover{background:rgba(23,184,166,.2);border-color:rgba(79,214,197,.5);transform:translateY(-2px)}

/* 内页 Hero */
.page-hero{
  position:relative;overflow:hidden;
  background:linear-gradient(157deg,var(--ink-900),var(--ink-700) 72%,var(--ink-600));
  color:var(--ink-100);padding-block:clamp(2.6rem,5.4vw,4rem);
}
.page-hero::before{
  content:"";position:absolute;inset:0;opacity:.4;
  background:radial-gradient(760px 420px at 88% -20%,rgba(23,184,166,.34),transparent 62%);
}
.page-hero>*{position:relative;z-index:1}
.page-hero h1{color:#fff;font-size:clamp(1.7rem,3.4vw,2.5rem);margin-bottom:.4em}
.page-hero .lede{color:var(--ink-200);max-width:700px}

/* ---------- 9. 面包屑 ---------- */
.breadcrumb{margin-bottom:1.15rem}
.breadcrumb ol{display:flex;flex-wrap:wrap;align-items:center;gap:.34rem;list-style:none;font-size:var(--fs-xs)}
.breadcrumb li{display:flex;align-items:center;gap:.34rem;color:var(--ink-300)}
.breadcrumb a{color:var(--ink-200)}
.breadcrumb a:hover{color:#fff;text-decoration:underline}
.breadcrumb [aria-current="page"]{color:var(--teal-300);font-weight:600}
.breadcrumb .sep{opacity:.5}
.breadcrumb--light li{color:var(--ink-400)}
.breadcrumb--light a{color:var(--ink-500)}
.breadcrumb--light a:hover{color:var(--teal-600);text-decoration:none}
.breadcrumb--light [aria-current="page"]{color:var(--teal-600)}

/* ---------- 10. 卡片 ---------- */
.card{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:clamp(1.3rem,2.4vw,1.85rem);
  transition:transform var(--t),box-shadow var(--t),border-color var(--t);
  height:100%;display:flex;flex-direction:column;
}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-2);border-color:var(--teal-300)}
.card h3,.card h4{margin-bottom:.5em}
.card p{color:var(--ink-400);font-size:.9375rem;line-height:1.82}
.card-icon{
  width:46px;height:46px;border-radius:12px;display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--teal-100),#EAF7FF);color:var(--teal-600);
  margin-bottom:1rem;flex:0 0 auto;
}
.card-icon--gold{background:linear-gradient(135deg,var(--gold-100),#FDF6E8);color:var(--gold-500)}
.card-icon--dark{background:rgba(23,184,166,.14);color:var(--teal-300)}
.card-num{
  font-family:var(--font-mono);font-size:.8125rem;font-weight:700;letter-spacing:.08em;
  color:var(--teal-500);margin-bottom:.7rem;display:block;
}
.card-link{margin-top:auto;padding-top:1rem;font-weight:700;font-size:.9375rem;display:inline-flex;align-items:center;gap:.35rem}
.card-link svg{transition:transform var(--t)}
.card-link:hover svg{transform:translateX(4px)}
.card--flat{background:var(--ink-50);border-color:transparent}
.card--flat:hover{background:#fff;border-color:var(--teal-300)}
.card--dark{background:rgba(255,255,255,.055);border-color:rgba(255,255,255,.13);color:var(--ink-200)}
.card--dark:hover{background:rgba(255,255,255,.1);border-color:rgba(79,214,197,.4)}
.card--dark h3,.card--dark h4{color:#fff}
.card--dark p{color:var(--ink-300)}
.card--accent{border-left:4px solid var(--teal-400)}

/* 列表卡 */
.list-card li{
  list-style:none;display:flex;gap:.6rem;padding:.45rem 0;
  font-size:.9375rem;color:var(--ink-500);line-height:1.72;
}
.list-card li::before{
  content:"";flex:0 0 auto;width:7px;height:7px;border-radius:50%;
  background:var(--teal-400);margin-top:.62rem;
}

/* ---------- 11. 数据指标 ---------- */
.stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));gap:clamp(.8rem,2vw,1.5rem)}
.stat{
  background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);
  padding:1.35rem 1.2rem;text-align:center;transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.stat:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:var(--teal-300)}
.stat-value{
  font-size:clamp(1.35rem,2.8vw,2.1rem);font-weight:800;line-height:1.2;
  background:linear-gradient(120deg,var(--teal-600),var(--teal-400));
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent;
  letter-spacing:-.01em;word-break:keep-all;
}
.stat-label{font-size:.875rem;color:var(--ink-400);margin-top:.42rem;font-weight:600;line-height:1.5}
.stats--dark .stat{background:rgba(255,255,255,.06);border-color:rgba(255,255,255,.13)}
.stats--dark .stat-value{background:linear-gradient(120deg,var(--teal-300),var(--gold-400));-webkit-background-clip:text;background-clip:text}
.stats--dark .stat-label{color:var(--ink-300)}

/* ---------- 12. 表格 ---------- */
.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);background:#fff;-webkit-overflow-scrolling:touch}
.table-wrap table{min-width:620px;font-size:.9375rem}
caption{caption-side:top;text-align:left;padding:0 0 .8rem;font-weight:700;color:var(--ink-900)}
th,td{padding:.86rem 1.05rem;text-align:left;border-bottom:1px solid var(--border);vertical-align:top;line-height:1.72}
thead th{
  background:var(--ink-800);color:#fff;font-weight:700;font-size:.875rem;
  letter-spacing:.02em;white-space:nowrap;border-bottom:0;
}
tbody tr:last-child td{border-bottom:0}
tbody tr:nth-child(even){background:var(--ink-50)}
tbody tr:hover{background:var(--teal-100)}
td.col-key{font-weight:700;color:var(--ink-900);white-space:nowrap}
.tick{color:var(--ok);font-weight:700}
.cross{color:var(--err);font-weight:700}
.partial{color:var(--warn);font-weight:700}

/* ---------- 13. 提示块 ---------- */
.callout{
  border-radius:var(--radius);padding:1.15rem 1.3rem 1.15rem 1.15rem;
  border-left:4px solid var(--teal-400);background:var(--teal-100);
  display:flex;gap:.85rem;margin-block:1.5rem;
}
.callout-icon{flex:0 0 auto;color:var(--teal-600);margin-top:.15rem}
.callout-body{flex:1;min-width:0}
.callout-title{font-weight:700;color:var(--ink-900);margin-bottom:.3rem;font-size:.985rem}
.callout p{font-size:.9375rem;color:var(--ink-600);margin:0}
.callout--gold{border-color:var(--gold-400);background:var(--gold-100)}
.callout--gold .callout-icon{color:var(--gold-500)}
.callout--plain{background:var(--ink-50);border-color:var(--ink-200)}
.callout--plain .callout-icon{color:var(--ink-400)}

/* 引用 */
blockquote{
  margin:1.7rem 0;padding:.4rem 0 .4rem 1.5rem;
  border-left:4px solid var(--gold-400);
  font-size:1.04rem;color:var(--ink-600);line-height:1.9;font-style:normal;
}
blockquote p{margin-bottom:.5em}
blockquote cite{display:block;font-size:var(--fs-small);color:var(--ink-400);font-style:normal;margin-top:.6rem}
blockquote cite::before{content:"—— "}

/* 定义块（术语词典/问答） */
.def-list{border:1px solid var(--border);border-radius:var(--radius);background:#fff;overflow:hidden}
.def-list>*+*{border-top:1px solid var(--border)}
.def-item{padding:1.25rem 1.4rem}
.def-item dt{font-weight:700;color:var(--ink-900);font-size:1.02rem;margin-bottom:.42rem;display:flex;align-items:baseline;gap:.5rem;flex-wrap:wrap}
.def-item dt .en{font-size:var(--fs-xs);color:var(--teal-500);font-weight:600;letter-spacing:.03em;font-family:var(--font-mono)}
.def-item dd{margin:0;color:var(--ink-500);font-size:.9375rem;line-height:1.85}

/* 步骤 */
.steps{counter-reset:step;list-style:none}
.steps>li{
  counter-increment:step;position:relative;
  padding:0 0 1.7rem 3.5rem;list-style:none;
}
.steps>li::before{
  content:counter(step,decimal-leading-zero);
  position:absolute;left:0;top:-.15rem;
  width:2.5rem;height:2.5rem;border-radius:11px;
  display:flex;align-items:center;justify-content:center;
  background:linear-gradient(135deg,var(--teal-500),var(--teal-600));color:#fff;
  font-family:var(--font-mono);font-weight:700;font-size:.9375rem;
  box-shadow:0 5px 14px rgba(14,156,142,.28);
}
.steps>li::after{
  content:"";position:absolute;left:1.24rem;top:2.6rem;bottom:.3rem;width:2px;
  background:linear-gradient(180deg,var(--teal-300),var(--border));
}
.steps>li:last-child{padding-bottom:0}
.steps>li:last-child::after{display:none}
.steps h3,.steps h4{margin-bottom:.35em;font-size:1.06rem}
.steps p{color:var(--ink-400);font-size:.9375rem;margin:0}

/* 标签 */
.tag{
  display:inline-block;padding:.2rem .62rem;border-radius:6px;
  background:var(--ink-50);border:1px solid var(--border);
  font-size:var(--fs-xs);font-weight:600;color:var(--ink-500);
}
.tag--teal{background:var(--teal-100);border-color:transparent;color:var(--teal-600)}
.tag--gold{background:var(--gold-100);border-color:transparent;color:#8C6112}
.tag-row{display:flex;flex-wrap:wrap;gap:.42rem;margin-top:.85rem}

/* ---------- 14. FAQ 手风琴 ---------- */
.faq-group+.faq-group{margin-top:2.4rem}
.faq-group-title{
  font-size:1.06rem;font-weight:800;color:var(--ink-900);
  padding-bottom:.65rem;margin-bottom:.9rem;border-bottom:2px solid var(--teal-400);
  display:flex;align-items:center;gap:.5rem;
}
.faq-item{border:1px solid var(--border);border-radius:var(--radius-sm);background:#fff;margin-bottom:.6rem;overflow:hidden;transition:border-color var(--t),box-shadow var(--t)}
.faq-item:hover{border-color:var(--teal-300)}
.faq-item.is-open{border-color:var(--teal-400);box-shadow:var(--shadow-1)}
.faq-q{
  width:100%;display:flex;align-items:flex-start;justify-content:space-between;gap:1rem;
  padding:1rem 1.2rem;text-align:left;font-weight:700;font-size:.985rem;color:var(--ink-900);
  background:none;transition:background var(--t),color var(--t);
}
.faq-q:hover{background:var(--ink-50);color:var(--teal-600)}
.faq-q .chev{flex:0 0 auto;color:var(--teal-500);transition:transform var(--t);margin-top:.18rem}
.faq-item.is-open .faq-q{color:var(--teal-600)}
.faq-item.is-open .chev{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .38s var(--ease)}
.faq-a-inner{padding:0 1.2rem 1.15rem;color:var(--ink-500);font-size:.9375rem;line-height:1.88}
.faq-a-inner p{margin-bottom:.75em}
.faq-a-inner ul{margin:.5rem 0 .8rem;padding-left:1.15rem}
.faq-a-inner li{list-style:disc;margin-bottom:.3rem}
.faq-a-inner strong{color:var(--ink-800)}

/* ---------- 15. 文章页 ---------- */
.article-head{padding-block:clamp(2.2rem,4.6vw,3.2rem) clamp(1.4rem,3vw,2rem)}
.article-meta{display:flex;flex-wrap:wrap;gap:.5rem 1.3rem;font-size:var(--fs-xs);color:var(--ink-400);margin-bottom:1rem}
.article-meta span{display:inline-flex;align-items:center;gap:.36rem}
.article-meta svg{color:var(--teal-500)}
.prose{max-width:var(--wrap-narrow);margin-inline:auto;font-size:1.02rem;line-height:1.95;color:var(--ink-600)}
.prose>*+*{margin-top:1.25rem}
.prose h2{
  font-size:clamp(1.3rem,2.3vw,1.62rem);margin-top:2.6rem;margin-bottom:.7rem;
  padding-bottom:.55rem;border-bottom:1px solid var(--border);scroll-margin-top:96px;
}
.prose h3{font-size:1.14rem;margin-top:1.9rem;margin-bottom:.55rem;scroll-margin-top:96px}
.prose p{margin:0}
.prose ul,.prose ol{padding-left:1.35rem}
.prose li{margin-bottom:.5rem}
.prose li::marker{color:var(--teal-500);font-weight:700}
.prose a{text-decoration:underline;text-underline-offset:3px;text-decoration-color:var(--teal-300)}
.prose a:hover{text-decoration-color:var(--teal-500)}
.prose .lede{font-size:1.1rem;color:var(--ink-500);border-left:3px solid var(--teal-400);padding-left:1.1rem}

/* 文章目录 */
.toc{
  background:var(--ink-50);border:1px solid var(--border);border-radius:var(--radius);
  padding:1.2rem 1.4rem;margin:1.8rem 0;
}
.toc-title{font-weight:800;font-size:.9375rem;color:var(--ink-900);margin-bottom:.7rem;display:flex;align-items:center;gap:.45rem}
.toc ol{list-style:none;counter-reset:toc;padding:0;margin:0}
.toc li{counter-increment:toc;font-size:.9375rem;line-height:1.6}
.toc li+li{margin-top:.32rem}
.toc li::before{content:counter(toc) ". ";color:var(--teal-500);font-weight:700;font-family:var(--font-mono);font-size:.85rem}
.toc a{color:var(--ink-500);font-weight:600}
.toc a:hover{color:var(--teal-600)}

/* 文章列表 */
.post-list{display:grid;gap:1rem}
.post-card{
  display:grid;grid-template-columns:1fr auto;gap:1rem 1.4rem;align-items:start;
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:1.3rem 1.5rem;transition:transform var(--t),box-shadow var(--t),border-color var(--t);
}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-2);border-color:var(--teal-300)}
.post-card h3{font-size:1.09rem;margin-bottom:.42rem}
.post-card h3 a{color:var(--ink-900)}
.post-card:hover h3 a{color:var(--teal-600)}
.post-card p{font-size:.9375rem;color:var(--ink-400);margin:0}
.post-card .post-aside{
  display:flex;flex-direction:column;align-items:flex-end;gap:.5rem;
  font-size:var(--fs-xs);color:var(--ink-300);white-space:nowrap;
}
.post-badge{
  padding:.24rem .6rem;border-radius:6px;background:var(--teal-100);
  color:var(--teal-600);font-weight:700;font-size:.75rem;letter-spacing:.03em;
}
.post-badge--gold{background:var(--gold-100);color:#8C6112}

/* 上一/下一 篇 */
.pager{display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));gap:1rem;margin-top:3rem;padding-top:2rem;border-top:1px solid var(--border)}
.pager a{
  background:#fff;border:1px solid var(--border);border-radius:var(--radius-sm);padding:1rem 1.2rem;
  transition:border-color var(--t),transform var(--t),box-shadow var(--t);display:block;
}
.pager a:hover{border-color:var(--teal-400);transform:translateY(-2px);box-shadow:var(--shadow-1)}
.pager .dir{font-size:var(--fs-xs);color:var(--ink-300);font-weight:700;letter-spacing:.08em;text-transform:uppercase;display:block;margin-bottom:.3rem}
.pager .ttl{font-size:.9375rem;font-weight:700;color:var(--ink-800);line-height:1.55}
.pager a:hover .ttl{color:var(--teal-600)}
.pager--next{text-align:right}

/* 作者卡 (E-E-A-T) */
.author-card{
  display:flex;gap:1.1rem;align-items:flex-start;
  background:linear-gradient(135deg,var(--ink-50),#fff);
  border:1px solid var(--border);border-radius:var(--radius);padding:1.3rem 1.4rem;margin-top:2.4rem;
}
.author-avatar{
  width:56px;height:56px;border-radius:50%;flex:0 0 auto;
  background:linear-gradient(135deg,var(--teal-500),var(--teal-600));
  display:flex;align-items:center;justify-content:center;color:#fff;font-weight:800;font-size:1.1rem;
}
.author-card h4{margin-bottom:.2rem;font-size:1rem}
.author-card p{font-size:.875rem;color:var(--ink-400);margin:0;line-height:1.75}

/* ---------- 16. CTA 区块 ---------- */
.cta-band{
  position:relative;overflow:hidden;border-radius:var(--radius-lg);
  background:linear-gradient(140deg,var(--ink-900),var(--ink-700) 58%,var(--teal-600) 165%);
  color:var(--ink-100);padding:clamp(2rem,4.6vw,3.2rem);
}
.cta-band::before{
  content:"";position:absolute;inset:0;opacity:.36;
  background:radial-gradient(620px 340px at 92% 0%,rgba(23,184,166,.5),transparent 62%);
}
.cta-band>*{position:relative;z-index:1}
.cta-band h2{color:#fff;margin-bottom:.45em}
.cta-band p{color:var(--ink-200);max-width:620px}
.cta-inner{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:1.8rem;align-items:center}

/* ---------- 17. 表单 ---------- */
.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:1rem 1.15rem}
.field{display:flex;flex-direction:column;gap:.4rem}
.field--full{grid-column:1/-1}
.field label{font-size:.875rem;font-weight:700;color:var(--ink-800)}
.field label .req{color:var(--err);margin-left:.15rem}
.field input,.field textarea,.field select{
  width:100%;padding:.72rem .9rem;border:1.5px solid var(--ink-200);border-radius:9px;
  background:#fff;font-family:inherit;font-size:.9375rem;color:var(--ink-800);
  transition:border-color var(--t),box-shadow var(--t);
}
.field input::placeholder,.field textarea::placeholder{color:var(--ink-300)}
.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--teal-400);box-shadow:0 0 0 3px rgba(23,184,166,.16);outline:none}
.field textarea{resize:vertical;min-height:112px;line-height:1.7}
.field-hint{font-size:var(--fs-xs);color:var(--ink-300)}
.field-error{font-size:var(--fs-xs);color:var(--err);font-weight:600;display:none}
.field.is-invalid input,.field.is-invalid textarea,.field.is-invalid select{border-color:var(--err)}
.field.is-invalid .field-error{display:block}
.field--check .check-label{display:flex;align-items:flex-start;gap:.55rem;font-weight:600;color:var(--ink-700);line-height:1.55;cursor:pointer}
.field--check input[type="checkbox"]{width:1.1rem;height:1.1rem;margin-top:.2rem;flex:0 0 auto;accent-color:var(--teal-600)}
.field--check.is-invalid .check-label{color:var(--err)}
.form-note{font-size:var(--fs-xs);color:var(--ink-400);margin-top:.9rem;line-height:1.7}
.form-status{margin-top:1rem;padding:.85rem 1.1rem;border-radius:9px;font-size:.9375rem;font-weight:600;display:none}
.form-status.is-ok{display:block;background:var(--teal-100);color:var(--teal-600);border:1px solid var(--teal-300)}
.form-status.is-err{display:block;background:#FDEDEC;color:var(--err);border:1px solid #F5C6C2}

/* ---------- 18. 页脚 ---------- */
.site-footer{background:var(--ink-900);color:var(--ink-300);margin-top:clamp(3rem,6vw,5rem)}
.footer-main{
  display:grid;grid-template-columns:minmax(0,1.5fr) repeat(3,minmax(0,1fr));
  gap:clamp(1.6rem,3.6vw,2.8rem);padding-block:clamp(2.4rem,5vw,3.6rem) clamp(1.8rem,3.6vw,2.6rem);
}
.footer-brand .brand-name{color:#fff}
.footer-brand .brand-sub{color:var(--ink-400)}
.footer-about{font-size:.875rem;line-height:1.88;margin-top:1rem;color:var(--ink-400);max-width:330px}
.footer-contact{list-style:none;margin-top:1.15rem;font-size:.875rem}
.footer-contact li{display:flex;gap:.55rem;padding:.3rem 0;color:var(--ink-300)}
.footer-contact svg{flex:0 0 auto;color:var(--teal-400);margin-top:.28rem}
.footer-contact a{color:var(--ink-200);font-weight:600}
.footer-contact a:hover{color:var(--teal-300)}
.footer-col h3{color:#fff;font-size:.9375rem;font-weight:700;margin-bottom:1rem;letter-spacing:.02em}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:.56rem}
.footer-col a{color:var(--ink-400);font-size:.875rem;transition:color var(--t),padding-left var(--t)}
.footer-col a:hover{color:var(--teal-300);padding-left:3px}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding-block:1.25rem;font-size:.8125rem;color:var(--ink-400);
  display:flex;flex-wrap:wrap;gap:.5rem 1.6rem;align-items:center;justify-content:space-between;
}
.footer-bottom a{color:var(--ink-400)}
.footer-bottom a:hover{color:var(--teal-300)}
.footer-links{display:flex;flex-wrap:wrap;gap:.35rem 1.1rem}
.beian{display:inline-flex;align-items:center;gap:.35rem}

/* ---------- 19. 返回顶部 ---------- */
.to-top{
  position:fixed;right:clamp(1rem,2.6vw,1.8rem);bottom:clamp(1rem,2.6vw,1.8rem);z-index:90;
  width:46px;height:46px;border-radius:13px;
  background:#fff;border:1px solid var(--border);box-shadow:var(--shadow-2);
  display:flex;align-items:center;justify-content:center;color:var(--teal-600);
  opacity:0;visibility:hidden;transform:translateY(12px);
  transition:opacity var(--t),transform var(--t),visibility var(--t),background var(--t);
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--teal-500);color:#fff;border-color:var(--teal-500)}

/* ---------- 20. 滚动动画 ---------- */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .62s var(--ease),transform .62s var(--ease)}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
  .reveal{opacity:1;transform:none}
}

/* ---------- 21. 工具类 ---------- */
.divider{height:1px;background:var(--border);border:0;margin:0}
.band{background:var(--surface);border-block:1px solid var(--border)}
.band--tint{background:linear-gradient(180deg,var(--ink-50),var(--bg))}
.band--dark{background:linear-gradient(160deg,var(--ink-900),var(--ink-700));color:var(--ink-200);border:0}
.band--dark h2,.band--dark h3{color:#fff}
.visually-hidden{
  position:absolute!important;width:1px;height:1px;margin:-1px;padding:0;
  overflow:hidden;clip:rect(0 0 0 0);clip-path:inset(50%);white-space:nowrap;border:0;
}
.code-chip{
  font-family:var(--font-mono);font-size:.85em;background:var(--ink-50);
  border:1px solid var(--border);border-radius:5px;padding:.1rem .38rem;color:var(--teal-600);white-space:nowrap;
}

/* ---------- 22. 响应式 ---------- */
@media (max-width:1440px){
  .header-inner{column-gap:.7rem}
  .brand-sub{display:none}
  .main-nav a{padding:.4rem .42rem;font-size:.8125rem}
  .nav-cta{gap:.4rem}
  .nav-tel{font-size:.8125rem}
}
@media (max-width:1280px){
  .header-inner{column-gap:.55rem}
  .main-nav a{padding:.38rem .32rem;font-size:.75rem}
  .nav-tel{font-size:.75rem}
  .nav-cta .btn--sm{padding:.48rem .72rem;font-size:.75rem}
  .brand-name{font-size:.9375rem}
}
@media (max-width:1100px){
  .nav-tel{display:none}
  .main-nav a{padding:.36rem .28rem;font-size:.75rem}
}
@media (max-width:1080px){
  .grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-main{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (max-width:900px){
  .header-inner{
    display:flex;
    align-items:center;
    gap:.7rem;
    height:72px;
  }
  .brand{margin-right:auto}
  .nav-toggle{display:flex;order:3;margin-left:.2rem}
  .nav-cta{order:2}
  .main-nav{
    order:4;
    position:fixed;inset:72px 0 auto 0;z-index:99;
    justify-self:stretch;width:100%;
    background:#fff;border-bottom:1px solid var(--border);box-shadow:var(--shadow-2);
    max-height:0;overflow:hidden;transition:max-height .38s var(--ease);
  }
  .main-nav.is-open{max-height:calc(100vh - 72px);overflow-y:auto}
  .main-nav ul{flex-direction:column;align-items:stretch;flex-wrap:nowrap;gap:0;padding:.7rem var(--gutter) 1.2rem}
  .main-nav a{
    padding:.82rem .6rem;border-radius:9px;font-size:1rem;
    border-bottom:1px solid var(--ink-50);white-space:normal;
  }
  .nav-cta .btn{display:none}
  .split,.split.split-flip{grid-template-columns:minmax(0,1fr)}
  .grid-3{grid-template-columns:repeat(2,minmax(0,1fr))}
  .cta-inner{grid-template-columns:minmax(0,1fr)}
  .post-card{grid-template-columns:minmax(0,1fr)}
  .post-card .post-aside{flex-direction:row;align-items:center;justify-content:flex-start}
}
@media (max-width:620px){
  .grid-2,.grid-3,.grid-4{grid-template-columns:minmax(0,1fr)}
  .form-grid{grid-template-columns:minmax(0,1fr)}
  .footer-main{grid-template-columns:minmax(0,1fr)}
  .header-inner{height:64px;gap:.7rem}
  .brand-sub{display:none}
  .nav-tel{display:none}
  .main-nav{inset:64px 0 auto 0}
  .main-nav.is-open{max-height:calc(100vh - 64px)}
  html{scroll-padding-top:78px}
  .topbar-inner{justify-content:center;text-align:center;padding-block:.3rem}
  .steps>li{padding-left:3rem}
}

/* ---------- 23. 打印 ---------- */
@media print{
  .site-header,.site-footer,.to-top,.cta-band,.nav-toggle,.btn{display:none!important}
  body{background:#fff;color:#000;font-size:11pt}
  .hero,.page-hero{background:#fff;color:#000;padding:0}
  .hero h1,.page-hero h1{color:#000}
  a{color:#000;text-decoration:underline}
  .card,.stat{border:1px solid #ccc;box-shadow:none;break-inside:avoid}
  .faq-a{max-height:none!important}
}