/* ==========================================================================
   POSTAL ASSET PARTNERS — INSTITUTIONAL COLLECTION THEME
   v2026.08.29 · 机构级典藏 / 博物馆级视觉体系
   Design tokens: 墨黑博物墙 × 黄铜金 × 羊皮纸 · Playfair Display × Inter × Mono
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:ital,wght@0,400;0,500;0,600;0,700;1,400&family=Inter:wght@300;400;500;600;700&family=Roboto+Mono:wght@400;500&display=swap');

/* --------------------------------------------------------------------------
   1. DESIGN TOKENS
   -------------------------------------------------------------------------- */
:root{
  /* 画布：博物馆墙面近黑，带极淡蓝调 */
  --navy:#0A0E18;
  --navy-light:#141C2E;
  --ink:#0A0E18;
  --ink-2:#10172A;
  --ink-3:#1A2338;

  /* 金属：黄铜 */
  --gold:#C9A227;
  --gold-light:#E8D9A8;
  --gold-deep:#8F7016;
  --brass-grad:linear-gradient(135deg,#F0E2B6 0%,#C9A227 48%,#96761C 100%);

  /* 纸：羊皮纸 */
  --cream:#F5F2EA;
  --cream-2:#EFEAE0;
  --parchment:#FBF9F4;

  /* 文字 */
  --text-dark:#14181F;
  --text-muted:#6B6A64;
  --text-on-dark:#EDEAE3;
  --text-on-dark-muted:#9BA0AC;

  /* 线 */
  --border:#DDD6C6;
  --hairline:rgba(201,162,39,.24);
  --hairline-soft:rgba(201,162,39,.12);

  /* 字族 */
  --font-display:'Playfair Display',Georgia,'Times New Roman',serif;
  --font-body:'Inter','Helvetica Neue',Arial,sans-serif;
  --font-mono:'Roboto Mono',ui-monospace,Menlo,Consolas,monospace;

  /* 节奏 */
  --shell:1180px;
  --shell-wide:1280px;
  --sec-pad:104px;
  --radius:3px;
  --radius-lg:6px;

  /* 阴影：低扩散、深落影（博物馆射灯感） */
  --shadow-sm:0 2px 10px rgba(10,14,24,.07);
  --shadow-md:0 14px 38px rgba(10,14,24,.11);
  --shadow-lg:0 26px 70px rgba(10,14,24,.16);
  --shadow-gold:0 10px 30px rgba(201,162,39,.22);
}

/* --------------------------------------------------------------------------
   2. 全局基础
   -------------------------------------------------------------------------- */
*{box-sizing:border-box}

html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}

body{
  font-family:var(--font-body);
  font-size:16.5px;
  font-weight:400;
  line-height:1.72;
  color:var(--text-dark);
  background:var(--cream);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  /* 羊皮纸细微纹理 */
  background-image:
    radial-gradient(1100px 520px at 88% -8%, rgba(201,162,39,.055), transparent 62%),
    radial-gradient(900px 480px at 4% 4%, rgba(11,31,58,.035), transparent 58%);
  background-attachment:fixed;
}

/* 标题：机构衬线 */
h1,h2,h3,h4,h5{
  font-family:var(--font-display);
  font-weight:600;
  letter-spacing:-.012em;
  line-height:1.18;
  color:var(--text-dark);
  margin:0 0 .5em;
}
h1{font-size:clamp(2.3rem,4.6vw,3.55rem);line-height:1.1;letter-spacing:-.02em}
h2{font-size:clamp(1.65rem,2.9vw,2.3rem)}
h3{font-size:clamp(1.15rem,1.7vw,1.35rem)}
h4{font-size:1.05rem}

p{margin:0 0 1.15em}
a{color:inherit}
img{max-width:100%;display:block}

strong{font-weight:600;color:var(--gold-deep)}

::selection{background:rgba(201,162,39,.26);color:var(--text-dark)}

/* 小的等宽标签（档案编目感） */
.sans,.eyebrow,.mono{
  font-family:var(--font-mono);
}
.eyebrow{
  font-size:11.5px;
  font-weight:500;
  letter-spacing:.19em;
  text-transform:uppercase;
  color:var(--gold-deep);
  margin-bottom:16px;
  display:flex;
  align-items:center;
  gap:10px;
}
.eyebrow::before{
  content:'';width:26px;height:1px;background:var(--gold);flex:none;opacity:.75;
}
.section-head .eyebrow{justify-content:center}
.section-head .eyebrow::after{
  content:'';width:26px;height:1px;background:var(--gold);flex:none;opacity:.75;
}

/* --------------------------------------------------------------------------
   3. 页头 / 导航 — 博物馆铭牌
   -------------------------------------------------------------------------- */
.logo-home{
  display:inline-flex;align-items:center;text-decoration:none!important;
  color:inherit;transition:opacity .2s ease;
}
.logo-home:hover{opacity:.82}

header{
  background:rgba(10,14,24,.94)!important;
  backdrop-filter:saturate(150%) blur(14px);
  -webkit-backdrop-filter:saturate(150%) blur(14px);
  padding:16px 5%!important;
  border-bottom:1px solid var(--hairline);
  box-shadow:0 6px 34px rgba(10,14,24,.4)!important;
}

.logo{
  font-family:var(--font-display)!important;
  font-size:19px!important;
  font-weight:600;
  letter-spacing:.005em;
  display:flex;align-items:center;gap:11px;
}
.logo .mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;flex:none;
  border:1px solid var(--gold);
  border-radius:2px;
  color:var(--gold-light);
  font-family:var(--font-display);
  font-size:14px;
  letter-spacing:.04em;
  background:linear-gradient(150deg,rgba(201,162,39,.16),rgba(201,162,39,.04));
}

header nav{
  display:flex;
  align-items:center;
  gap:5px;
}

header nav a{
  font-family:var(--font-body);
  font-size:12.6px;
  font-weight:500;
  letter-spacing:.03em;
  color:rgba(237,234,227,.8)!important;
  position:relative;
  padding:6px 8px;
  transition:color .22s ease;
  white-space:nowrap;
}
header nav a::after{
  content:'';position:absolute;left:0;bottom:0;
  width:0;height:1.5px;background:var(--brass-grad);
  transition:width .3s cubic-bezier(.4,0,.2,1);
}
header nav a:hover{color:var(--gold-light)!important}
header nav a:hover::after{width:100%}

/* Stamp Shop：导航中的突出项 */
header nav a[href$="shop.html"],
header nav a[href="/shop.html"]{
  color:var(--gold-light)!important;
  font-weight:600;
  padding:6px 12px;
  border:1px solid var(--hairline);
  border-radius:2px;
  background:linear-gradient(150deg,rgba(201,162,39,.14),rgba(201,162,39,.03));
}
header nav a[href$="shop.html"]:hover,
header nav a[href="/shop.html"]:hover{
  background:linear-gradient(150deg,rgba(201,162,39,.26),rgba(201,162,39,.08));
  border-color:var(--gold);
}
header nav a[href$="shop.html"]::after,
header nav a[href="/shop.html"]::after{display:none}

header nav a.nav-cta{
  background:var(--brass-grad);
  color:#0A0E18!important;
  font-weight:600;
  padding:8px 16px;
  border-radius:2px;
  box-shadow:var(--shadow-gold);
  margin-left:4px;
}
header nav a.nav-cta::after{display:none}
header nav a.nav-cta:hover{
  color:#0A0E18!important;
  transform:translateY(-1px);
  box-shadow:0 14px 34px rgba(201,162,39,.34);
}

/* --------------------------------------------------------------------------
   4. HERO — 博物馆级主厅
   -------------------------------------------------------------------------- */
.hero{
  position:relative;
  overflow:hidden;
  background:
    radial-gradient(1000px 540px at 80% 12%, rgba(201,162,39,.17), transparent 60%),
    radial-gradient(820px 500px at 6% 88%, rgba(20,28,46,.55), transparent 60%),
    linear-gradient(168deg,#0E1626 0%, var(--navy) 58%, #070B12 100%)!important;
  color:var(--text-on-dark);
  padding:clamp(72px,9vw,132px) 5% clamp(64px,8vw,116px);
}
/* 展柜网格纹理 */
.hero::before{
  content:'';position:absolute;inset:0;pointer-events:none;
  background-image:
    linear-gradient(rgba(201,162,39,.045) 1px,transparent 1px),
    linear-gradient(90deg,rgba(201,162,39,.045) 1px,transparent 1px);
  background-size:64px 64px;
  -webkit-mask-image:radial-gradient(ellipse 78% 68% at 50% 42%,#000 28%,transparent 76%);
  mask-image:radial-gradient(ellipse 78% 68% at 50% 42%,#000 28%,transparent 76%);
}
/* 顶部射灯光带 */
.hero::after{
  content:'';position:absolute;top:0;left:50%;transform:translateX(-50%);
  width:min(760px,80%);height:1px;pointer-events:none;
  background:linear-gradient(90deg,transparent,rgba(201,162,39,.6),transparent);
}
.hero-inner{position:relative;z-index:2}

.hero h1,.hero .sub,.hero .eyebrow,.hero .hero-ctas{position:relative;z-index:2}
.hero h1{
  color:#FBF9F4;
  font-size:clamp(2.35rem,5.1vw,4rem);
  font-weight:600;
  line-height:1.09;
  letter-spacing:-.022em;
  max-width:19ch;
  margin:22px 0 24px;
}
.hero h1 strong{
  font-weight:600;
  background:var(--brass-grad);
  -webkit-background-clip:text;background-clip:text;
  color:transparent;
}
.hero .eyebrow{color:var(--gold-light)}
.hero .eyebrow::before{background:var(--gold-light)}
.hero .sub{
  font-size:clamp(16px,1.35vw,18.5px);
  line-height:1.78;
  color:rgba(237,234,227,.84);
  max-width:60ch;
  font-weight:300;
}

/* HERO 入场动画 */
@keyframes icRise{from{opacity:0;transform:translateY(28px)}to{opacity:1;transform:none}}
@media (prefers-reduced-motion:no-preference){
  .hero .eyebrow{animation:icRise .75s .05s cubic-bezier(.22,1,.36,1) both}
  .hero h1{animation:icRise .75s .14s cubic-bezier(.22,1,.36,1) both}
  .hero .sub{animation:icRise .75s .24s cubic-bezier(.22,1,.36,1) both}
  .hero .hero-ctas{animation:icRise .75s .34s cubic-bezier(.22,1,.36,1) both}
  .hero-stats{animation:icRise .75s .44s cubic-bezier(.22,1,.36,1) both}
}

/* HERO 数据卡：黄铜铭牌 */
.hero-stats{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(148px,1fr));
  gap:1px;
  background:var(--hairline-soft);
  border:1px solid var(--hairline);
  border-radius:var(--radius);
  overflow:hidden;
  box-shadow:0 20px 60px rgba(0,0,0,.42);
}
.hero-stats .stat{
  background:linear-gradient(165deg,rgba(26,35,56,.92),rgba(10,14,24,.92));
  padding:22px 20px;
  transition:background .3s ease;
}
.hero-stats .stat:hover{background:linear-gradient(165deg,rgba(34,45,70,.96),rgba(16,23,42,.96))}
.hero-stats .num{
  font-family:var(--font-display);
  font-size:1.72rem;
  font-weight:600;
  color:var(--gold-light);
  line-height:1.15;
  letter-spacing:-.01em;
}
.hero-stats .label{
  font-family:var(--font-mono);
  font-size:10.5px;
  letter-spacing:.11em;
  text-transform:uppercase;
  color:rgba(237,234,227,.58);
  margin-top:7px;
  line-height:1.5;
}

/* --------------------------------------------------------------------------
   5. 按钮
   -------------------------------------------------------------------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font-family:var(--font-body);
  font-size:14.5px;
  font-weight:600;
  letter-spacing:.03em;
  padding:14px 28px;
  border-radius:2px;
  border:1px solid transparent;
  cursor:pointer;
  text-decoration:none;
  position:relative;
  overflow:hidden;
  transition:transform .22s cubic-bezier(.22,1,.36,1),box-shadow .22s ease,border-color .22s ease,background .22s ease,color .22s ease;
}
.btn-primary{
  background:var(--brass-grad)!important;
  color:#0A0E18!important;
  box-shadow:var(--shadow-gold);
}
.btn-primary::after{
  content:'';position:absolute;top:0;left:-90%;width:45%;height:100%;
  background:linear-gradient(105deg,transparent,rgba(255,255,255,.42),transparent);
  transform:skewX(-20deg);
  transition:left .55s ease;
}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 40px rgba(201,162,39,.36);color:#0A0E18!important}
.btn-primary:hover::after{left:135%}

.btn-outline{
  background:transparent!important;
  color:rgba(237,234,227,.92)!important;
  border-color:rgba(237,234,227,.34);
}
.btn-outline:hover{
  border-color:var(--gold);
  color:var(--gold-light)!important;
  background:rgba(201,162,39,.09);
  transform:translateY(-2px);
}
/* 浅底页面上的描边按钮 */
section:not(.hero) .btn-outline,
.prose .btn-outline{
  background:transparent!important;
  color:var(--text-dark)!important;
  border-color:var(--border);
}
section:not(.hero) .btn-outline:hover,
.prose .btn-outline:hover{
  color:var(--gold-deep)!important;
  border-color:var(--gold);
  background:rgba(201,162,39,.07);
}

/* --------------------------------------------------------------------------
   6. 区块节奏
   -------------------------------------------------------------------------- */
section{
  padding:var(--sec-pad) 5%;
  position:relative;
}
.section-inner{max-width:var(--shell);margin:0 auto}
.section-head{max-width:660px;margin:0 auto 56px;text-align:center}
.section-head h2{
  font-size:clamp(1.7rem,3.1vw,2.45rem);
  position:relative;
  padding-bottom:20px;
  margin-bottom:16px;
}
.section-head h2::after{
  content:'';position:absolute;left:50%;transform:translateX(-50%);
  bottom:0;width:60px;height:2px;border-radius:2px;
  background:var(--brass-grad);
}
.section-head p.lede{
  font-size:17px;color:var(--text-muted);font-weight:300;line-height:1.75;
}

/* 深色区块（交替节奏） */
section.dark,
.dark{
  background:linear-gradient(170deg,var(--ink-2) 0%,var(--ink) 100%);
  color:var(--text-on-dark);
}
section.dark h2,section.dark h3,.dark h2,.dark h3{color:#FBF9F4}
section.dark p,.dark p{color:rgba(237,234,227,.8)}
section.dark .section-head h2::after,.dark .section-head h2::after{background:var(--brass-grad)}

/* --------------------------------------------------------------------------
   7. 卡片 — 展柜托盘
   -------------------------------------------------------------------------- */
.card,.buyer-card,.faq-item,.calc-box{
  background:var(--parchment);
  border:1px solid var(--border);
  border-radius:var(--radius);
  transition:transform .28s cubic-bezier(.22,1,.36,1),box-shadow .28s ease,border-color .28s ease;
}
.card:hover,.buyer-card:hover{
  transform:translateY(-4px);
  border-color:var(--gold);
  box-shadow:var(--shadow-lg);
}
/* 顶部一道金线（藏品标签感） */
.card::before,.buyer-card::before{
  content:'';display:block;height:2px;
  background:linear-gradient(90deg,var(--gold),rgba(201,162,39,.05));
  opacity:0;transition:opacity .28s ease;
}
.card:hover::before,.buyer-card:hover::before{opacity:1}

.card h3,.buyer-card h3{font-size:1.12rem;margin-bottom:8px}

/* --------------------------------------------------------------------------
   8. 表单
   -------------------------------------------------------------------------- */
input,select,textarea{
  font-family:var(--font-body);
  font-size:15px;
  padding:13px 15px;
  border:1px solid var(--border);
  border-radius:2px;
  background:var(--parchment);
  color:var(--text-dark);
  transition:border-color .2s ease,box-shadow .2s ease;
  width:100%;
}
input:focus,select:focus,textarea:focus{
  outline:none;
  border-color:var(--gold);
  box-shadow:0 0 0 3px rgba(201,162,39,.13);
}
label,.label{
  font-family:var(--font-mono);
  font-size:11px;
  letter-spacing:.1em;
  text-transform:uppercase;
  color:var(--text-muted);
  display:block;
  margin-bottom:7px;
}
.form-group{margin-bottom:18px}

/* --------------------------------------------------------------------------
   9. 表格（规格参数）
   -------------------------------------------------------------------------- */
table{width:100%;border-collapse:collapse;font-size:15px}
th,td{padding:13px 15px;text-align:left;border-bottom:1px solid var(--border)}
th{
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.11em;text-transform:uppercase;
  color:var(--gold-deep);
  background:var(--cream-2);
  font-weight:500;
}
tbody tr:hover{background:rgba(201,162,39,.045)}
tbody tr:last-child td{border-bottom:none}

/* --------------------------------------------------------------------------
   10. 页脚
   -------------------------------------------------------------------------- */
footer{
  background:linear-gradient(180deg,#080C14 0%,#05080E 100%)!important;
  border-top:1px solid var(--hairline);
  color:rgba(237,234,227,.72);
}
footer h4,footer .foot-title{
  font-family:var(--font-display);
  color:var(--gold-light);
  font-size:15px;
  letter-spacing:.02em;
  margin-bottom:14px;
}
footer a{color:rgba(237,234,227,.66);transition:color .2s ease}
footer a:hover{color:var(--gold-light)}
footer .logo{color:#FBF9F4}

/* --------------------------------------------------------------------------
   11. 新增组件：双入口（B端 / C端）
   -------------------------------------------------------------------------- */
.entry-grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(320px,1fr));
  gap:24px;
  max-width:var(--shell);
  margin:0 auto;
}
.entry-card{
  position:relative;
  display:flex;flex-direction:column;
  padding:44px 38px 38px;
  border-radius:var(--radius-lg);
  overflow:hidden;
  text-decoration:none;
  min-height:290px;
  border:1px solid var(--hairline);
  background:linear-gradient(165deg,rgba(26,35,56,.9) 0%,rgba(10,14,24,.94) 100%);
  transition:transform .3s cubic-bezier(.22,1,.36,1),box-shadow .3s ease,border-color .3s ease;
}
.entry-card::before{
  content:'';position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(520px 260px at 82% 8%,rgba(201,162,39,.16),transparent 62%);
  opacity:.85;transition:opacity .3s ease;
}
.entry-card:hover{
  transform:translateY(-6px);
  border-color:var(--gold);
  box-shadow:0 30px 70px rgba(0,0,0,.5),0 0 0 1px rgba(201,162,39,.1);
}
.entry-card:hover::before{opacity:1}
.entry-card>* {position:relative;z-index:2}

.entry-tag{
  display:inline-flex;align-self:flex-start;
  font-family:var(--font-mono);
  font-size:10.5px;letter-spacing:.16em;text-transform:uppercase;
  color:#0A0E18;background:var(--brass-grad);
  padding:5px 13px;border-radius:2px;font-weight:500;
  margin-bottom:22px;
}
.entry-card h3{
  font-size:1.62rem;color:#FBF9F4;margin:0 0 12px;font-weight:600;
}
.entry-card p{
  color:rgba(237,234,227,.78);
  font-size:15.5px;font-weight:300;line-height:1.72;
  margin:0 0 22px;flex:1;
}
.entry-list{
  list-style:none;padding:0;margin:0 0 26px;
  display:flex;flex-direction:column;gap:9px;
}
.entry-list li{
  font-size:14px;color:rgba(237,234,227,.7);
  display:flex;align-items:flex-start;gap:10px;line-height:1.55;
}
.entry-list li::before{
  content:'';flex:none;width:5px;height:5px;margin-top:8px;
  background:var(--gold);border-radius:50%;
}
.entry-go{
  display:inline-flex;align-items:center;gap:10px;
  color:var(--gold-light);font-weight:600;font-size:14.5px;letter-spacing:.03em;
}
.entry-go .arrow{
  transition:transform .28s cubic-bezier(.22,1,.36,1);
  display:inline-block;
}
.entry-card:hover .entry-go .arrow{transform:translateX(6px)}

/* --------------------------------------------------------------------------
   12. 新增组件：藏品陈列（Stamp Shop 中部展示）
   -------------------------------------------------------------------------- */
.showcase{
  background:
    radial-gradient(900px 460px at 50% -10%,rgba(201,162,39,.1),transparent 62%),
    linear-gradient(180deg,#0C1220 0%,#080C14 100%);
  color:var(--text-on-dark);
  padding:clamp(74px,8vw,118px) 5%;
}
.showcase-inner{max-width:var(--shell-wide);margin:0 auto}
.showcase-head{text-align:center;max-width:680px;margin:0 auto 52px}
.showcase-head .eyebrow{justify-content:center}
.showcase-head .eyebrow::after{content:'';width:26px;height:1px;background:var(--gold);flex:none;opacity:.75}
.showcase-head h2{color:#FBF9F4;margin-bottom:16px}
.showcase-head p{color:rgba(237,234,227,.76);font-weight:300;font-size:17px}

/* 精选邮票横向陈列 */
.strip{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(168px,1fr));
  gap:18px;
  margin:0 0 46px;
}
.strip-item{
  background:linear-gradient(165deg,rgba(26,35,56,.7),rgba(10,14,24,.85));
  border:1px solid var(--hairline-soft);
  border-radius:var(--radius);
  padding:14px;
  text-align:center;
  transition:transform .3s cubic-bezier(.22,1,.36,1),border-color .3s ease,box-shadow .3s ease;
}
.strip-item:hover{
  transform:translateY(-5px);
  border-color:var(--gold);
  box-shadow:0 20px 46px rgba(0,0,0,.46);
}
.strip-item .im{
  aspect-ratio:1/1;display:flex;align-items:center;justify-content:center;
  background:rgba(255,255,255,.03);
  border-radius:2px;overflow:hidden;margin-bottom:12px;
}
.strip-item img{width:100%;height:100%;object-fit:contain;transition:transform .4s ease}
.strip-item:hover img{transform:scale(1.06)}
.strip-item .nm{
  font-family:var(--font-display);
  font-size:14px;color:#FBF9F4;line-height:1.35;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
  min-height:2.7em;
}
.strip-item .yr{
  font-family:var(--font-mono);
  font-size:10.5px;letter-spacing:.1em;
  color:var(--gold);margin-top:6px;
}

/* --------------------------------------------------------------------------
   13. 购物车
   -------------------------------------------------------------------------- */
.cart-fab{
  position:fixed;right:22px;bottom:22px;z-index:900;
  display:inline-flex;align-items:center;gap:10px;
  padding:14px 22px;border-radius:999px;
  background:var(--brass-grad);color:#0A0E18;
  font-family:var(--font-body);font-weight:600;font-size:14.5px;
  border:none;cursor:pointer;
  box-shadow:0 12px 34px rgba(0,0,0,.32),var(--shadow-gold);
  transition:transform .24s cubic-bezier(.22,1,.36,1),box-shadow .24s ease;
}
.cart-fab:hover{transform:translateY(-3px);box-shadow:0 18px 44px rgba(0,0,0,.38),0 14px 34px rgba(201,162,39,.36)}
.cart-fab .cnt{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:22px;height:22px;padding:0 6px;border-radius:999px;
  background:#0A0E18;color:var(--gold-light);
  font-family:var(--font-mono);font-size:12px;font-weight:500;
}

/* 结账/加购按钮组 */
.buy-row{display:flex;gap:12px;flex-wrap:wrap;margin:26px 0}
.btn-cart{
  background:var(--brass-grad);color:#0A0E18;
  box-shadow:var(--shadow-gold);
}
.btn-cart:hover{transform:translateY(-2px);box-shadow:0 16px 40px rgba(201,162,39,.36)}
.btn-checkout{
  background:transparent;color:var(--gold-deep);
  border:1.5px solid var(--gold);
}
.btn-checkout:hover{background:rgba(201,162,39,.1);transform:translateY(-2px)}

/* 数量选择 */
.qty{
  display:inline-flex;align-items:center;
  border:1px solid var(--border);border-radius:2px;overflow:hidden;background:var(--parchment);
}
.qty button{
  width:42px;height:46px;border:none;background:transparent;cursor:pointer;
  font-size:19px;color:var(--text-muted);
  transition:background .18s ease,color .18s ease;
}
.qty button:hover{background:rgba(201,162,39,.12);color:var(--gold-deep)}
.qty input{
  width:58px;height:46px;text-align:center;border:none;
  border-left:1px solid var(--border);border-right:1px solid var(--border);
  border-radius:0;font-family:var(--font-mono);font-size:15px;
  background:transparent;
}
.qty input:focus{box-shadow:none}

/* 轻提示 */
.toast{
  position:fixed;left:50%;bottom:96px;transform:translate(-50%,20px);
  background:var(--ink);color:var(--text-on-dark);
  padding:13px 24px;border-radius:2px;
  border:1px solid var(--hairline);
  font-size:14.5px;z-index:950;
  opacity:0;pointer-events:none;
  transition:opacity .26s ease,transform .26s cubic-bezier(.22,1,.36,1);
  box-shadow:0 16px 44px rgba(0,0,0,.32);
}
.toast.show{opacity:1;transform:translate(-50%,0)}

/* --------------------------------------------------------------------------
   14. 详情页 / 商品页 结构
   -------------------------------------------------------------------------- */
.detail{
  display:grid;
  grid-template-columns:minmax(300px,470px) 1fr;
  gap:48px;
  max-width:var(--shell-wide);
  margin:0 auto;
  padding:26px 5% 20px;
}
@media(max-width:900px){.detail{grid-template-columns:1fr;gap:32px}}

.detail-visual{
  background:var(--parchment);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  padding:26px;
  box-shadow:var(--shadow-md);
  position:sticky;top:96px;
}
@media(max-width:900px){.detail-visual{position:static}}
.detail-visual .frame{
  aspect-ratio:1/1;display:flex;align-items:center;justify-content:center;
  background:
    radial-gradient(circle at 50% 40%,rgba(201,162,39,.07),transparent 62%),
    var(--cream-2);
  border:1px solid var(--border);
  border-radius:var(--radius);
  overflow:hidden;
}
.detail-visual img{width:100%;height:100%;object-fit:contain}

.detail-title{
  font-size:clamp(1.7rem,3.2vw,2.5rem);
  margin:0 0 10px;line-height:1.14;
}
.detail-sub{
  font-family:var(--font-mono);
  font-size:11.5px;letter-spacing:.14em;text-transform:uppercase;
  color:var(--gold-deep);margin-bottom:20px;
}
.price-block{
  display:flex;align-items:baseline;gap:14px;flex-wrap:wrap;
  padding:20px 0;border-top:1px solid var(--border);border-bottom:1px solid var(--border);
  margin:22px 0;
}
.price-main{
  font-family:var(--font-display);
  font-size:2.5rem;font-weight:600;color:var(--text-dark);line-height:1;
}
.price-note{font-size:14px;color:var(--text-muted);font-weight:300}

.spec-table{margin:8px 0 0}
.spec-table tr td:first-child{
  font-family:var(--font-mono);
  font-size:11px;letter-spacing:.1em;text-transform:uppercase;
  color:var(--text-muted);width:38%;
}
.spec-table tr td:last-child{font-weight:500}

/* 内容分节 */
.prose{max-width:var(--shell);margin:0 auto;padding:0 5%}
.prose h2{
  font-size:1.6rem;margin:52px 0 18px;
  padding-bottom:13px;border-bottom:1px solid var(--border);
  position:relative;
}
.prose h2::after{
  content:'';position:absolute;left:0;bottom:-1px;
  width:52px;height:2px;background:var(--brass-grad);
}
.prose p{font-size:16.5px;line-height:1.8;color:#2A2E36}
.prose ul{padding-left:22px;margin:0 0 1.2em}
.prose li{margin-bottom:9px;line-height:1.7;color:#2A2E36}

/* 使用场景卡 */
.uses{
  display:grid;grid-template-columns:repeat(auto-fit,minmax(230px,1fr));
  gap:16px;margin:24px 0;
}
.use{
  background:var(--parchment);
  border:1px solid var(--border);border-left:2px solid var(--gold);
  border-radius:var(--radius);padding:20px 22px;
  transition:transform .26s ease,box-shadow .26s ease;
}
.use:hover{transform:translateY(-3px);box-shadow:var(--shadow-md)}
.use h4{
  font-family:var(--font-body);font-size:14px;font-weight:600;
  letter-spacing:.02em;margin:0 0 7px;color:var(--text-dark);
}
.use p{font-size:14.5px;color:var(--text-muted);margin:0;line-height:1.65;font-weight:300}

/* --------------------------------------------------------------------------
   15. 响应式
   -------------------------------------------------------------------------- */
@media(max-width:820px){
  :root{--sec-pad:68px}
  body{font-size:16px}
  .detail-visual{position:static}
  .entry-grid{grid-template-columns:1fr}
  .entry-card{padding:34px 26px;min-height:auto}
}
@media(max-width:560px){
  h1{font-size:2rem}
  .hero{padding:64px 5% 56px}
  .hero-stats{grid-template-columns:repeat(2,1fr)}
}

/* --------------------------------------------------------------------------
   16. 无障碍：减少动效
   -------------------------------------------------------------------------- */
@media(prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.01ms!important;
    animation-iteration-count:1!important;
    transition-duration:.01ms!important;
    scroll-behavior:auto!important;
  }
}

/* ==========================================================================
   17. WhatsApp 悬浮入口 — 右侧垂直居中常驻
   -------------------------------------------------------------------------- */
.wa-float{
  position:fixed!important;
  right:0!important;
  left:auto!important;
  top:50%!important;
  bottom:auto!important;
  transform:translateY(-50%)!important;
  z-index:900!important;
  display:flex!important;
  flex-direction:column!important;
  align-items:center!important;
  justify-content:center!important;
  gap:12px!important;
  padding:16px 10px!important;
  background:linear-gradient(180deg,#0E1626 0%, #0A0E18 100%)!important;
  border:1px solid var(--hairline)!important;
  border-right:none!important;
  border-radius:12px 0 0 12px!important;
  box-shadow:-8px 0 32px rgba(0,0,0,.46)!important;
  text-decoration:none!important;
  transition:transform .26s cubic-bezier(.22,1,.36,1), box-shadow .26s ease!important;
}
.wa-float:hover{
  transform:translateY(-50%) translateX(-4px)!important;
  box-shadow:-12px 0 40px rgba(201,162,39,.34)!important;
}
.wa-float__icon{
  display:flex!important;
  align-items:center!important;
  justify-content:center!important;
  flex:0 0 auto!important;
  width:56px!important;
  height:56px!important;
  border-radius:50%!important;
  background:var(--gold)!important;
  box-shadow:0 8px 26px rgba(201,162,39,.5)!important;
  transition:transform .22s ease, box-shadow .22s ease!important;
}
.wa-float:hover .wa-float__icon{
  transform:scale(1.08)!important;
  box-shadow:0 10px 32px rgba(201,162,39,.68)!important;
}
.wa-float__icon svg{
  width:32px!important;
  height:32px!important;
  fill:#fff!important;
  display:block!important;
}
.wa-float__label{
  display:block!important;
  writing-mode:vertical-rl!important;
  text-orientation:mixed!important;
  transform:rotate(180deg)!important;
  letter-spacing:.09em!important;
  font-family:var(--font-body)!important;
  font-size:11.5px!important;
  font-weight:600!important;
  text-transform:uppercase!important;
  color:var(--gold-light)!important;
  background:transparent!important;
  border:none!important;
  box-shadow:none!important;
  padding:0!important;
  white-space:nowrap!important;
}
/* 手机端收窄 */
@media (max-width:640px){
  .wa-float{padding:12px 7px!important;gap:9px!important;border-radius:10px 0 0 10px!important}
  .wa-float__icon{width:46px!important;height:46px!important}
  .wa-float__icon svg{width:26px!important;height:26px!important}
  .wa-float__label{font-size:10px!important;letter-spacing:.06em!important}
}

/* ==========================================================================
   18. 移动端导航（汉堡菜单）— 修复窄屏导航溢出导致横向滚动
   -------------------------------------------------------------------------- */
.nav-toggle{display:none}
@media(max-width:900px){
  .nav-toggle{
    display:inline-flex!important;align-items:center;justify-content:center;
    width:42px;height:42px;flex:0 0 auto;
    border:1px solid var(--hairline);border-radius:var(--radius);
    background:transparent!important;color:var(--gold-light)!important;
    font-size:19px;line-height:1;cursor:pointer;
  }
  header{position:sticky;top:0;z-index:920}
  header nav{
    display:none!important;
    position:absolute;left:0;right:0;top:100%;
    flex-direction:column;align-items:stretch;gap:0;
    background:rgba(10,14,24,.985);
    -webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);
    border-top:1px solid var(--hairline);
    padding:6px 5% 14px;
    box-shadow:0 20px 46px rgba(0,0,0,.5);
  }
  header nav.nav-open{display:flex!important}
  header nav a{
    padding:13px 2px;font-size:14px;
    border-bottom:1px solid var(--hairline-soft);
  }
  header nav a::after{display:none}
  header nav a:last-child{border-bottom:none}
  header nav a.nav-cta{margin-top:10px;text-align:center;padding:12px 16px}
}

/* 结账页栅格窄屏折叠 */
@media(max-width:900px){
  .checkout-grid{grid-template-columns:1fr!important;gap:26px!important}
  .checkout-grid aside{position:static!important}
}