/* ============================================================
   新葡萄牌局 · putao-qi.com.cn
   共享站点样式 /assets/site.css
   ============================================================ */

/* ---------- 1. 设计变量 ---------- */
:root{
  --ink:#101A33;
  --ink-deep:#0A1124;
  --ink-2:#2A1046;
  --grape:#6B2FA0;
  --grape-light:#9A5BD6;
  --vine:#3C8C5A;
  --vine-light:#A8D8B9;
  --gold:#E8B34B;
  --gold-deep:#8A6420;
  --paper:#F4F1E8;
  --mist:#9C97B8;
  --line:rgba(156,151,184,.28);
  --radius-sm:10px;
  --radius:14px;
  --radius-lg:18px;
  --radius-pill:999px;
  --shadow-hard:8px 8px 0 rgba(5,9,20,.55);
  --shadow-hard-sm:5px 5px 0 rgba(5,9,20,.55);
  --font-heading:"PingFang SC","Hiragino Sans GB","Source Han Sans SC","Noto Sans SC","Microsoft YaHei",system-ui,-apple-system,sans-serif;
  --font-body:var(--font-heading);
  --font-mono:"JetBrains Mono","Cascadia Mono","SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
  --maxw:1240px;
}

/* ---------- 2. 重置与基础 ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  color:var(--paper);
  font-family:var(--font-body);
  font-size:17px;
  line-height:1.85;
  -webkit-font-smoothing:antialiased;
  background-color:var(--ink);
  background-image:
    radial-gradient(760px 500px at 6% -8%, rgba(107,47,160,.40), transparent 70%),
    radial-gradient(680px 440px at 98% 0%, rgba(60,140,90,.22), transparent 72%),
    linear-gradient(180deg,#0C1428 0%,#101A33 44%,#0B1226 100%);
  background-repeat:no-repeat;
  background-attachment:scroll;
}
img,svg,video{max-width:100%;height:auto;display:block}
ul,ol{margin:0;padding:0;list-style:none}
button,input,select,textarea{font:inherit;color:inherit}
button{background:none;border:0;padding:0;cursor:pointer}
a{color:inherit;text-decoration:none}
table{border-collapse:collapse;width:100%}
p{margin:0 0 1.05em}
h1,h2,h3,h4,h5{margin:0 0 .55em;font-family:var(--font-heading);font-weight:900;line-height:1.22;letter-spacing:-.01em}
h1{font-size:clamp(34px,5.2vw,48px)}
h2{font-size:clamp(24px,3.2vw,32px)}
h3{font-size:clamp(19px,2vw,22px)}
h4{font-size:17px}
strong{font-weight:800;color:#fff}
::selection{background:var(--grape);color:#fff}
:focus-visible{outline:3px solid var(--gold);outline-offset:3px;border-radius:6px}
[hidden]{display:none !important}

/* ---------- 3. 布局容器 ---------- */
.container{width:100%;max-width:var(--maxw);margin:0 auto;padding:0 20px}
.container-narrow{max-width:880px}
.section{padding:clamp(40px,6vw,76px) 0}
.section-head{
  display:flex;flex-wrap:wrap;align-items:flex-end;justify-content:space-between;
  gap:16px;margin-bottom:clamp(20px,3vw,36px);
}
.section-head h2,.section-head h1{margin-bottom:0}

/* ---------- 4. 文本工具类 ---------- */
.mono{font-family:var(--font-mono);font-size:.83em;letter-spacing:.06em}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;margin:0 0 14px;
  font-family:var(--font-mono);font-size:13px;font-weight:600;
  letter-spacing:.18em;text-transform:uppercase;color:var(--vine-light);
}
.eyebrow::before{content:"";width:26px;height:2px;border-radius:2px;background:linear-gradient(90deg,var(--gold),rgba(232,179,75,0))}
.lead{font-size:18px;line-height:1.9;color:#D9D4E8}
.text-gold{color:var(--gold)}
.text-vine{color:var(--vine-light)}
.text-mist{color:var(--mist)}
.sr-only{
  position:absolute;width:1px;height:1px;padding:0;margin:-1px;
  overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0;
}

/* ---------- 5. 按钮 ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:10px 20px;border-radius:var(--radius-pill);
  border:2px solid transparent;font-size:15px;font-weight:800;line-height:1.4;
  white-space:nowrap;text-align:center;
  transition:transform .18s ease-out,box-shadow .18s ease-out,background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out;
}
.btn:active{transform:translateY(2px)}
.btn-primary{background:var(--grape);border-color:var(--grape-light);color:#fff;box-shadow:0 6px 0 rgba(5,9,20,.55)}
.btn-primary:hover{background:var(--grape-light);transform:translateY(-2px);box-shadow:0 9px 0 rgba(5,9,20,.5)}
.btn-gold{background:var(--gold);border-color:#F3CC7C;color:#2A1046;box-shadow:0 6px 0 rgba(138,100,32,.75)}
.btn-gold:hover{background:#F3CC7C;transform:translateY(-2px);box-shadow:0 9px 0 rgba(138,100,32,.7)}
.btn-ghost{background:rgba(60,140,90,.12);border-color:var(--vine);color:var(--vine-light)}
.btn-ghost:hover{background:rgba(60,140,90,.3);color:#fff;transform:translateY(-2px)}
.btn-sm{padding:8px 16px;font-size:14px}

/* ---------- 6. 页头 ---------- */
.site-header{
  position:sticky;top:0;z-index:90;
  padding:12px 0 10px;
  background:linear-gradient(180deg,rgba(10,17,36,.95) 0%,rgba(10,17,36,.72) 68%,rgba(10,17,36,.28) 100%);
  -webkit-backdrop-filter:blur(10px);
  backdrop-filter:blur(10px);
  transition:padding .22s ease-out;
}
.site-header.is-scrolled{padding-top:6px}
.header-shell{position:relative}
.header-bar{
  display:flex;align-items:center;gap:14px;
  transition:transform .22s ease-out;
}
.site-header.is-scrolled .header-bar{transform:translateY(-4px)}

.skip-link{
  position:absolute;left:20px;top:-110px;z-index:200;
  padding:10px 20px;border-radius:0 0 12px 12px;
  background:var(--gold);color:#241033;font-weight:800;font-size:15px;
  transition:top .18s ease-out;
}
.skip-link:focus{top:0}

/* 品牌岛 */
.brand{
  flex:0 0 auto;display:inline-flex;align-items:center;gap:12px;
  padding:5px 20px 5px 6px;border:2px solid var(--grape);border-radius:var(--radius-pill);
  background:linear-gradient(140deg,rgba(42,16,70,.96),rgba(16,26,51,.96));
  box-shadow:0 8px 0 rgba(5,9,20,.5);
  transition:box-shadow .2s ease-out,border-color .2s ease-out;
}
.brand:hover{border-color:var(--grape-light)}
.site-header.is-scrolled .brand{box-shadow:0 14px 26px rgba(5,9,20,.65)}
.brand-mark{
  width:44px;height:44px;flex:0 0 auto;border-radius:50%;
  display:grid;place-items:center;
  font-size:20px;font-weight:900;color:#2A1046;
  background:radial-gradient(circle at 32% 28%,#F5D089,var(--gold) 45%,var(--gold-deep));
  box-shadow:inset 0 -3px 0 rgba(0,0,0,.28);
}
.brand-text{display:flex;flex-direction:column;line-height:1.15;min-width:0}
.brand-name{font-size:18px;font-weight:900;letter-spacing:.02em;white-space:nowrap}
.brand-tagline{
  font-family:var(--font-mono);font-size:11px;letter-spacing:.08em;
  color:var(--vine-light);white-space:nowrap;
}

/* 移动端按钮 */
.nav-toggle{
  display:none;align-items:center;gap:9px;
  margin-left:auto;padding:10px 16px;
  border:2px solid var(--vine);border-radius:var(--radius-pill);
  background:rgba(16,26,51,.92);color:var(--vine-light);
  font-size:15px;font-weight:800;
}
.nav-toggle-bars{position:relative;display:block;width:18px;height:2px;background:currentColor;transition:background .2s ease-out}
.nav-toggle-bars::before,.nav-toggle-bars::after{
  content:"";position:absolute;left:0;width:18px;height:2px;
  background:currentColor;transition:transform .2s ease-out;
}
.nav-toggle-bars::before{top:-6px}
.nav-toggle-bars::after{top:6px}
.site-header[data-open] .nav-toggle-bars{background:transparent}
.site-header[data-open] .nav-toggle-bars::before{transform:translateY(6px) rotate(45deg)}
.site-header[data-open] .nav-toggle-bars::after{transform:translateY(-6px) rotate(-45deg)}

/* 导航岛 */
.nav-panel{
  flex:1 1 auto;min-width:0;
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:6px 8px 6px 12px;
  border:2px solid rgba(168,216,185,.32);border-radius:var(--radius-pill);
  background:rgba(16,26,51,.88);
  box-shadow:0 8px 0 rgba(5,9,20,.5);
  transition:box-shadow .2s ease-out,border-color .2s ease-out;
}
.site-header.is-scrolled .nav-panel{box-shadow:0 14px 26px rgba(5,9,20,.65)}
.nav-list{display:flex;align-items:center;gap:4px;min-width:0}
.nav-item{display:flex}
.nav-link{
  display:inline-flex;align-items:center;
  padding:7px 13px;border:1.5px solid rgba(60,140,90,.6);border-radius:var(--radius-pill);
  font-size:14.5px;font-weight:700;color:#EDEAF7;white-space:nowrap;
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out,transform .18s ease-out;
}
.nav-link:hover{color:var(--vine-light);border-color:var(--vine-light);background:rgba(60,140,90,.16);transform:translateY(-1px)}
.nav-link[aria-current="page"]{
  background:var(--grape);border-color:var(--grape-light);color:#fff;
  box-shadow:0 0 0 3px rgba(107,47,160,.3);
}
.header-tools{display:flex;align-items:center;gap:8px;flex:0 0 auto}
.search-field{
  display:flex;align-items:center;gap:6px;
  padding:0 12px;border:1.5px solid rgba(232,179,75,.55);border-radius:var(--radius-pill);
  background:rgba(10,17,36,.65);
  transition:border-color .18s ease-out,box-shadow .18s ease-out;
}
.search-field:focus-within{border-color:var(--gold);box-shadow:0 0 0 3px rgba(232,179,75,.22)}
.search-input{
  width:170px;padding:8px 0;border:0;outline:none;background:none;
  font-family:var(--font-mono);font-size:13px;letter-spacing:.02em;
}
.search-input::placeholder{color:var(--mist);opacity:1}
.search-input::-webkit-search-cancel-button{-webkit-appearance:none;appearance:none}

/* 滚动进度 */
.scroll-progress{
  position:absolute;left:0;bottom:0;height:3px;width:0;max-width:100%;
  z-index:5;pointer-events:none;border-radius:0 3px 3px 0;
  background:linear-gradient(90deg,var(--grape),var(--vine) 55%,var(--gold));
  transition:width .09s linear;
}

/* ---------- 7. 页脚 ---------- */
.site-footer{
  position:relative;
  margin-top:clamp(56px,8vw,96px);
  padding:clamp(40px,5vw,64px) 0 26px;
  border-top:2px solid var(--grape);
  background:linear-gradient(180deg,rgba(42,16,70,.6) 0%,rgba(10,17,36,.98) 58%),var(--ink-deep);
}
.site-footer::before{
  content:"";position:absolute;left:0;top:-2px;width:100%;height:2px;
  background:linear-gradient(90deg,var(--gold),var(--vine) 38%,var(--grape) 72%,rgba(107,47,160,0));
}
.footer-top{
  display:grid;grid-template-columns:1.35fr 1fr 1.15fr;
  gap:clamp(24px,4vw,56px);align-items:start;
}
.footer-brand-name{
  display:inline-flex;align-items:center;gap:10px;
  margin:0 0 12px;font-size:22px;font-weight:900;letter-spacing:.02em;
}
.footer-brand-name::before{
  content:"";width:12px;height:12px;border-radius:3px;background:var(--gold);
  transform:rotate(45deg);box-shadow:0 0 0 4px rgba(232,179,75,.16);
}
.footer-summary{margin:0 0 16px;max-width:34em;font-size:15.5px;line-height:1.9;color:#CFC9E2}
.footer-badges{display:flex;flex-wrap:wrap;gap:8px}
.footer-col{min-width:0}
.footer-heading{
  margin:0 0 14px;font-family:var(--font-mono);font-size:12.5px;font-weight:600;
  letter-spacing:.16em;text-transform:uppercase;color:var(--mist);
}
.footer-links{display:flex;flex-direction:column;gap:9px}
.footer-link{
  display:inline-flex;align-items:center;gap:9px;width:fit-content;
  font-size:15.5px;color:var(--vine-light);
  transition:color .18s ease-out,transform .18s ease-out;
}
.footer-link::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--vine);
  transition:background .18s ease-out,box-shadow .18s ease-out;
}
.footer-link:hover{color:var(--gold);transform:translateX(3px)}
.footer-link:hover::before{background:var(--gold);box-shadow:0 0 0 3px rgba(232,179,75,.2)}
.footer-contact{
  padding:20px 22px;border:2px solid rgba(154,91,214,.45);border-radius:var(--radius-lg);
  background:rgba(42,16,70,.45);box-shadow:var(--shadow-hard-sm);
}
.footer-contact-heading{margin:0 0 14px;font-size:17px;font-weight:800;color:var(--gold)}
.contact-list{display:flex;flex-direction:column;gap:11px}
.contact-item{display:flex;flex-direction:column;gap:2px}
.contact-label{
  font-family:var(--font-mono);font-size:11.5px;letter-spacing:.14em;
  text-transform:uppercase;color:var(--mist);
}
.contact-value{font-size:15px;line-height:1.75;color:#E7E3F3;word-break:break-word}
.contact-value--mono{font-family:var(--font-mono);letter-spacing:.02em;color:var(--gold)}
.footer-note{margin:14px 0 0;font-size:13.5px;line-height:1.8;color:var(--mist)}
.footer-bottom{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;
  gap:10px 28px;margin-top:clamp(28px,4vw,44px);padding-top:20px;
  border-top:1px dashed var(--line);
}
.icp{margin:0;font-family:var(--font-mono);font-size:13px;letter-spacing:.05em;color:var(--vine-light)}
.footer-meta{margin:0;font-size:13px;color:var(--mist)}

/* ---------- 8. 徽标与标签 ---------- */
.badge{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 11px;border-radius:var(--radius-pill);
  border:1.5px solid rgba(232,179,75,.75);background:rgba(232,179,75,.08);
  font-family:var(--font-mono);font-size:12px;letter-spacing:.1em;
  text-transform:uppercase;color:var(--gold);
}
.chip{
  display:inline-flex;align-items:center;gap:6px;
  padding:4px 12px;border-radius:var(--radius-pill);
  border:1.5px solid rgba(168,216,185,.45);background:rgba(60,140,90,.12);
  font-size:13px;color:var(--vine-light);
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out;
}
.chip:hover{background:rgba(60,140,90,.3);border-color:var(--vine-light);color:#fff}
.chip.is-active,.chip[aria-pressed="true"]{background:var(--vine);border-color:var(--vine-light);color:#fff}

/* ---------- 9. 网格与卡片 ---------- */
.grid{display:grid;gap:clamp(14px,2vw,22px)}
.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-split{grid-template-columns:minmax(0,7fr) minmax(0,5fr)}
.grid-split-alt{grid-template-columns:minmax(0,4fr) minmax(0,8fr)}

.card{
  position:relative;
  padding:clamp(18px,2.4vw,26px);
  border:2px solid rgba(154,91,214,.42);border-radius:var(--radius-lg);
  background:linear-gradient(155deg,rgba(42,16,70,.92),rgba(16,26,51,.94));
  box-shadow:var(--shadow-hard);
  transition:transform .2s ease-out,border-color .2s ease-out,box-shadow .2s ease-out;
}
.card:hover{transform:translateY(-4px);border-color:var(--grape-light);box-shadow:10px 14px 0 rgba(5,9,20,.6)}
.card-title{margin:0 0 10px;font-size:20px}
.card p:last-child,.card ul:last-child{margin-bottom:0}
.card-tilt{transform:rotate(-1.2deg)}
.card-tilt:hover{transform:rotate(-1.2deg) translateY(-4px)}
.card-tilt--alt{transform:rotate(1.1deg)}
.card-tilt--alt:hover{transform:rotate(1.1deg) translateY(-4px)}

.stat{
  display:flex;flex-direction:column;gap:4px;
  padding:14px 16px;border-left:3px solid var(--gold);
  border-radius:0 12px 12px 0;background:rgba(10,17,36,.5);
}
.stat-value{
  font-family:var(--font-mono);font-size:clamp(22px,3vw,30px);font-weight:700;
  line-height:1.2;letter-spacing:.02em;color:var(--gold);
}
.stat-label{font-size:13.5px;color:var(--mist)}

/* ---------- 10. 分隔与装饰 ---------- */
.divider{
  height:2px;border:0;margin:clamp(28px,4vw,48px) 0;border-radius:2px;
  background:linear-gradient(90deg,var(--grape),var(--vine) 45%,rgba(60,140,90,0) 92%);
}
.vine-rule{position:relative;height:26px;margin:clamp(20px,3vw,36px) 0}
.vine-rule::before{
  content:"";position:absolute;left:0;right:0;top:50%;height:1px;
  background:linear-gradient(90deg,rgba(60,140,90,0),rgba(60,140,90,.6) 18%,rgba(107,47,160,.7) 55%,rgba(107,47,160,0) 92%);
}
.vine-rule::after{
  content:"";position:absolute;left:16%;top:50%;width:10px;height:10px;border-radius:3px;
  background:var(--gold);transform:translateY(-50%) rotate(45deg);
  box-shadow:0 0 0 4px rgba(232,179,75,.14);
}

/* ---------- 11. 图片容器 ---------- */
.img-frame{
  position:relative;overflow:hidden;
  aspect-ratio:16 / 10;width:100%;
  border:2px solid rgba(168,216,185,.35);border-radius:var(--radius-lg);
  background:linear-gradient(150deg,var(--ink-2),#160C26 70%);
}
.img-frame::after{
  content:"";position:absolute;right:10px;bottom:10px;width:26px;height:26px;
  border-radius:6px;border:2px solid rgba(232,179,75,.55);pointer-events:none;
}
.img-frame img{width:100%;height:100%;object-fit:cover}
.img-frame--wide{aspect-ratio:21 / 9}
.img-frame--portrait{aspect-ratio:3 / 4}
.img-frame--square{aspect-ratio:1 / 1}

/* ---------- 12. 面包屑与目录 ---------- */
.breadcrumbs{padding:18px 0 0}
.breadcrumb-list{
  display:flex;flex-wrap:wrap;align-items:center;gap:8px;
  font-family:var(--font-mono);font-size:12.5px;letter-spacing:.06em;color:var(--mist);
}
.breadcrumb-item{display:inline-flex;align-items:center;gap:8px}
.breadcrumb-item + .breadcrumb-item::before{content:"/";color:rgba(156,151,184,.6)}
.breadcrumb-item a{color:var(--vine-light)}
.breadcrumb-item a:hover{color:var(--gold)}
.breadcrumb-item[aria-current="page"]{color:var(--paper)}

.toc{padding:16px 18px;border:2px solid rgba(168,216,185,.3);border-radius:var(--radius);background:rgba(10,17,36,.5)}
.toc-title{
  margin:0 0 10px;font-family:var(--font-mono);font-size:12px;font-weight:600;
  letter-spacing:.16em;text-transform:uppercase;color:var(--mist);
}
.toc-list{display:flex;flex-direction:column;gap:6px}
.toc-link{
  display:block;padding:6px 10px;border-left:2px solid transparent;border-radius:0 8px 8px 0;
  font-size:15px;color:#D5D0E6;
  transition:background-color .18s ease-out,color .18s ease-out,border-color .18s ease-out;
}
.toc-link:hover{background:rgba(107,47,160,.22);color:#fff}
.toc-link[aria-current="true"]{border-left-color:var(--gold);background:rgba(107,47,160,.3);color:#fff}

/* ---------- 13. 折叠面板与提示 ---------- */
.panel{
  border:2px solid rgba(154,91,214,.4);border-radius:var(--radius);
  background:rgba(42,16,70,.42);overflow:hidden;
  transition:border-color .2s ease-out;
}
.panel + .panel{margin-top:12px}
.panel[data-open="true"]{border-color:var(--grape-light)}
.panel-head{
  width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;
  padding:16px 20px;text-align:left;font-size:17px;font-weight:800;color:var(--paper);
  transition:background-color .18s ease-out;
}
.panel-head:hover{background:rgba(107,47,160,.18)}
.panel-icon{
  flex:0 0 auto;width:22px;height:22px;border-radius:50%;
  display:grid;place-items:center;
  border:1.5px solid var(--gold);color:var(--gold);
  font-family:var(--font-mono);font-size:14px;line-height:1;
  transition:transform .2s ease-out;
}
.panel[data-open="true"] .panel-icon{transform:rotate(45deg)}
.panel-body{padding:0 20px 18px;font-size:16px;color:#D5D0E6}
.callout{padding:16px 20px;border:2px dashed rgba(168,216,185,.45);border-radius:var(--radius);background:rgba(60,140,90,.1)}
.empty-note{
  margin:24px 0;padding:16px 20px;border:2px dashed rgba(156,151,184,.4);
  border-radius:var(--radius);font-size:15px;color:var(--mist);
}

/* ---------- 14. 长文排印 ---------- */
.prose{max-width:36em}
.prose h2{margin-top:1.6em}
.prose h3{margin-top:1.3em}
.prose ul{display:flex;flex-direction:column;gap:8px;margin:0 0 1.2em}
.prose li{position:relative;padding-left:20px}
.prose li::before{
  content:"";position:absolute;left:0;top:.74em;width:8px;height:8px;
  border-radius:2px;background:var(--vine);transform:rotate(45deg);
}
.prose code{
  padding:2px 7px;border-radius:6px;
  font-family:var(--font-mono);font-size:.86em;
  background:rgba(107,47,160,.28);color:var(--vine-light);
}
.prose blockquote{
  margin:0 0 1.2em;padding:14px 18px;border-left:3px solid var(--gold);
  border-radius:0 12px 12px 0;background:rgba(232,179,75,.08);color:#E4DFF0;
}

/* ---------- 15. 响应式 ---------- */
@media (max-width:1200px){
  .brand-tagline{display:none}
  .brand{padding-right:14px}
  .search-input{width:140px}
  .nav-link{padding:7px 11px;font-size:14px}
}

@media (max-width:1024px){
  .site-header{padding:10px 0 8px}
  .header-bar{gap:10px}
  .nav-toggle{display:inline-flex}
  .brand-tagline{display:none}
  .nav-panel{
    position:absolute;left:0;right:0;top:calc(100% + 10px);
    display:none;flex-direction:column;align-items:stretch;justify-content:flex-start;
    gap:14px;padding:16px;border-radius:22px;
    max-height:min(72vh,560px);overflow-y:auto;
    background:rgba(16,26,51,.98);
    box-shadow:0 18px 40px rgba(5,9,20,.7);
  }
  .site-header[data-open] .nav-panel,
  .nav-panel[data-open]{display:flex;animation:panel-in .2s ease-out}
  .nav-list{flex-direction:column;align-items:stretch;gap:8px}
  .nav-item{width:100%}
  .nav-link{width:100%;justify-content:flex-start;padding:12px 16px;font-size:16px}
  .header-tools{flex-direction:column;align-items:stretch;gap:10px;padding-top:14px;border-top:1px dashed var(--line)}
  .search-field{width:100%}
  .search-input{width:100%;padding:11px 0}
  .header-tools .btn{width:100%}
}

@keyframes panel-in{
  from{opacity:0;transform:translateY(-8px)}
  to{opacity:1;transform:translateY(0)}
}

@media (max-width:900px){
  .grid-3,.grid-4{grid-template-columns:repeat(2,minmax(0,1fr))}
  .grid-split,.grid-split-alt{grid-template-columns:minmax(0,1fr)}
  .footer-top{grid-template-columns:repeat(2,minmax(0,1fr))}
  .footer-brand{grid-column:1 / -1}
  .footer-contact{grid-column:1 / -1}
}

@media (max-width:620px){
  body{font-size:16px}
  .container{padding:0 16px}
  .grid-2,.grid-3,.grid-4{grid-template-columns:minmax(0,1fr)}
  .footer-top{grid-template-columns:minmax(0,1fr)}
  .card-tilt,.card-tilt--alt{transform:none}
  .card-tilt:hover,.card-tilt--alt:hover{transform:translateY(-4px)}
  .card{box-shadow:6px 6px 0 rgba(5,9,20,.55)}
  .skip-link{left:16px}
  .brand-mark{width:38px;height:38px;font-size:18px}
  .brand-name{font-size:16px}
}

/* ---------- 16. 降低动效 ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{
    animation-duration:.001ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.001ms !important;
    scroll-behavior:auto !important;
  }
  html{scroll-behavior:auto}
  .site-header.is-scrolled .header-bar{transform:none}
  .card:hover,.card-tilt:hover,.card-tilt--alt:hover{transform:none}
  .card-tilt,.card-tilt--alt{transform:none}
  .scroll-progress{transition:none}
}