/* ==========================================================================
   华泉水处理 · 乙酸钠碳源站  公共样式
   版本 2026-11-10
   说明：全站唯一 CSS 入口。改版只改这一处。
   ========================================================================== */

/* ---------- 1. 设计令牌 ---------- */
:root{
  --green:#0d9488;
  --green-dark:#0f766e;
  --green-deep:#115e59;
  --green-soft:#f0fdfa;
  --green-line:#99f6e4;
  --green-mist:#ccfbf1;

  --blue:#0284c7;
  --blue-soft:#e0f2fe;

  --ink:#134e4a;
  --ink2:#334155;
  --ink3:#64748b;
  --ink4:#94a3b8;

  --line:#e2e8f0;
  --line-soft:#eef2f5;
  --bg:#f8fafc;
  --white:#ffffff;

  --amber:#d97706;
  --amber-soft:#fffbeb;
  --danger:#dc2626;

  --radius:14px;
  --radius-sm:10px;
  --radius-lg:20px;

  --shadow:0 1px 3px rgba(15,23,42,.04), 0 4px 16px rgba(15,23,42,.04);
  --shadow-lg:0 8px 32px rgba(15,23,42,.09);

  --font:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Arial,sans-serif;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;

  --header-h:68px;
  --wrap:1160px;
}

/* ---------- 2. 基础重置 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{margin:0;padding:0;scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 16px);-webkit-text-size-adjust:100%}
body{
  margin:0;padding:0;
  font-family:var(--font);
  background:var(--bg);
  color:var(--ink2);
  font-size:15px;
  line-height:1.75;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}
img{max-width:100%;height:auto;display:block;border:0}
a{color:inherit;text-decoration:none}
button{font-family:inherit}
h1,h2,h3,h4,h5,p,ul,ol,dl,dd,figure{margin:0}
h1,h2,h3,h4{color:var(--ink);line-height:1.35;font-weight:800}
ul,ol{padding-left:20px}

/* 无障碍：跳转主内容 + 键盘焦点 */
.skip-link{
  position:absolute;left:-9999px;top:0;z-index:999;
  background:var(--green);color:#fff;padding:10px 18px;border-radius:0 0 8px 0;font-weight:700;font-size:13px;
}
.skip-link:focus{left:0}
:focus-visible{outline:2.5px solid var(--green);outline-offset:2px;border-radius:4px}

/* ---------- 3. 布局容器 ---------- */
.container{width:100%;max-width:var(--wrap);margin:0 auto;padding:0 24px}
.container-narrow{max-width:960px}
.container-wide{max-width:1240px}

.section{padding:64px 0}
.section-alt{background:var(--white);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{text-align:center;margin-bottom:36px}
.section-label{
  display:inline-block;font-size:12px;font-weight:800;letter-spacing:1.6px;
  text-transform:uppercase;color:var(--green);margin-bottom:10px;
}
.section-title{font-size:26px;font-weight:800;color:var(--ink);letter-spacing:-.4px;margin-bottom:10px}
.section-desc{font-size:15px;color:var(--ink3);max-width:580px;margin:0 auto;line-height:1.75}
.section-more{text-align:center;margin-top:26px}

/* ---------- 4. 顶部导航 ---------- */
.site-header{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.94);
  -webkit-backdrop-filter:saturate(180%) blur(14px);
  backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid var(--line);
}
@supports not ((backdrop-filter:blur(1px)) or (-webkit-backdrop-filter:blur(1px))){
  .site-header{background:#fff}
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:var(--header-h)}

.brand{display:flex;align-items:center;gap:11px;flex-shrink:0}
.brand-mark{
  width:38px;height:38px;border-radius:10px;flex-shrink:0;
  background:transparent;
  display:flex;align-items:center;justify-content:center;
  overflow:hidden;
}
.brand-text{font-size:17px;font-weight:800;color:var(--ink);line-height:1.2;letter-spacing:-.2px}
.brand-text small{display:block;font-size:11px;font-weight:500;color:var(--ink3);letter-spacing:0;margin-top:1px}

.nav{display:flex;align-items:center;gap:19px}
.nav a{font-size:14px;color:var(--ink2);font-weight:500;padding:4px 0;position:relative;transition:color .18s}
.nav a:hover{color:var(--green)}
.nav a[aria-current="page"]{color:var(--green);font-weight:700}
.nav a[aria-current="page"]::after{
  content:"";position:absolute;left:0;right:0;bottom:-2px;height:2.5px;border-radius:2px;background:var(--green);
}
/* 二级菜单 */
.nav-item{position:relative;display:flex;align-items:center}
.nav-caret{display:inline-block;width:0;height:0;margin-left:4px;vertical-align:middle;
  border-left:3.5px solid transparent;border-right:3.5px solid transparent;border-top:4px solid currentColor;opacity:.55}
.nav-sub{
  position:absolute;top:100%;left:-14px;min-width:220px;margin:0;padding:8px;list-style:none;
  background:#fff;border:1px solid var(--line);border-radius:12px;
  box-shadow:0 12px 32px rgba(15,23,42,.13);
  opacity:0;visibility:hidden;transform:translateY(6px);transition:opacity .16s,transform .16s,visibility .16s;z-index:60;
}
.nav-item:hover .nav-sub,.nav-item:focus-within .nav-sub{opacity:1;visibility:visible;transform:translateY(0)}
.nav-sub li{margin:0}
.nav-sub a{display:block;padding:9px 12px;border-radius:8px;font-size:13.5px;color:var(--ink2);white-space:nowrap}
.nav-sub a:hover{background:var(--green-50,#f0fdfa);color:var(--green)}
.drawer-sub{padding-left:28px !important;font-size:13.5px !important;color:var(--ink3) !important}
.header-actions{display:flex;align-items:center;gap:10px;flex-shrink:0}

/* 汉堡按钮 */
.nav-toggle{
  display:none;width:40px;height:40px;border-radius:10px;border:1px solid var(--line);
  background:#fff;cursor:pointer;padding:0;align-items:center;justify-content:center;
}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px;position:relative;transition:background .2s}
.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink);border-radius:2px;transition:transform .22s;
}
.nav-toggle span::before{top:-6px}
.nav-toggle span::after{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)}

/* 移动端抽屉 */
.mobile-drawer{
  position:fixed;inset:var(--header-h) 0 0 0;z-index:99;background:#fff;
  transform:translateX(100%);transition:transform .26s ease;
  overflow-y:auto;padding:18px 24px 40px;display:none;
}
.mobile-drawer.open{transform:translateX(0)}
.mobile-drawer a{
  display:flex;align-items:center;justify-content:space-between;
  padding:15px 2px;font-size:15.5px;font-weight:600;color:var(--ink);
  border-bottom:1px solid var(--line-soft);
}
.mobile-drawer a::after{content:"›";color:var(--ink4);font-size:19px;font-weight:400}
.mobile-drawer .drawer-cta{display:grid;gap:10px;margin-top:22px}
.mobile-drawer .drawer-meta{margin-top:26px;font-size:12.5px;color:var(--ink3);line-height:1.9}
.mobile-drawer .drawer-meta a{display:inline;border:0;padding:0;font-weight:600;color:var(--green);font-size:13px}
.mobile-drawer .drawer-meta a::after{content:""}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:10px 18px;border-radius:var(--radius-sm);
  font-size:13.5px;font-weight:700;border:1.5px solid transparent;
  cursor:pointer;transition:all .18s;text-align:center;line-height:1.4;
  font-family:inherit;
}
.btn-primary{background:var(--green);color:#fff;box-shadow:0 2px 8px rgba(13,148,136,.24)}
.btn-primary:hover{background:var(--green-dark);box-shadow:0 4px 14px rgba(13,148,136,.3)}
.btn-outline{background:#fff;color:var(--green-dark);border-color:var(--green-line)}
.btn-outline:hover{background:var(--green-soft);border-color:var(--green)}
.btn-ghost{background:var(--green-soft);color:var(--green-dark);border-color:var(--green-mist)}
.btn-ghost:hover{background:var(--green-mist)}
.btn-white{background:#fff;color:var(--green-dark);box-shadow:0 2px 12px rgba(0,0,0,.1)}
.btn-white:hover{background:#f8fafc}
.btn-lg{padding:13px 26px;font-size:14.5px;border-radius:12px}
.btn-block{display:flex;width:100%}

/* ---------- 6. 首页 Hero ---------- */
.hero{
  padding:56px 0 62px;
  background:
    radial-gradient(ellipse 80% 60% at 90% 8%,rgba(13,148,136,.075) 0%,transparent 52%),
    radial-gradient(ellipse 55% 45% at 4% 92%,rgba(5,150,105,.05) 0%,transparent 46%),
    var(--white);
  border-bottom:1px solid var(--line);
}
.hero-grid{display:grid;grid-template-columns:1.12fr .88fr;gap:48px;align-items:center}
.hero-badge{
  display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:20px;
  background:var(--green-soft);border:1px solid var(--green-line);color:var(--green-dark);
  font-size:12.5px;font-weight:700;margin-bottom:18px;
}
.hero h1{font-size:36px;line-height:1.26;font-weight:800;letter-spacing:-.8px;margin-bottom:16px}
.hero h1 em{font-style:normal;color:var(--green)}
.hero-desc{font-size:15.5px;color:var(--ink3);line-height:1.85;max-width:520px;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:12px}
.stat-card{background:var(--green-soft);border:1px solid var(--green-mist);border-radius:12px;padding:14px 10px;text-align:center}
.stat-card strong{display:block;font-size:19px;font-weight:800;color:var(--green-dark);line-height:1.2}
.stat-card span{font-size:11.5px;color:var(--ink3);line-height:1.4;display:block;margin-top:2px}

.hero-side{display:flex;flex-direction:column;gap:11px}
.side-card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:16px 18px;box-shadow:var(--shadow);display:flex;gap:13px;align-items:flex-start;
  transition:box-shadow .2s,border-color .2s,transform .2s;
}
.side-card:hover{box-shadow:var(--shadow-lg);border-color:var(--green-line);transform:translateY(-1px)}
.side-card .ico{
  width:38px;height:38px;border-radius:10px;background:var(--green-soft);color:var(--green);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.side-card h4{font-size:14.5px;font-weight:700;margin-bottom:2px}
.side-card p{font-size:12.5px;color:var(--ink3);line-height:1.55}

/* ---------- 7. 卡片网格 ---------- */
.grid{display:grid;gap:18px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-5{grid-template-columns:repeat(5,1fr)}

.card{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow);
}
.card-hover{transition:box-shadow .22s,border-color .22s,transform .22s}
.card-hover:hover{box-shadow:var(--shadow-lg);border-color:var(--green-line);transform:translateY(-2px)}
.card h3{font-size:18px;font-weight:800;margin-bottom:8px}
.card h4{font-size:15px;font-weight:700;margin-bottom:5px}
.card p{font-size:13.8px;color:var(--ink3);line-height:1.68}
.card .more{font-size:13.5px;font-weight:700;color:var(--green);display:inline-block;margin-top:12px}
.card .more:hover{color:var(--green-dark)}

/* 产品大类卡 */
.pcard{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);transition:all .24s;position:relative}
.pcard:hover{box-shadow:var(--shadow-lg);border-color:var(--green-line);transform:translateY(-2px)}
.pcard.tone-liquid{border-top:3px solid var(--green)}
.pcard.tone-solid{border-top:3px solid var(--blue)}
.pcard .eyebrow{font-size:11.5px;font-weight:800;letter-spacing:1.2px;text-transform:uppercase;color:var(--green);margin-bottom:8px}
.pcard.tone-solid .eyebrow{color:var(--blue)}
.pcard h3{font-size:19px;font-weight:800;margin-bottom:9px}
.pcard > p{font-size:13.8px;color:var(--ink3);margin-bottom:14px;line-height:1.65}
.pcard .link{font-size:13.5px;font-weight:700;color:var(--green)}
.pcard.tone-solid .link{color:var(--blue)}

/* 小图标卡（无图时的图标位） */
.icon-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow);transition:all .2s}
.icon-card:hover{border-color:var(--green-line);box-shadow:var(--shadow-lg);transform:translateY(-2px)}
.icon-card .ico{
  width:42px;height:42px;border-radius:12px;background:var(--green-soft);color:var(--green);
  display:flex;align-items:center;justify-content:center;margin-bottom:12px;
}
.icon-card h4{font-size:15px;font-weight:700;margin-bottom:5px;line-height:1.45}
.icon-card p{font-size:13px;color:var(--ink3);line-height:1.6;margin-bottom:9px}
.icon-card .more{font-size:12.8px;font-weight:700;color:var(--green)}

/* 数据条 */
.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:26px}
.stat-box{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-sm);padding:20px 14px;text-align:center;box-shadow:var(--shadow)}
.stat-box strong{display:block;font-size:25px;font-weight:800;color:var(--green);line-height:1.15;margin-bottom:3px}
.stat-box span{font-size:12.5px;color:var(--ink3);line-height:1.45;display:block}

/* ---------- 8. 标签 ---------- */
.tags{display:flex;flex-wrap:wrap;gap:7px}
.tag{font-size:12px;padding:4px 11px;border-radius:7px;background:var(--bg);border:1px solid var(--line);color:var(--ink2);font-weight:500;line-height:1.5}
.tag-solid{background:var(--green-soft);border-color:var(--green-mist);color:var(--green-dark);font-weight:600}
.pill{display:inline-block;font-size:12px;padding:4px 12px;border-radius:20px;background:var(--green-soft);color:var(--green-dark);font-weight:600}

/* 状态徽标 */
.badge{display:inline-block;font-size:11.5px;font-weight:800;padding:3px 9px;border-radius:6px;letter-spacing:.3px;line-height:1.5}
.badge-ok{background:var(--green-soft);color:var(--green-dark);border:1px solid var(--green-line)}
.badge-warn{background:var(--amber-soft);color:#b45309;border:1px solid #fde68a}
.badge-info{background:var(--blue-soft);color:#0369a1;border:1px solid #bae6fd}

/* ---------- 9. 列表页 ---------- */
.list{display:flex;flex-direction:column;gap:13px}
.list-item{
  display:grid;grid-template-columns:auto 1fr;gap:16px;align-items:start;
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px 22px;transition:border-color .2s,box-shadow .2s;
}
.list-item:hover{border-color:var(--green-line);box-shadow:var(--shadow)}
.list-item .lead-ico{
  width:40px;height:40px;border-radius:11px;background:var(--green-soft);color:var(--green);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.list-item .cat{
  flex-shrink:0;font-size:11.5px;font-weight:800;color:var(--green-dark);
  background:var(--green-soft);padding:4px 10px;border-radius:6px;white-space:nowrap;line-height:1.6;
}
.list-item h3{font-size:15.5px;font-weight:700;margin-bottom:5px;line-height:1.5}
.list-item h3 a:hover{color:var(--green)}
.list-item p{font-size:13.5px;color:var(--ink3);line-height:1.65}
.list-item .meta-row-mini{margin-top:8px;display:flex;gap:10px;flex-wrap:wrap;align-items:center;font-size:12px;color:var(--ink4)}

/* ---------- 10. 面包屑 ---------- */
.breadcrumb{padding:16px 0 6px;font-size:12.8px;color:var(--ink3);line-height:1.7}
.breadcrumb ol{list-style:none;padding:0;margin:0;display:flex;flex-wrap:wrap;gap:6px}
.breadcrumb li{display:inline-flex;align-items:center;gap:6px}
.breadcrumb li:not(:last-child)::after{content:"›";color:var(--ink4)}
.breadcrumb a:hover{color:var(--green)}
.breadcrumb [aria-current]{color:var(--ink2);font-weight:600}

/* ---------- 11. 产品详情页 ---------- */
.product-hero{
  background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);
  padding:32px 34px;margin-bottom:22px;
  display:grid;grid-template-columns:1fr 300px;gap:32px;
  box-shadow:var(--shadow);
}
.product-hero h1{font-size:27px;font-weight:800;margin-bottom:8px;letter-spacing:-.4px}
.product-hero .subtitle{font-size:14.5px;color:var(--ink3);margin-bottom:14px}
.kv-list{display:grid;grid-template-columns:96px 1fr;gap:7px 16px;font-size:13.5px;margin-bottom:12px}
.kv-list dt{color:var(--ink3)}
.kv-list dd{font-weight:600;color:var(--ink)}
.fineprint{font-size:12.5px;color:var(--ink3);line-height:1.7}

.cta-box{
  background:linear-gradient(150deg,var(--green),var(--green-deep));
  border-radius:var(--radius);padding:24px;color:#fff;
  display:flex;flex-direction:column;gap:10px;align-self:start;
}
.cta-box h3{font-size:15.5px;font-weight:800;color:#fff}
.cta-box p{font-size:12.8px;opacity:.92;line-height:1.6;margin-bottom:2px}
.cta-box .btn{width:100%}
.cta-box .btn-outline{background:transparent;color:#fff;border-color:rgba(255,255,255,.45)}
.cta-box .btn-outline:hover{background:rgba(255,255,255,.12)}
.cta-box .btn-white{background:#fff;color:var(--green-deep)}

.panel{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:26px 30px;margin-bottom:16px;box-shadow:var(--shadow)}
.panel h2{
  font-size:18px;font-weight:800;margin-bottom:14px;padding-bottom:10px;
  border-bottom:2px solid var(--green-soft);display:flex;align-items:center;gap:10px;
}
.panel h2 .num{
  width:26px;height:26px;border-radius:7px;background:var(--green);color:#fff;
  font-size:13px;font-weight:800;display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.panel h3{font-size:15px;font-weight:700;color:var(--green-dark);margin:18px 0 8px}
.panel p{margin-bottom:10px;font-size:14.5px}
.panel ul,.panel ol{margin-bottom:12px;font-size:14.5px}
.panel li{margin-bottom:6px}
.panel > *:last-child{margin-bottom:0}

/* 表格 */
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:12px 0 16px;border-radius:var(--radius-sm);border:1px solid var(--line)}
table.data{width:100%;border-collapse:collapse;font-size:13.5px;background:var(--white);min-width:520px}
table.data th{background:#eef4f3;text-align:left;padding:11px 14px;font-weight:700;color:var(--ink);border-bottom:1px solid var(--line);white-space:nowrap;font-size:13px}
table.data td{padding:11px 14px;border-bottom:1px solid var(--line-soft);vertical-align:top}
table.data tr:last-child td{border-bottom:none}
table.data tbody tr:nth-child(even) td{background:#fafcfc}
table.data td.num,table.data th.num{text-align:right;font-variant-numeric:tabular-nums}
table.data .row-total td{background:var(--green-soft);font-weight:700;color:var(--ink)}

/* 公式 / 算例 / 提示 */
.formula{
  background:var(--green-soft);border-left:4px solid var(--green);border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  padding:15px 18px;margin:14px 0;font-family:var(--mono);font-size:13.5px;line-height:1.9;color:var(--ink);
}
.example{background:var(--bg);border:1px dashed #cbd5e1;border-radius:var(--radius-sm);padding:16px 18px;margin:14px 0}
.example h4{font-size:14px;font-weight:700;margin-bottom:7px;color:var(--ink)}
.example p{font-size:13.8px;margin-bottom:6px}
.example p:last-child{margin-bottom:0}

.note{border-radius:var(--radius-sm);padding:14px 18px;margin:14px 0;font-size:13.8px;line-height:1.75}
.note strong{display:block;margin-bottom:3px}
.note-info{background:#f1f5f9;color:var(--ink2)}
.note-info strong{color:var(--ink)}
.note-warn{background:var(--amber-soft);color:#78350f;border:1px solid #fde68a}
.note-warn strong{color:#b45309}
.note-ok{background:var(--green-soft);color:#134e4a;border:1px solid var(--green-line)}
.note-ok strong{color:var(--green-dark)}

/* FAQ 手风琴（原生 details，零 JS） */
.faq-item{border-bottom:1px solid var(--line-soft);padding:2px 0}
.faq-item:last-child{border-bottom:none}
.faq-item summary{
  cursor:pointer;list-style:none;padding:14px 30px 14px 0;position:relative;
  font-size:14.8px;font-weight:700;color:var(--ink);line-height:1.6;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";position:absolute;right:4px;top:13px;font-size:19px;font-weight:400;color:var(--green);transition:transform .2s;
}
.faq-item[open] summary::after{content:"−";transform:rotate(0)}
.faq-item summary:hover{color:var(--green-dark)}
.faq-body{padding:0 30px 16px 0;font-size:14px;color:var(--ink2);line-height:1.8}

/* 相关阅读 */
.related{display:grid;grid-template-columns:repeat(3,1fr);gap:13px;margin-top:12px}
.related-card{border:1px solid var(--line);border-radius:var(--radius-sm);padding:15px;transition:border-color .2s,box-shadow .2s;display:block;background:var(--white)}
.related-card:hover{border-color:var(--green-line);box-shadow:var(--shadow)}
.related-card h4{font-size:13.8px;font-weight:700;margin-bottom:4px;line-height:1.45}
.related-card p{font-size:12.5px;color:var(--ink3);margin:0;line-height:1.55}

/* ---------- 12. 文章页排版 ---------- */
.article-head{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px 34px;margin-bottom:18px;box-shadow:var(--shadow)}
.article-head h1{font-size:26px;font-weight:800;line-height:1.38;margin-bottom:12px;letter-spacing:-.3px}
.article-meta{display:flex;flex-wrap:wrap;gap:8px 14px;font-size:12.5px;color:var(--ink3);align-items:center}
.article-meta .dot{color:var(--line)}
.article-body{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:30px 34px;box-shadow:var(--shadow)}
.article-body h2{font-size:19px;font-weight:800;margin:26px 0 12px;padding-left:12px;border-left:4px solid var(--green);line-height:1.45}
.article-body h2:first-child{margin-top:0}
.article-body h3{font-size:16px;font-weight:700;color:var(--green-dark);margin:20px 0 9px}
.article-body p{font-size:15px;line-height:1.9;margin-bottom:13px;color:var(--ink2)}
.article-body ul,.article-body ol{margin-bottom:14px;font-size:15px;line-height:1.9}
.article-body li{margin-bottom:6px}
.article-body strong{color:var(--ink);font-weight:700}
.article-body .keytake{background:var(--green-soft);border:1px solid var(--green-line);border-radius:var(--radius-sm);padding:16px 20px;margin:0 0 20px}
.article-body .keytake > strong{display:block;color:var(--green-dark);font-size:13px;letter-spacing:.5px;margin-bottom:6px;text-transform:uppercase}
.article-body .keytake p strong{color:var(--green-dark);font-weight:700}
.article-body .keytake p{margin:0;font-size:14.3px}
.author-box{display:flex;gap:14px;align-items:flex-start;background:var(--bg);border:1px solid var(--line);border-radius:var(--radius-sm);padding:16px 18px;margin-top:24px}
.author-box .avatar{width:46px;height:46px;border-radius:50%;background:linear-gradient(145deg,var(--green),#14b8a6);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;flex-shrink:0}
.author-box p{font-size:13.3px;color:var(--ink3);margin:0;line-height:1.7}
.author-box strong{display:block;color:var(--ink);font-size:14px;margin-bottom:2px}

/* ---------- 13. 计算器 ---------- */
.calc-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius-lg);padding:30px 34px;box-shadow:var(--shadow);margin-bottom:22px}
.calc-card h2{font-size:19px;font-weight:800;margin-bottom:6px}
.calc-card .sub{font-size:13.5px;color:var(--ink3);margin-bottom:22px;line-height:1.7}
.form-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px 20px}
.field label{display:block;font-size:13px;font-weight:700;color:var(--ink);margin-bottom:6px}
.field .hint{display:block;font-size:11.8px;color:var(--ink4);font-weight:400;margin-top:3px;line-height:1.5}
.field input,.field select{
  width:100%;padding:11px 13px;border:1.5px solid var(--line);border-radius:var(--radius-sm);
  font-size:14.5px;font-family:inherit;color:var(--ink);background:#fff;transition:border-color .18s,box-shadow .18s;
}
.field input:focus,.field select:focus{outline:none;border-color:var(--green);box-shadow:0 0 0 3px rgba(13,148,136,.12)}
.field input[readonly]{background:var(--bg);color:var(--ink3)}
.btn-row{display:flex;gap:10px;flex-wrap:wrap;margin-top:22px}

.result{display:none;margin-top:26px}
.result.show{display:block}
.result-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:14px}
.result-head h3{font-size:15.5px;font-weight:800;color:var(--green-dark)}
.result-note{font-size:12px;color:var(--ink3)}
.cmp-table{width:100%;border-collapse:collapse;font-size:13px;background:#fff;border:1px solid var(--green-line);border-radius:var(--radius-sm);overflow:hidden}
.cmp-table th{background:var(--green-soft);color:var(--green-deep);padding:10px 12px;font-weight:800;font-size:12.5px;text-align:right;white-space:nowrap}
.cmp-table th:first-child{text-align:left}
.cmp-table td{padding:11px 12px;border-top:1px solid var(--line-soft);text-align:right;font-variant-numeric:tabular-nums}
.cmp-table td:first-child{text-align:left;font-weight:700;color:var(--ink);white-space:nowrap}
.cmp-table tr.best td{background:#fffbeb}
.cmp-table .best-flag{display:inline-block;font-size:10.5px;font-weight:800;background:#f59e0b;color:#1c1000;padding:1px 6px;border-radius:4px;margin-left:5px;vertical-align:middle}
.lead-hook{margin-top:22px;background:linear-gradient(150deg,var(--green),var(--green-deep));border-radius:var(--radius);padding:24px 26px;color:#fff}
.lead-hook h4{font-size:16px;font-weight:800;color:#fff;margin-bottom:6px}
.lead-hook p{font-size:13.3px;opacity:.92;margin-bottom:16px;line-height:1.65}
.hook-form{display:grid;grid-template-columns:1fr 1fr auto;gap:10px}
.hook-form input{padding:11px 14px;border-radius:9px;border:1.5px solid rgba(255,255,255,.35);background:rgba(255,255,255,.14);color:#fff;font-size:14px;font-family:inherit}
.hook-form input::placeholder{color:rgba(255,255,255,.72)}
.hook-form input:focus{outline:none;background:rgba(255,255,255,.22);border-color:#fff}
.hook-form button{padding:11px 22px;border-radius:9px;border:none;background:#fff;color:var(--green-deep);font-weight:800;font-size:14px;cursor:pointer;font-family:inherit;white-space:nowrap}
.hook-form button:hover{background:#f0fdfa}

/* ---------- 14. 表单 ---------- */
.form-field{margin-bottom:15px}
.form-field label{display:block;font-size:13px;font-weight:700;color:var(--ink);margin-bottom:5px}
.form-field label .req{color:var(--danger)}
.form-field input,.form-field select,.form-field textarea{
  width:100%;padding:11px 14px;border:1.5px solid var(--line);border-radius:var(--radius-sm);
  font-size:14px;font-family:inherit;color:var(--ink);background:#fff;transition:border-color .18s,box-shadow .18s;
}
.form-field textarea{min-height:104px;resize:vertical;line-height:1.7}
.form-field input:focus,.form-field select:focus,.form-field textarea:focus{outline:none;border-color:var(--green);box-shadow:0 0 0 3px rgba(13,148,136,.12)}
.form-field .hint{display:block;font-size:11.8px;color:var(--ink4);margin-top:4px;line-height:1.55}
.form-consent{display:flex;gap:9px;align-items:flex-start;font-size:12.5px;color:var(--ink3);line-height:1.6;margin:4px 0 16px}
.form-consent input{width:16px;height:16px;margin-top:2px;flex-shrink:0;accent-color:var(--green)}
.form-consent a{color:var(--green-dark);text-decoration:underline}

/* ---------- 15. 联系信息块 ---------- */
.contact-list{list-style:none;padding:0;margin:0}
.contact-list li{display:flex;gap:12px;padding:13px 0;border-bottom:1px dashed var(--line);align-items:flex-start}
.contact-list li:last-child{border-bottom:none}
.contact-list .ci{width:34px;height:34px;border-radius:9px;background:var(--green-soft);color:var(--green);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.contact-list .ct{font-size:12px;color:var(--ink3);margin-bottom:1px}
.contact-list .cv{font-size:14.5px;font-weight:700;color:var(--ink);line-height:1.5}
.contact-list .cv a{color:var(--green-dark)}
.qr-box{text-align:center;background:var(--green-soft);border:1px solid var(--green-line);border-radius:var(--radius-sm);padding:16px}
.qr-box img,.qr-box .qr-slot{width:136px;height:136px;margin:0 auto 8px;border-radius:8px;background:#fff;border:1px solid var(--line)}
.qr-box .qr-slot{display:flex;align-items:center;justify-content:center;text-align:center;font-size:11.5px;color:var(--ink4);line-height:1.5;padding:8px}
.qr-box span{font-size:12.5px;color:var(--ink3)}

/* ---------- 16. 图片占位框（待补实拍图） ---------- */
.img-slot{
  background:repeating-linear-gradient(45deg,#f1f5f9,#f1f5f9 10px,#f8fafc 10px,#f8fafc 20px);
  border:1.5px dashed #cbd5e1;border-radius:var(--radius-sm);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:6px;
  color:var(--ink4);font-size:12.5px;text-align:center;padding:18px;min-height:150px;
}
.img-slot strong{color:var(--ink3);font-size:13px;font-weight:700}

/* ---------- 17. 行动号召条 ---------- */
.cta-band{
  background:linear-gradient(135deg,var(--green),var(--green-deep));
  border-radius:var(--radius-lg);padding:46px 40px;text-align:center;color:#fff;
  box-shadow:0 12px 40px rgba(13,148,136,.22);
}
.cta-band h2{font-size:25px;font-weight:800;margin-bottom:10px;color:#fff}
.cta-band p{font-size:14.8px;opacity:.93;max-width:520px;margin:0 auto 24px;line-height:1.75}
.cta-band .cta-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* 侧边悬浮联系（移动端底部条） */
.side-contact{
  position:fixed;right:22px;bottom:24px;z-index:150;
  display:flex;flex-direction:column;align-items:flex-end;gap:12px;
}
.sc-panel{
  width:300px;background:#fff;border-radius:var(--radius);box-shadow:0 12px 48px rgba(15,23,42,.17);
  border:1px solid var(--line);overflow:hidden;display:none;flex-direction:column;
}
.sc-panel.open{display:flex}
.sc-panel-head{background:linear-gradient(135deg,var(--green),var(--green-deep));color:#fff;padding:15px 18px;display:flex;justify-content:space-between;align-items:center}
.sc-panel-head strong{font-size:14.5px;font-weight:700;color:#fff}
.sc-panel-head button{background:transparent;border:none;color:#fff;font-size:20px;cursor:pointer;line-height:1;padding:0 2px}
.sc-panel-body{padding:16px 18px}
.sc-panel-body p{font-size:13px;color:var(--ink3);margin-bottom:13px;line-height:1.6}
.sc-opts{display:flex;flex-direction:column;gap:8px}
.sc-opt{display:flex;align-items:center;gap:10px;padding:11px 13px;border-radius:9px;background:var(--green-soft);border:1px solid var(--green-mist);font-size:13.5px;font-weight:600;color:var(--ink)}
.sc-opt:hover{background:var(--green-mist)}
.sc-toggle{
  width:56px;height:56px;border-radius:50%;border:none;cursor:pointer;
  background:linear-gradient(145deg,var(--green),var(--green-deep));color:#fff;
  box-shadow:0 6px 24px rgba(13,148,136,.38);
  display:flex;align-items:center;justify-content:center;
}
.sc-toggle:hover{transform:scale(1.04)}

/* 移动端底部固定行动条 */
.mobile-bar{display:none}

/* ---------- 18. 页脚 ---------- */
.site-footer{background:#0f172a;color:#94a3b8;padding:52px 0 22px;font-size:13px;line-height:1.85}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:34px;margin-bottom:34px}
.site-footer h4{color:#e2e8f0;font-size:13.5px;font-weight:800;margin-bottom:13px;letter-spacing:.2px}
.site-footer p{font-size:13px;color:#94a3b8;line-height:1.9;margin-bottom:9px}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer li{margin-bottom:7px}
.site-footer a{color:#94a3b8;transition:color .18s}
.site-footer a:hover{color:#5eead4}
.footer-contact{margin-top:13px;color:#cbd5e1;font-size:13px}
.footer-contact strong{color:#e2e8f0}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.08);padding-top:18px;
  display:flex;justify-content:space-between;gap:8px 20px;flex-wrap:wrap;
  font-size:12.2px;color:#7c8ba1;line-height:1.9;
}
.footer-bottom a{color:#94a3b8}
.footer-bottom a:hover{color:#5eead4}
.footer-legal{font-size:12px;color:#64748b;line-height:1.9;margin-top:10px}

/* ---------- 19. 响应式 ---------- */
@media(max-width:1080px){
  .hero-grid{gap:32px}
  .footer-grid{grid-template-columns:1.4fr 1fr 1fr;gap:26px}
}

@media(max-width:960px){
  :root{--header-h:62px}
  .nav{display:none}
  .header-actions .btn-outline{display:none}
  .nav-toggle{display:flex}
  .mobile-drawer{display:block}

  .hero{padding:38px 0 44px}
  .hero-grid,.product-hero,.form-grid,.grid-2,.grid-3,.grid-4,.related{grid-template-columns:1fr}
  .grid-5{grid-template-columns:repeat(2,1fr)}
  .hero h1{font-size:27px;letter-spacing:-.4px}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .stat-row{grid-template-columns:repeat(2,1fr)}
  .section{padding:46px 0}
  .section-title{font-size:22px}
  .product-hero{padding:24px 22px}
  .panel,.calc-card,.article-body,.article-head{padding:22px 22px}
  .cta-band{padding:32px 22px}
  .cta-band h2{font-size:21px}
  .hook-form{grid-template-columns:1fr}
  .hook-form button{width:100%}
  .footer-grid{grid-template-columns:1fr 1fr;gap:24px}
  .side-contact .sc-panel{position:fixed;right:12px;left:12px;width:auto;bottom:88px}
}

@media(max-width:640px){
  .container{padding:0 18px}
  .grid-5,.grid-4{grid-template-columns:1fr}
  .list-item{grid-template-columns:1fr;gap:9px;padding:17px 18px}
  .list-item .lead-ico{display:none}
  .list-item .cat{justify-self:start}
  .footer-grid{grid-template-columns:1fr}
  .section-head{text-align:left;margin-bottom:24px}
  .section-desc{margin:0}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
  .footer-bottom{flex-direction:column;gap:4px}
  .article-body h2{font-size:17px}
  .article-body p,.article-body li{font-size:14.6px}
}

/* 移动端底部固定行动条：只在手机显示 */
@media(max-width:640px){
  .mobile-bar{
    display:grid;grid-template-columns:1fr 1fr;gap:1px;
    position:fixed;left:0;right:0;bottom:0;z-index:140;
    background:var(--line);border-top:1px solid var(--line);
  }
  .mobile-bar a{
    display:flex;align-items:center;justify-content:center;gap:7px;
    padding:13px 8px;background:#fff;font-size:14px;font-weight:700;color:var(--ink);
  }
  .mobile-bar a.primary{background:var(--green);color:#fff}
  .side-contact{bottom:70px;right:14px}
  .sc-toggle{width:48px;height:48px}
  body{padding-bottom:52px}
}

/* ---------- 20. 打印 ---------- */
@media print{
  .site-header,.site-footer,.side-contact,.mobile-bar,.cta-band,.lead-hook,.breadcrumb{display:none!important}
  body{background:#fff;font-size:12pt}
  .panel,.card,.product-hero,.article-body{border:1px solid #ddd;box-shadow:none;break-inside:avoid}
}

/* ---------- 21. 动效偏好 ---------- */
@media (prefers-reduced-motion:reduce){
  *{animation-duration:.01ms!important;transition-duration:.01ms!important;scroll-behavior:auto!important}
}