/* ==========================================================================
   CW Packing — design system
   Editorial luxury: Cormorant Garamond display + Inter text, matte gold accents
   ========================================================================== */

:root{
  --ink:#14120F;
  --ink-soft:#2A2721;
  --paper:#FAF8F4;
  --paper-2:#F2EDE4;
  --paper-3:#E8E1D5;
  --gold:#A9854A;
  --gold-light:#C9A971;
  --gold-pale:#E4D6BA;
  --muted:#6E675C;
  --muted-2:#948C7E;
  --line:rgba(20,18,15,.12);
  --line-soft:rgba(20,18,15,.07);
  --line-dark:rgba(255,255,255,.14);
  --ok:#3E6B4F;
  --warn:#9A5B2A;

  --f-display:"Cormorant Garamond",Georgia,"Times New Roman",serif;
  --f-text:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;

  --w:1320px;
  --pad:clamp(20px,4vw,64px);
  --sec:clamp(64px,8vw,132px);
  --r:2px;
  --shadow:0 24px 60px -32px rgba(20,18,15,.34);
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;background:var(--paper);color:var(--ink);
  font-family:var(--f-text);font-size:16px;line-height:1.72;
  font-weight:380;letter-spacing:.005em;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;height:auto;display:block}
/* <picture> 只做 WebP/JPEG 格式切换，不参与布局：让它不产生盒子，
   这样 .hero-img img / .card-media img / .finish-media img 等选择器全部照常命中。 */
picture{display:contents}
a{color:inherit;text-decoration:none}
button{font:inherit}
::selection{background:var(--gold-pale);color:var(--ink)}

/* ---------------------------------------------------------------- layout */
.wrap{max-width:var(--w);margin:0 auto;padding:0 var(--pad)}
.wrap-wide{max-width:1600px;margin:0 auto;padding:0 var(--pad)}
.sec{padding:var(--sec) 0}
.sec-sm{padding:calc(var(--sec) * .55) 0}
.sec-dark{background:var(--ink);color:var(--paper)}
.sec-paper2{background:var(--paper-2)}
.hair{height:1px;background:var(--line);border:0;margin:0}
.sec-dark .hair{background:var(--line-dark)}

.grid{display:grid;gap:clamp(28px,4vw,64px)}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:clamp(32px,6vw,96px);align-items:center}
.split-wide{grid-template-columns:1.15fr .85fr}
.split-wide-r{grid-template-columns:.85fr 1.15fr}
.stack-24>*+*{margin-top:24px}
.stack-16>*+*{margin-top:16px}
.center{text-align:center}
.mt-s{margin-top:20px}.mt-m{margin-top:36px}.mt-l{margin-top:56px}
.mb-m{margin-bottom:36px}
.narrow{max-width:760px}
.narrow-c{margin-left:auto;margin-right:auto}

/* ---------------------------------------------------------------- type */
.eyebrow{
  font-size:11px;font-weight:600;letter-spacing:.22em;text-transform:uppercase;
  color:var(--gold);margin:0 0 18px;display:flex;align-items:center;gap:12px;
}
.eyebrow::before{content:"";width:28px;height:1px;background:var(--gold);flex:none}
.eyebrow.c::before{display:none}
.sec-dark .eyebrow{color:var(--gold-light)}

h1,h2,h3,h4{font-family:var(--f-display);font-weight:400;margin:0;line-height:1.06;letter-spacing:-.012em}
h1{font-size:clamp(42px,6.4vw,84px)}
h2{font-size:clamp(32px,4.3vw,58px)}
h3{font-size:clamp(24px,2.6vw,34px);line-height:1.14}
h4{font-size:clamp(19px,1.8vw,23px);line-height:1.22}
h1 em,h2 em,h3 em{font-style:italic;color:var(--gold)}
.sec-dark h1 em,.sec-dark h2 em{color:var(--gold-light)}

.lede{font-size:clamp(17px,1.6vw,20px);line-height:1.68;color:var(--ink-soft);font-weight:350}
.sec-dark .lede{color:rgba(250,248,244,.78)}
p{margin:0 0 1.1em}
p:last-child{margin-bottom:0}
.small{font-size:13.5px;line-height:1.66;color:var(--muted)}
.sec-dark .small{color:rgba(250,248,244,.6)}
.tiny{font-size:12px;line-height:1.6;color:var(--muted-2)}
strong{font-weight:600}
.num{font-family:var(--f-display);font-size:clamp(38px,4vw,54px);line-height:1;color:var(--gold)}

/* ---------------------------------------------------------------- buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:15px 30px;border:1px solid var(--ink);background:var(--ink);color:var(--paper);
  font-size:12.5px;font-weight:600;letter-spacing:.13em;text-transform:uppercase;
  border-radius:var(--r);cursor:pointer;transition:.28s ease;white-space:nowrap;
}
.btn:hover{background:var(--gold);border-color:var(--gold);color:#fff;transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--ink)}
.btn-ghost:hover{background:var(--ink);border-color:var(--ink);color:var(--paper);transform:translateY(-1px)}
.btn-gold{background:var(--gold);border-color:var(--gold);color:#fff}
.btn-gold:hover{background:var(--ink);border-color:var(--ink)}
.btn-light{background:transparent;border-color:rgba(255,255,255,.34);color:var(--paper)}
.btn-light:hover{background:var(--paper);color:var(--ink);border-color:var(--paper)}
.btn-sm{padding:11px 20px;font-size:11.5px}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.link-u{
  border-bottom:1px solid var(--gold);padding-bottom:3px;font-size:13px;font-weight:600;
  letter-spacing:.1em;text-transform:uppercase;color:var(--ink);transition:.24s;
}
.link-u:hover{color:var(--gold)}

/* ---------------------------------------------------------------- topbar / nav */
.topbar{
  background:var(--ink);color:rgba(250,248,244,.82);
  font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;
}
.topbar .wrap{display:flex;justify-content:space-between;gap:24px;align-items:center;min-height:40px}
.topbar b{color:var(--gold-light);font-weight:600}
.topbar-r{display:flex;gap:22px;align-items:center}
.topbar a:hover{color:var(--gold-light)}

.site-head{
  position:sticky;top:0;z-index:80;background:rgba(250,248,244,.94);
  backdrop-filter:saturate(150%) blur(14px);border-bottom:1px solid var(--line);
}
.site-head .wrap{display:flex;align-items:center;justify-content:space-between;gap:28px;min-height:74px}
.brand{display:flex;align-items:center;gap:12px;flex:none}
.brand-mark{
  width:40px;height:34px;border:1px solid var(--gold);display:grid;place-items:center;
  font-family:var(--f-display);font-size:15px;letter-spacing:.06em;color:var(--gold);flex:none;
}
.brand-txt{font-family:var(--f-display);font-size:25px;letter-spacing:.12em;text-transform:uppercase}
.brand-sub{
  display:block;font-family:var(--f-text);font-size:8.5px;letter-spacing:.32em;
  text-transform:uppercase;color:var(--muted-2);margin-top:1px;
}
.nav{display:flex;align-items:center;gap:clamp(14px,2vw,30px)}
.nav a{
  font-size:12.5px;font-weight:500;letter-spacing:.11em;text-transform:uppercase;
  color:var(--ink-soft);padding:6px 0;border-bottom:1px solid transparent;transition:.24s;
}
.nav a:hover{color:var(--gold);border-bottom-color:var(--gold)}
.nav a[aria-current="page"]{border-bottom-color:var(--gold);color:var(--gold)}
.head-cta{display:flex;align-items:center;gap:14px;flex:none}
.burger{
  display:none;background:none;border:1px solid var(--line);width:44px;height:40px;
  align-items:center;justify-content:center;cursor:pointer;gap:4px;flex-direction:column;
}
.burger span{display:block;width:18px;height:1.5px;background:var(--ink)}

/* ---------------------------------------------------------------- hero */
.hero{position:relative;background:var(--ink);color:var(--paper);overflow:hidden}
.hero-img{position:absolute;inset:0}
.hero-img img{width:100%;height:100%;object-fit:cover;opacity:.5}
.hero-img::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(20,18,15,.94) 0%,rgba(20,18,15,.82) 38%,rgba(20,18,15,.32) 100%);
}
.hero .wrap{position:relative;z-index:2;padding-top:clamp(72px,10vw,148px);padding-bottom:clamp(56px,7vw,104px)}
.hero-inner{max-width:800px}
.hero h1{color:var(--paper)}
.hero .lede{color:rgba(250,248,244,.8);max-width:620px}
.hero-certs{display:flex;flex-wrap:wrap;gap:10px;margin:30px 0 0}
.chip{
  border:1px solid rgba(255,255,255,.2);padding:7px 14px;font-size:10.5px;letter-spacing:.16em;
  text-transform:uppercase;color:rgba(250,248,244,.72);border-radius:100px;
}
.chip-gold{border-color:rgba(201,169,113,.5);color:var(--gold-light)}

.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line-dark);margin-top:56px}
.sec-dark .stats,.hero .stats{background:rgba(255,255,255,.13)}
.stat{background:var(--ink);padding:26px 24px}
.stat dt{font-size:10.5px;letter-spacing:.18em;text-transform:uppercase;color:rgba(250,248,244,.55);margin-bottom:8px}
.stat dd{margin:0;font-family:var(--f-display);font-size:clamp(26px,2.6vw,36px);color:var(--gold-light);line-height:1}
.stat dd small{font-family:var(--f-text);font-size:11.5px;color:rgba(250,248,244,.55);display:block;margin-top:7px;letter-spacing:.06em}

/* 浅底数据条（品类页 / 报价页 / 关于页 page-head）。
   .stat 默认按「深色卡片」配色（dt 与 small 是近白色），一旦放在白底上就变成白底白字。
   这里覆盖为浅底可读配色。 */
.stats-light{background:var(--line)}
.stats-light .stat{background:#fff}
.stats-light .stat dt{color:var(--muted)}
.stats-light .stat dd{color:var(--gold)}
.stats-light .stat dd small{color:var(--muted)}

/* ---------------------------------------------------------------- cards */
.card{background:#fff;border:1px solid var(--line-soft);transition:.34s ease;display:flex;flex-direction:column}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--line)}
.card-media{position:relative;overflow:hidden;background:var(--paper-3);aspect-ratio:4/3}
.card-media img{width:100%;height:100%;object-fit:cover;transition:transform .7s cubic-bezier(.2,.7,.2,1)}
.card:hover .card-media img{transform:scale(1.045)}
.card-tag{
  position:absolute;top:14px;left:14px;background:rgba(20,18,15,.86);color:var(--gold-light);
  font-size:10px;letter-spacing:.16em;text-transform:uppercase;padding:7px 12px;border-radius:100px;
}
.card-body{padding:26px 26px 30px;display:flex;flex-direction:column;gap:12px;flex:1}
.card-body h3{font-size:clamp(22px,2.1vw,27px)}
.card-body p{font-size:14.5px;color:var(--muted);line-height:1.66;flex:1}
.spec{list-style:none;margin:2px 0 0;padding:0;border-top:1px solid var(--line-soft);padding-top:14px}
.spec li{display:flex;justify-content:space-between;gap:16px;font-size:12.5px;padding:5px 0;color:var(--muted)}
.spec li b{color:var(--ink);font-weight:600;letter-spacing:.02em}
.card-cta{display:flex;gap:12px;align-items:center;margin-top:6px}

.card-flat{background:transparent;border:0}
.card-flat .card-body{padding:22px 0 0}
.card-flat:hover{transform:none;box-shadow:none}

/* ---------------------------------------------------------------- process */
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(20px,3vw,40px)}
.step{border-top:1px solid var(--line);padding-top:24px;counter-increment:s;position:relative}
.sec-dark .step{border-top-color:var(--line-dark)}
.step::before{
  content:"0" counter(s);font-family:var(--f-display);font-size:15px;color:var(--gold);
  letter-spacing:.14em;display:block;margin-bottom:14px;
}
.step h4{margin-bottom:10px}
.step p{font-size:14.5px;color:var(--muted);line-height:1.64}
.sec-dark .step p{color:rgba(250,248,244,.66)}
.step ul{list-style:none;padding:0;margin:14px 0 0;font-size:13px;color:var(--muted)}
.sec-dark .step ul{color:rgba(250,248,244,.66)}
.step ul li{padding-left:16px;position:relative;line-height:1.6;margin-bottom:5px}
.step ul li::before{content:"";position:absolute;left:0;top:9px;width:5px;height:1px;background:var(--gold)}

/* ---------------------------------------------------------------- finishes */
.finish{display:grid;gap:20px}
.finish-media{aspect-ratio:1/1;overflow:hidden;background:var(--paper-3)}
.finish-media img{width:100%;height:100%;object-fit:cover}
.finish h4{margin-bottom:8px}
.finish p{font-size:14px;color:var(--muted);line-height:1.64}
.finish .best{display:block;font-size:11px;letter-spacing:.12em;text-transform:uppercase;color:var(--gold);margin-bottom:10px}

/* ---------------------------------------------------------------- compare table */
.tbl-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--line)}
table.tbl{width:100%;border-collapse:collapse;min-width:640px;background:#fff;font-size:14px}
table.tbl th,table.tbl td{padding:15px 18px;text-align:left;border-bottom:1px solid var(--line-soft);vertical-align:top}
table.tbl thead th{
  background:var(--paper-2);font-family:var(--f-text);font-size:11px;font-weight:600;
  letter-spacing:.15em;text-transform:uppercase;color:var(--ink);
}
table.tbl tbody tr:last-child td{border-bottom:0}
table.tbl td b{font-weight:600}
table.tbl .yes{color:var(--ok);font-weight:600}
table.tbl .no{color:var(--muted-2)}
table.tbl caption{
  caption-side:bottom;text-align:left;padding:14px 18px;font-size:12px;color:var(--muted-2);
  border-top:1px solid var(--line-soft);
}

/* compare two-column */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line)}
.compare>div{background:#fff;padding:clamp(24px,3vw,40px)}
.compare .col-bad{background:var(--paper-2)}
.compare h4{margin-bottom:18px}
.compare ul{list-style:none;padding:0;margin:0}
.compare li{display:flex;gap:12px;font-size:14.5px;padding:9px 0;border-bottom:1px solid var(--line-soft);color:var(--muted)}
.compare li:last-child{border-bottom:0}
.compare li b{color:var(--ink);font-weight:600}
.mk{flex:none;width:18px;text-align:center;font-weight:700}
.mk-x{color:var(--muted-2)}
.mk-v{color:var(--ok)}

/* ---------------------------------------------------------------- quotes */
.quote{border-left:1px solid var(--gold);padding-left:26px}
.quote p{font-family:var(--f-display);font-size:clamp(19px,2vw,25px);line-height:1.44;font-style:italic;color:var(--ink)}
.sec-dark .quote p{color:var(--paper)}
.quote footer{margin-top:18px;font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted)}
.sec-dark .quote footer{color:rgba(250,248,244,.55)}
.stars{color:var(--gold);letter-spacing:.2em;font-size:13px;margin-bottom:14px}

/* ---------------------------------------------------------------- faq */
.faq{border-top:1px solid var(--line)}
.faq details{border-bottom:1px solid var(--line);padding:6px 0}
.faq summary{
  cursor:pointer;list-style:none;padding:20px 44px 20px 0;position:relative;
  font-family:var(--f-display);font-size:clamp(19px,1.9vw,24px);line-height:1.3;
}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{
  content:"+";position:absolute;right:6px;top:50%;transform:translateY(-50%);
  font-family:var(--f-text);font-size:22px;font-weight:300;color:var(--gold);transition:.28s;
}
.faq details[open] summary::after{content:"–"}
.faq .ans{padding:0 60px 26px 0;color:var(--muted);font-size:15px;line-height:1.72}
.faq .ans p{margin-bottom:.9em}

/* ---------------------------------------------------------------- forms */
.form-card{background:#fff;border:1px solid var(--line);padding:clamp(26px,3.4vw,44px)}
.field{margin-bottom:18px}
.field label{display:block;font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted);margin-bottom:8px}
.field input,.field select,.field textarea{
  width:100%;padding:13px 15px;border:1px solid var(--line);background:var(--paper);
  font-family:var(--f-text);font-size:14.5px;color:var(--ink);border-radius:var(--r);transition:.2s;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--gold);background:#fff;box-shadow:0 0 0 3px rgba(169,133,74,.1);
}
.field textarea{min-height:118px;resize:vertical}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.consent{display:flex;gap:10px;align-items:flex-start;font-size:12.5px;color:var(--muted);line-height:1.5}
.consent input{width:auto;margin-top:3px}
.form-note{font-size:12px;color:var(--muted-2);margin-top:14px;line-height:1.6}
.form-alert{display:none;padding:13px 16px;font-size:13.5px;margin-bottom:18px;border-radius:var(--r);line-height:1.6}
.form-alert.err{display:block;background:#FBF1E8;border:1px solid #E7C9AC;color:#7E4A18}
.form-alert.ok{display:block;background:#EDF4EF;border:1px solid #C3DAC9;color:#2F5540}
.hp{position:absolute!important;left:-9999px!important;height:0;overflow:hidden}

/* ---------------------------------------------------------------- quote rail */
.rail{margin-top:30px;border-top:1px solid var(--line);padding-top:24px;display:grid;gap:10px}
.rail a{display:flex;align-items:center;gap:12px;font-size:14px;color:var(--ink-soft);transition:.24s}
.rail a:hover{color:var(--gold)}
.rail .ic{width:30px;height:30px;border:1px solid var(--line);display:grid;place-items:center;flex:none;font-size:13px;color:var(--gold)}

/* ---------------------------------------------------------------- sidebar panels */
.panel{border:1px solid var(--line);padding:clamp(22px,2.6vw,32px);background:#fff}
.panel-dark{background:var(--ink);color:var(--paper);border-color:var(--ink)}
.panel-dark h4,.panel-dark .num{color:var(--gold-light)}
.panel-list{list-style:none;padding:0;margin:0}
.panel-list li{padding:11px 0;border-bottom:1px solid var(--line-soft);font-size:14px;display:flex;gap:12px;color:var(--muted)}
.panel-dark .panel-list li{border-bottom-color:var(--line-dark);color:rgba(250,248,244,.72)}
.panel-list li:last-child{border-bottom:0}
.panel-list b{color:var(--ink);font-weight:600}
.panel-dark .panel-list b{color:var(--paper)}

/* ---------------------------------------------------------------- article */
.article{max-width:780px}
.article h2{font-size:clamp(28px,3.2vw,42px);margin:56px 0 18px}
.article h3{margin:38px 0 14px}
.article p{font-size:16.5px;line-height:1.78}
.article ul,.article ol{padding-left:22px;margin:0 0 1.2em}
.article li{margin-bottom:9px;font-size:16px;line-height:1.7}
.article img{margin:34px 0;border:1px solid var(--line-soft)}
.article .callout{
  border-left:2px solid var(--gold);background:var(--paper-2);padding:22px 26px;margin:30px 0;
}
.article .callout p{font-size:15.5px;margin:0}
.article .callout strong{color:var(--ink)}
.meta{
  display:flex;flex-wrap:wrap;gap:16px;font-size:11.5px;letter-spacing:.13em;text-transform:uppercase;
  color:var(--muted-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line);
  padding:13px 0;margin-bottom:40px;
}
.toc{border:1px solid var(--line);padding:22px 26px;margin:0 0 44px;background:var(--paper-2)}
.toc p{margin:0 0 12px;font-size:11px;letter-spacing:.18em;text-transform:uppercase;color:var(--gold)}
.toc ol{margin:0;padding-left:20px;font-size:14px}
.toc li{margin-bottom:6px}
.toc a{border-bottom:1px solid transparent}
.toc a:hover{border-bottom-color:var(--gold)}

/* ---------------------------------------------------------------- cta band */
.cta-band{background:var(--ink);color:var(--paper);position:relative;overflow:hidden}
.cta-band .wrap{position:relative;z-index:2}
.cta-band h2 em{color:var(--gold-light)}

/* --- 深色收尾区（.cta-band）与深色区块（.sec-dark）内的可读性修正 ---
   1) .cta-band 设了 color:var(--paper)，会继承进白底的 .form-card，
      导致卡片里的标题变成「白底白字」（实测对比度 1.06:1）。这里把卡片内部前景色改回深色。
   2) .lede 默认是深灰(--ink-soft)，落在深底上只有 1.26:1，几乎不可见。
   3) .btn-ghost 默认深字 + 透明底，落在深底上是 1:1，按钮文字完全消失。 */
.cta-band .form-card,.sec-dark .form-card{color:var(--ink)}
.cta-band .lede,.sec-dark .lede{color:rgba(250,248,244,.78)}
.cta-band .btn-ghost,.sec-dark .btn-ghost{color:var(--paper);border-color:rgba(250,248,244,.35)}
.cta-band .btn-ghost:hover,.sec-dark .btn-ghost:hover{
  background:var(--paper);color:var(--ink);border-color:var(--paper);
}
.cta-band .panel-list,.sec-dark .panel-list{color:rgba(250,248,244,.82)}

/* 404 页把 .panel 当整块链接用：补齐可点击态的样式 */
a.panel{display:block;text-decoration:none;color:inherit;transition:border-color .24s ease,transform .24s ease}
a.panel:hover{border-color:var(--gold);transform:translateY(-2px)}
a.panel h4{color:var(--ink)}
a.panel:hover h4{color:var(--gold)}
.cta-cols{display:grid;grid-template-columns:1fr .9fr;gap:clamp(32px,5vw,80px);align-items:start}

/* ---------------------------------------------------------------- footer */
.site-foot{background:var(--ink);color:rgba(250,248,244,.7);padding:clamp(56px,7vw,96px) 0 0;font-size:14px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:clamp(28px,4vw,56px)}
.site-foot h5{
  font-family:var(--f-text);font-size:11px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;
  color:var(--gold-light);margin:0 0 20px;
}
.site-foot ul{list-style:none;padding:0;margin:0}
.site-foot li{margin-bottom:11px}
.site-foot a{transition:.22s}
.site-foot a:hover{color:var(--gold-light)}
.foot-brand .brand-txt{color:var(--paper)}
.foot-brand p{font-size:13.5px;line-height:1.72;color:rgba(250,248,244,.6);max-width:330px;margin-top:20px}
.foot-legal{
  border-top:1px solid var(--line-dark);margin-top:56px;padding:24px 0 30px;
  display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;font-size:12px;color:rgba(250,248,244,.45);
}
.foot-legal a:hover{color:var(--gold-light)}

/* ---------------------------------------------------------------- sticky mobile bar */
.sticky-bar{
  display:none;position:fixed;bottom:0;left:0;right:0;z-index:90;
  background:rgba(20,18,15,.97);backdrop-filter:blur(10px);
  border-top:1px solid rgba(255,255,255,.14);padding:10px 12px;
  grid-template-columns:1fr 1fr;gap:10px;
}
.sticky-bar a{
  display:flex;align-items:center;justify-content:center;gap:8px;padding:13px 10px;
  font-size:12px;font-weight:600;letter-spacing:.1em;text-transform:uppercase;border-radius:var(--r);
}
.sticky-bar .sb-wa{background:#1F7A4D;color:#fff}
.sticky-bar .sb-q{background:var(--gold);color:#fff}

/* ---------------------------------------------------------------- WhatsApp 悬浮窗 */
.wa-float{position:fixed;right:22px;bottom:22px;z-index:95}
.wa-fab{
  position:relative;width:56px;height:56px;border-radius:50%;border:0;cursor:pointer;
  background:#1F7A4D;color:#fff;display:grid;place-items:center;
  box-shadow:0 10px 28px -8px rgba(20,18,15,.5);transition:transform .24s ease,background .24s ease;
}
.wa-fab:hover{transform:scale(1.06);background:#186B41}
.wa-fab::after{
  content:"";position:absolute;inset:0;border-radius:50%;
  border:1px solid rgba(31,122,77,.6);animation:waPulse 2.6s ease-out infinite;pointer-events:none;
}
@keyframes waPulse{0%{transform:scale(1);opacity:.85}70%{transform:scale(1.55);opacity:0}100%{opacity:0}}
@media (prefers-reduced-motion:reduce){.wa-fab::after{animation:none}}

.wa-panel{
  position:absolute;right:0;bottom:72px;width:320px;background:#fff;border:1px solid var(--line);
  box-shadow:var(--shadow);padding:20px 20px 16px;opacity:0;visibility:hidden;transform:translateY(8px);
  transition:opacity .22s ease,transform .22s ease,visibility .22s;
}
.wa-panel.open{opacity:1;visibility:visible;transform:translateY(0)}
.wa-head{display:flex;align-items:center;gap:11px;padding-bottom:14px;border-bottom:1px solid var(--line-soft)}
.wa-avatar{
  width:34px;height:34px;border-radius:50%;background:var(--ink);color:var(--gold-light);
  display:grid;place-items:center;font-family:var(--f-display);font-size:13px;flex:none;
}
.wa-who{display:block;flex:1;min-width:0}
.wa-who b{display:block;font-size:13.5px;font-weight:600}
.wa-who i{display:block;font-size:11px;color:var(--muted);font-style:normal;margin-top:2px}
.wa-close{background:none;border:0;font-size:22px;line-height:1;color:var(--muted-2);cursor:pointer;padding:0 2px}
.wa-close:hover{color:var(--ink)}
.wa-msg{font-size:13.5px;line-height:1.62;color:var(--muted);margin:16px 0}
.wa-go{
  display:flex;align-items:center;justify-content:center;gap:9px;width:100%;
  background:#1F7A4D;color:#fff;padding:14px 16px;font-size:12.5px;font-weight:600;
  letter-spacing:.1em;text-transform:uppercase;transition:.24s;
}
.wa-go:hover{background:#186B41}
.wa-alts{display:grid;gap:9px;margin-top:14px;padding-top:14px;border-top:1px solid var(--line-soft)}
.wa-alts a{font-size:13px;color:var(--ink-soft);border-bottom:1px solid transparent;transition:.2s;width:fit-content}
.wa-alts a:hover{color:var(--gold);border-bottom-color:var(--gold)}
.wa-foot{margin:14px 0 0;font-size:11.5px;line-height:1.6;color:var(--muted-2)}

@media (max-width:820px){
  /* 手机上让开底部粘性条，避免两个 CTA 叠在一起 */
  .wa-float{right:14px;bottom:86px}
  .wa-panel{width:min(320px,calc(100vw - 28px))}
}
@media print{.wa-float{display:none}}

/* ---------------------------------------------------------------- breadcrumb */
.crumb{font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--muted-2);padding:22px 0 0}
.crumb a:hover{color:var(--gold)}
.crumb span{margin:0 9px;opacity:.5}

/* ---------------------------------------------------------------- page head */
.page-head{padding:clamp(44px,6vw,84px) 0 clamp(28px,4vw,52px)}
.page-head h1{max-width:16ch}
.page-head .lede{max-width:660px;margin-top:22px}

/* ---------------------------------------------------------------- notices */
.notice{
  border:1px dashed var(--gold);background:rgba(169,133,74,.06);padding:18px 22px;font-size:13.5px;
  line-height:1.66;color:var(--ink-soft);margin:24px 0;
}
.notice b{color:var(--gold);letter-spacing:.08em;text-transform:uppercase;font-size:11px}

/* ---------------------------------------------------------------- responsive */
@media (max-width:1080px){
  .nav{display:none}
  .burger{display:flex}
  .head-cta .btn{display:none}
  .g4{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .foot-grid{grid-template-columns:1fr 1fr}
  .cta-cols{grid-template-columns:1fr}
  .split,.split-wide,.split-wide-r{grid-template-columns:1fr;gap:36px}
}
@media (max-width:820px){
  .g3{grid-template-columns:1fr}
  .g2{grid-template-columns:1fr}
  .stats{grid-template-columns:1fr 1fr}
  .compare{grid-template-columns:1fr}
  .field-row{grid-template-columns:1fr}
  .sticky-bar{display:grid}
  body{padding-bottom:74px}
  .topbar-r{display:none}
  .topbar .wrap{justify-content:center}
}
@media (max-width:560px){
  .g4{grid-template-columns:1fr}
  .steps{grid-template-columns:1fr;gap:0}
  .step{padding:22px 0}
  .foot-grid{grid-template-columns:1fr;gap:36px}
  .stat{padding:20px 18px}
}

@media print{
  .site-head,.sticky-bar,.topbar,.cta-band{display:none}
}

/* ---------------------------------------------------------------- mobile nav drawer */
.mnav{
  position:fixed;inset:0;z-index:100;background:var(--ink);color:var(--paper);
  padding:22px var(--pad) 40px;overflow-y:auto;display:none;
}
.mnav.open{display:block}
.mnav-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:36px}
.mnav-close{background:none;border:1px solid var(--line-dark);color:var(--paper);width:44px;height:40px;cursor:pointer;font-size:20px}
.mnav a{
  display:block;padding:17px 0;border-bottom:1px solid var(--line-dark);
  font-family:var(--f-display);font-size:27px;
}
.mnav .mnav-cta{margin-top:32px;display:grid;gap:12px}
.mnav .mnav-cta .btn{width:100%}