/* ==========================================================================
   纵横国际 Agriculture International — 全站统一样式表（原创）
   组织顺序：Variables → Reset/Base → Typography → Wrap → Topbar → Header/Nav
   → Buttons → Breadcrumb → Hero → Section → Grid/Card → Article Card → Meta
   → Tag → Overview/Chain → Concepts → Notes → Content/Article → Table/Callout
   → FAQ → CTA → Footer → Back To Top → Responsive
   ========================================================================== */

/* ---------- CSS Variables ---------- */
:root{
  --navy-950:#04141a;
  --navy-900:#071e26;
  --navy-800:#0c2c36;
  --navy-700:#143c48;
  --green-700:#12793f;
  --green-600:#178a4c;
  --green-500:#2cb864;
  --green-400:#5bd68a;
  --cyan-400:#22d3ee;
  --cyan-300:#67e8f9;
  --water-500:#2b86ee;
  --amber-500:#e8912b;
  --ice-50:#f2faf5;
  --ice-100:#e3f3ea;
  --ice-200:#cfe8da;
  --white:#ffffff;
  --text-900:#0d1f19;
  --text-700:#2f463d;
  --text-500:#54695f;
  --text-400:#7d9389;
  --line:#dcebe2;
  --line-soft:#ebf4ee;
  --success:#178a4c;
  --radius-lg:18px;
  --radius-md:12px;
  --radius-sm:8px;
  --shadow-card:0 4px 24px rgba(12,44,54,.07);
  --shadow-pop:0 12px 40px rgba(12,44,54,.16);
  --maxw:1240px;
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
}

/* ---------- Reset / Base ---------- */
*,*::before,*::after{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:var(--font);
  color:var(--text-700);
  background:var(--white);
  line-height:1.75;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:var(--green-700);text-decoration:none;}
a:hover{text-decoration:underline;}
:focus-visible{outline:2px solid var(--water-500);outline-offset:2px;}

/* ---------- Typography ---------- */
h1,h2,h3,h4{color:var(--text-900);line-height:1.4;margin:0 0 .6em;font-weight:700;}
p{margin:0 0 1em;}
ul,ol{margin:0 0 1em;padding-left:1.4em;}

/* ---------- Wrap / Skip link ---------- */
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px;}
.skip-link{position:absolute;left:-999px;top:0;background:var(--green-700);color:#fff;padding:10px 16px;z-index:999;border-radius:0 0 8px 0;}
.skip-link:focus{left:0;}

/* ---------- Topbar ---------- */
.topbar{background:var(--navy-950);color:var(--ice-200);font-size:13px;}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center;min-height:36px;gap:12px;flex-wrap:nowrap;overflow:hidden;white-space:nowrap;}
.topbar span{opacity:.88;overflow:hidden;text-overflow:ellipsis;}
.topbar .topbar-tag{color:var(--green-400);letter-spacing:.04em;font-weight:600;flex:none;opacity:1;}
@media (max-width:640px){
  .topbar .wrap>span:not(.topbar-tag){display:none;}
}

/* ---------- Header / Nav ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:var(--navy-900);
  border-bottom:1px solid rgba(255,255,255,.07);
}
.site-header .wrap,.topbar .wrap{max-width:1360px;}
.header-row{display:flex;align-items:center;justify-content:space-between;height:64px;gap:14px;}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;font-size:18px;flex:0 0 auto;line-height:1.2;}
.brand:hover{text-decoration:none;}
.brand .logo-mark{width:32px;height:32px;flex:none;}
.brand small{display:block;font-size:10.5px;font-weight:500;color:var(--green-400);letter-spacing:.06em;}

.main-nav{display:flex;align-items:center;gap:0;flex:1 1 auto;justify-content:center;min-width:0;}
.main-nav a{
  color:var(--ice-100);
  font-size:13px;
  font-weight:500;
  padding:8px 7px;
  border-radius:8px;
  white-space:nowrap;
}
.main-nav a:hover,.main-nav a:focus-visible{background:rgba(255,255,255,.09);text-decoration:none;}
.main-nav a[aria-current="page"]{color:#fff;background:rgba(44,184,100,.26);}

.header-actions{display:flex;align-items:center;gap:10px;flex:0 0 auto;}
.nav-toggle{
  display:none;background:transparent;border:1px solid rgba(255,255,255,.3);
  border-radius:8px;width:40px;height:40px;flex:none;cursor:pointer;position:relative;
}
.nav-toggle span,.nav-toggle::before,.nav-toggle::after{
  content:"";position:absolute;left:9px;right:9px;height:2px;background:#fff;border-radius:2px;
}
.nav-toggle span{top:19px;}
.nav-toggle::before{top:13px;}
.nav-toggle::after{top:25px;}

@media (max-width:1260px){
  .main-nav{
    position:absolute;left:0;right:0;top:64px;
    flex-direction:column;align-items:stretch;gap:0;
    background:var(--navy-900);
    border-top:1px solid rgba(255,255,255,.08);
    max-height:0;overflow:hidden;
    transition:max-height .25s ease;
  }
  .site-header.is-open .main-nav{max-height:620px;}
  .main-nav a{padding:14px 20px;border-radius:0;border-bottom:1px solid rgba(255,255,255,.06);font-size:14.5px;}
  .header-actions{margin-left:auto;}
  .nav-toggle{display:block;}
}
@media (min-width:1261px) and (max-width:1420px){
  .header-actions{display:none;}
}
@media (max-width:520px){
  .header-actions .btn{display:none;}
}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:9px 18px;border-radius:999px;font-size:14px;font-weight:600;
  border:1px solid transparent;cursor:pointer;white-space:nowrap;font-family:var(--font);
}
.btn:hover{text-decoration:none;}
.btn-primary{background:linear-gradient(135deg,var(--green-700),#0f8f8a);color:#fff;}
.btn-primary:hover{filter:brightness(1.1);}
.btn-ghost{background:transparent;color:var(--ice-100);border-color:rgba(255,255,255,.3);}
.btn-ghost:hover{background:rgba(255,255,255,.09);}
.btn-outline{background:transparent;color:var(--green-700);border-color:var(--green-700);}
.btn-outline:hover{background:var(--ice-50);}
.btn-sm{padding:8px 16px;font-size:13.5px;}
.btn-lg{padding:13px 26px;font-size:15.5px;}

/* ---------- Breadcrumb ---------- */
.breadcrumb{font-size:13.5px;color:var(--text-500);padding:16px 0;}
.breadcrumb a{color:var(--text-500);}
.breadcrumb a:hover{color:var(--green-700);}
.breadcrumb .sep{margin:0 6px;color:var(--text-400);}
.breadcrumb .current{color:var(--text-700);}

/* ---------- Hero ---------- */
.hero{
  background:
    radial-gradient(1100px 520px at 84% -12%,rgba(34,211,238,.20),transparent 60%),
    radial-gradient(900px 520px at -8% 12%,rgba(44,184,100,.26),transparent 56%),
    linear-gradient(160deg,var(--navy-950),var(--navy-900) 58%,var(--navy-800));
  color:var(--ice-100);
  padding:56px 0 64px;
}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-size:12.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;
  color:var(--green-400);margin-bottom:14px;
}
.hero h1{color:#fff;font-size:clamp(27px,3.8vw,42px);margin-bottom:18px;line-height:1.3;}
.hero h1 em{font-style:normal;color:var(--cyan-300);}
.hero p.lead{font-size:16.5px;color:var(--ice-200);max-width:600px;line-height:1.85;}
.hero-actions{display:flex;gap:12px;margin-top:26px;flex-wrap:wrap;}
.hero-panel{
  background:rgba(255,255,255,.055);
  border:1px solid rgba(255,255,255,.15);
  border-radius:var(--radius-lg);
  padding:26px;
}
.hero-panel .quote{font-size:16px;color:#fff;font-weight:600;margin-bottom:10px;line-height:1.7;}
.hero-panel p{color:var(--ice-200);font-size:14.5px;}
.hero-flow{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px;}
.hero-flow span{
  font-size:13px;padding:7px 12px;border-radius:999px;
  background:rgba(255,255,255,.075);color:var(--ice-100);border:1px solid rgba(255,255,255,.14);
}
.hero-tagline{font-size:18px;font-weight:600;color:var(--cyan-300);margin:-6px 0 14px;line-height:1.6;}
.hero-art{margin:0 0 16px;}
.hero-art img{width:100%;max-height:300px;object-fit:contain;margin:0 auto;}
.hero-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:36px;}
.hero-strip div{
  background:rgba(255,255,255,.045);border:1px solid rgba(255,255,255,.11);
  border-radius:var(--radius-md);padding:14px 16px;
}
.hero-strip b{display:block;color:var(--green-400);font-size:12.5px;margin-bottom:4px;}
.hero-strip span{color:var(--ice-100);font-size:13.5px;}
.hero-topic{padding:44px 0 50px;}
.hero-topic .hero-grid{grid-template-columns:1.2fr .8fr;}
.hero-topic .hero-art img{width:100%;max-width:440px;margin-left:auto;border-radius:var(--radius-md);border:1px solid rgba(255,255,255,.14);}
.hero-topic .hero-art figcaption{font-size:12.5px;color:var(--ice-200);text-align:right;margin-top:8px;opacity:.85;}

/* ---------- Section scaffolding ---------- */
.section{padding:60px 0;}
.section-tight{padding:40px 0;}
.section-alt{background:var(--ice-50);}
.section-dark{background:var(--navy-900);color:var(--ice-100);}
.section-dark h2,.section-dark h3{color:#fff;}
.section-head{max-width:760px;margin:0 0 32px;}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center;}
.section-head h2{font-size:clamp(22px,3vw,30px);}
.section-head p{color:var(--text-500);font-size:15.5px;}
.section-dark .section-head p{color:var(--ice-200);}
.section-kicker{font-size:12.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--green-700);margin-bottom:10px;display:block;}
.section-dark .section-kicker{color:var(--green-400);}
.is-filtered-empty{display:none!important;}

/* ---------- Filter bar (站内文章筛选) ---------- */
.filter-bar{background:var(--ice-100);border-bottom:1px solid var(--line);padding:14px 0;}
.filter-bar .wrap{display:flex;gap:14px;align-items:center;flex-wrap:wrap;}
.filter-bar label{font-size:13.5px;font-weight:600;color:var(--text-700);}
.filter-bar input{flex:1 1 260px;max-width:520px;padding:10px 16px;border:1px solid var(--line);border-radius:999px;font-size:14.5px;font-family:var(--font);background:#fff;color:var(--text-900);}
.filter-bar .filter-hints{font-size:12.5px;color:var(--text-500);}
.filter-bar .filter-hints button{background:#fff;border:1px solid var(--line);border-radius:999px;padding:3px 10px;margin-left:6px;font-size:12.5px;cursor:pointer;color:var(--green-700);font-family:var(--font);}
.filter-empty{display:none;text-align:center;padding:40px 0;color:var(--text-500);}
.filter-empty.show{display:block;}

/* ---------- Grids & Cards ---------- */
.grid{display:grid;gap:22px;}
.grid-2{grid-template-columns:repeat(2,1fr);}
.grid-3{grid-template-columns:repeat(3,1fr);}
.grid-4{grid-template-columns:repeat(4,1fr);}
@media (max-width:980px){.grid-3,.grid-4{grid-template-columns:repeat(2,1fr);}}
@media (max-width:640px){.grid-2,.grid-3,.grid-4{grid-template-columns:1fr;}}

.card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);
  padding:22px;box-shadow:var(--shadow-card);
}
.card h3{font-size:17px;}
.card p{font-size:14.5px;color:var(--text-500);margin-bottom:.6em;}

/* ---------- Article cards ---------- */
.article-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);
  overflow:hidden;box-shadow:var(--shadow-card);display:flex;flex-direction:column;height:100%;
}
.article-card .thumb{display:block;aspect-ratio:16/9;background:#eaf6ef;overflow:hidden;}
.article-card .thumb img{width:100%;height:100%;object-fit:cover;}
.article-card .body{padding:18px 20px 20px;display:flex;flex-direction:column;flex:1;}
.article-card .meta-row{font-size:12.5px;color:var(--text-500);display:flex;gap:10px;flex-wrap:wrap;margin-bottom:8px;align-items:center;}
.article-card .meta-row span:first-child{color:var(--green-700);font-weight:700;}
.article-card .meta-row span+span::before{content:"·";margin-right:10px;color:var(--text-400);}
.article-card h3{font-size:17px;margin-bottom:8px;line-height:1.5;}
.article-card h3 a{color:var(--text-900);}
.article-card h3 a:hover{color:var(--green-700);text-decoration:none;}
.article-card p.excerpt{font-size:14px;color:var(--text-500);flex:1;line-height:1.85;text-align:justify;}
.tag-row{display:flex;flex-wrap:wrap;gap:6px;margin:10px 0;}
.tag{
  font-size:12px;color:var(--green-700);background:var(--ice-100);
  padding:3px 10px;border-radius:999px;font-weight:600;
}
.read-more{font-size:13.5px;font-weight:700;color:var(--green-700);display:inline-flex;align-items:center;gap:4px;margin-top:auto;}
.read-more:hover{text-decoration:none;gap:8px;transition:gap .15s;}

.article-card.featured{flex-direction:row;align-items:stretch;}
.article-card.featured .thumb{width:36%;aspect-ratio:auto;flex:none;position:relative;}
.article-card.featured .thumb img{position:absolute;inset:0;width:100%;height:100%;object-fit:contain;}
.article-card.featured .body{width:64%;padding:24px 28px 24px;}
.article-card.featured h3{font-size:21px;}
.article-card.featured p.excerpt{font-size:14.5px;}
.stack{display:flex;flex-direction:column;gap:24px;}
@media (max-width:860px){
  .article-card.featured{flex-direction:column;}
  .article-card.featured .thumb{width:100%;aspect-ratio:16/9;}
  .article-card.featured .body{width:100%;padding:18px 20px 20px;}
  .article-card.featured h3{font-size:18px;}
}

/* ---------- Overview / chain ---------- */
.chain{display:flex;flex-wrap:wrap;gap:10px;align-items:stretch;margin:26px 0 8px;padding:0;list-style:none;counter-reset:chain;}
.chain li{
  flex:1 1 150px;min-width:140px;position:relative;counter-increment:chain;
  background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.14);
  border-radius:var(--radius-md);padding:14px 16px 14px 44px;margin:0;
}
.chain li::before{
  content:counter(chain);position:absolute;left:12px;top:14px;width:22px;height:22px;border-radius:50%;
  background:linear-gradient(135deg,var(--green-500),var(--cyan-400));color:var(--navy-950);
  font-size:12px;font-weight:800;display:flex;align-items:center;justify-content:center;
}
.chain b{display:block;color:#fff;font-size:13px;line-height:1.35;}
.chain span{color:var(--green-400);font-size:12.5px;}
.light .chain li,.section:not(.section-dark) .chain li{background:#fff;border-color:var(--line);}
.section:not(.section-dark) .chain b{color:var(--text-900);}
.section:not(.section-dark) .chain span{color:var(--green-700);}

.theme-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:28px;}
@media (max-width:980px){.theme-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:560px){.theme-grid{grid-template-columns:1fr;}}
.theme-card{background:var(--ice-50);border:1px solid var(--line);border-radius:var(--radius-md);padding:20px;}
.theme-card h3{font-size:16px;margin-bottom:8px;}
.theme-card h3 a{color:var(--text-900);}
.theme-card p{font-size:13.8px;color:var(--text-500);margin-bottom:.5em;}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:34px;align-items:start;}
@media (max-width:860px){.two-col{grid-template-columns:1fr;gap:10px;}}

/* ---------- Concepts (概念速查) ---------- */
.concept-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 22px;}
@media (max-width:860px){.concept-grid{grid-template-columns:1fr;}}
.concept{background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:16px 18px;}
.concept h3{font-size:15px;margin-bottom:6px;color:var(--text-900);}
.concept p{font-size:14px;color:var(--text-500);margin:0;line-height:1.8;}
.concept a{font-weight:600;}

/* ---------- Observation notes / ecommerce / about ---------- */
.note-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius-md);padding:22px;box-shadow:var(--shadow-card);display:flex;flex-direction:column;height:100%;}
.note-card .meta-row{font-size:12.5px;color:var(--text-500);margin-bottom:8px;display:flex;gap:10px;}
.note-card .meta-row span:first-child{color:var(--green-700);font-weight:700;}
.note-card h3{font-size:16.5px;line-height:1.55;}
.note-card p{font-size:14px;color:var(--text-500);line-height:1.85;text-align:justify;}
.note-card h3 a{color:var(--text-900);}
.note-card h3 a:hover{color:var(--green-700);text-decoration:none;}
.note-card .read-more{margin-top:auto;}
.ecom-grid{display:grid;grid-template-columns:1.25fr .75fr;gap:36px;align-items:start;}
@media (max-width:900px){.ecom-grid{grid-template-columns:1fr;}}
.ecom-panel{background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.15);border-radius:var(--radius-lg);padding:24px;}
.ecom-panel h3{font-size:15px;color:#fff;margin-bottom:12px;}
.chip-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px;}
.chip{font-size:12.5px;padding:6px 12px;border-radius:999px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.16);color:var(--ice-100);}
.chip.out{background:linear-gradient(135deg,var(--green-500),var(--cyan-400));color:var(--navy-950);font-weight:700;border-color:transparent;}
.section-dark .ecom-grid p{color:var(--ice-200);}
.about-grid{display:grid;grid-template-columns:1.4fr .6fr;gap:36px;align-items:start;}
@media (max-width:900px){.about-grid{grid-template-columns:1fr;}}
.company-card{background:var(--ice-50);border:1px solid var(--line);border-radius:var(--radius-md);padding:22px;}
.company-card h3{font-size:15.5px;margin-bottom:12px;}
.company-card dl{margin:0;font-size:14px;}
.company-card dt{color:var(--text-400);font-size:12.5px;margin-top:10px;}
.company-card dd{margin:2px 0 0;color:var(--text-900);font-weight:600;}

/* ---------- Topic page bits ---------- */
.step-flow{display:grid;grid-template-columns:repeat(6,1fr);gap:12px;margin:0;padding:0;list-style:none;counter-reset:step;}
@media (max-width:1100px){.step-flow{grid-template-columns:repeat(3,1fr);}}
@media (max-width:640px){.step-flow{grid-template-columns:1fr;}}
.step-flow li{position:relative;counter-increment:step;background:rgba(255,255,255,.055);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius-md);padding:16px 14px 14px;margin:0;}
.step-flow li::before{content:counter(step);display:flex;width:26px;height:26px;border-radius:50%;background:linear-gradient(135deg,var(--green-500),var(--cyan-400));color:var(--navy-950);font-weight:800;font-size:13px;align-items:center;justify-content:center;margin-bottom:10px;}
.step-flow b{display:block;color:#fff;font-size:14.5px;margin-bottom:6px;}
.step-flow span{color:var(--ice-200);font-size:13px;line-height:1.7;display:block;}
.flow-caption{font-size:13px;color:var(--ice-200);margin-top:14px;opacity:.9;}

/* ---------- FAQ ---------- */
.faq{border-top:1px solid var(--line);}
.faq-item{border-bottom:1px solid var(--line);}
.faq-q{
  width:100%;text-align:left;background:none;border:none;cursor:pointer;
  padding:18px 4px;font-size:15.5px;font-weight:600;color:var(--text-900);font-family:var(--font);
  display:flex;justify-content:space-between;align-items:center;gap:16px;
}
.faq-q::after{content:"+";font-size:22px;color:var(--green-700);flex:none;transition:transform .2s;}
.faq-item.open .faq-q::after{transform:rotate(45deg);}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease;font-size:14.8px;color:var(--text-500);}
.faq-item.open .faq-a{max-height:900px;}
.faq-a-inner{padding:0 4px 18px;line-height:1.85;}

/* ---------- CTA band ---------- */
.cta-band{
  background:linear-gradient(120deg,var(--navy-950),var(--navy-700));
  border-radius:var(--radius-lg);padding:44px;text-align:center;color:#fff;
}
.cta-band h2{color:#fff;}
.cta-band p{color:var(--ice-200);max-width:620px;margin:0 auto 22px;}
.cta-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;}

/* ---------- Footer ---------- */
.site-footer{background:var(--navy-950);color:var(--text-400);padding:52px 0 24px;}
.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:28px;padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,.09);}
.footer-brand{color:var(--ice-100);}
.footer-brand .brand{color:#fff;margin-bottom:10px;}
.footer-brand p{font-size:13.5px;color:var(--text-400);max-width:320px;}
.footer-col h5{color:var(--ice-100);font-size:13.5px;letter-spacing:.03em;margin:0 0 14px;}
.footer-col ul{list-style:none;padding:0;margin:0;}
.footer-col li{margin-bottom:9px;font-size:13.8px;}
.footer-col a{color:#a4b8ae;font-size:13.8px;}
.footer-col a:hover{color:var(--green-400);text-decoration:none;}
.footer-col li span{color:#a4b8ae;}
.footer-bottom{padding-top:20px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:12.8px;}
.footer-bottom a{color:#a4b8ae;}
@media (max-width:900px){.footer-grid{grid-template-columns:repeat(2,1fr);}}
@media (max-width:560px){.footer-grid{grid-template-columns:1fr;}}

/* ---------- Article page (Content) ---------- */
.article-layout{display:grid;grid-template-columns:minmax(0,760px) 300px;gap:48px;align-items:start;justify-content:center;}
@media (max-width:1000px){.article-layout{grid-template-columns:1fr;}}
.article-head{margin-bottom:8px;}
.article-cat{color:var(--green-700);font-weight:700;font-size:13px;letter-spacing:.04em;}
.article-head h1{font-size:clamp(24px,3.3vw,33px);margin:10px 0 16px;line-height:1.45;}
.article-lead{font-size:17px;color:var(--text-700);line-height:1.9;border-left:4px solid var(--green-500);padding:4px 0 4px 16px;margin:0 0 18px;}
.article-meta{display:flex;flex-wrap:wrap;gap:8px 18px;font-size:13.5px;color:var(--text-500);padding-bottom:20px;border-bottom:1px solid var(--line);margin-bottom:26px;align-items:center;}
.article-meta .author{display:flex;align-items:center;gap:8px;color:var(--text-700);font-weight:600;}
.article-meta .avatar{width:30px;height:30px;border-radius:8px;flex:none;}
.article-body{font-size:16.5px;color:var(--text-700);line-height:1.95;}
.article-body h2{font-size:22px;margin-top:1.9em;padding-top:.2em;}
.article-body h3{font-size:18px;margin-top:1.5em;}
.article-body p{margin-bottom:1.2em;}
.article-body ul,.article-body ol{margin-bottom:1.2em;}
.article-body li{margin-bottom:.45em;}
.article-body figure{margin:1.6em 0;}
.article-body figure img{width:100%;border-radius:var(--radius-md);border:1px solid var(--line);background:#eaf6ef;}
.article-body figcaption{font-size:13px;color:var(--text-500);margin-top:8px;text-align:center;}
.article-body a{border-bottom:1px solid rgba(18,121,63,.4);}
.article-body a:hover{text-decoration:none;border-bottom-color:var(--green-700);}
.article-body strong{color:var(--text-900);}
.article-tags{display:flex;flex-wrap:wrap;gap:8px;margin-top:34px;}
.article-note{margin-top:30px;padding:14px 18px;background:var(--ice-50);border:1px solid var(--line);border-radius:var(--radius-md);font-size:13.5px;color:var(--text-500);line-height:1.85;}
.refs{margin-top:34px;}
.refs h2{font-size:18px;margin-bottom:12px;}
.refs ol{padding-left:1.3em;font-size:14px;color:var(--text-500);}
.refs li{margin-bottom:.55em;line-height:1.7;}
.refs a{word-break:break-word;}
.prev-next{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:34px;}
@media (max-width:640px){.prev-next{grid-template-columns:1fr;}}
.prev-next a{display:block;padding:14px 16px;border:1px solid var(--line);border-radius:var(--radius-md);background:#fff;color:var(--text-900);font-size:14px;line-height:1.6;}
.prev-next a small{display:block;color:var(--green-700);font-weight:700;font-size:12px;margin-bottom:4px;}
.prev-next a:hover{border-color:var(--green-600);text-decoration:none;}
.prev-next .next{text-align:right;}
.back-topic{margin-top:22px;}

.sidebar-box{background:var(--ice-50);border:1px solid var(--line);border-radius:var(--radius-md);padding:20px;margin-bottom:20px;}
.sidebar-box h4{font-size:14.5px;margin-bottom:12px;}
.sidebar-box .author-mini{display:flex;gap:12px;align-items:center;margin-bottom:10px;}
.sidebar-box .author-mini img{width:48px;height:48px;border-radius:12px;flex:none;}
.sidebar-box .author-mini b{color:var(--text-900);font-size:14.5px;}
.sidebar-box .mini-card{display:flex;gap:10px;margin-bottom:14px;}
.sidebar-box .mini-card:last-of-type{margin-bottom:8px;}
.sidebar-box .mini-card .n{flex:none;width:26px;height:26px;border-radius:50%;background:var(--green-700);color:#fff;font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;}
.sidebar-box .mini-card a{color:var(--text-900);font-size:13.8px;font-weight:600;line-height:1.55;}
.sidebar-box .mini-card a:hover{color:var(--green-700);}
.sidebar-sticky{position:sticky;top:84px;}
@media (max-width:1000px){.sidebar-sticky{position:static;}}

.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:22px;}
@media (max-width:860px){.related-grid{grid-template-columns:1fr;}}
.related-grid .article-card h3{font-size:14.5px;}

/* ---------- Table / Callout / Flow card ---------- */
.table-wrap{overflow-x:auto;margin:1.5em 0;}
table.plain{border-collapse:collapse;width:100%;font-size:14.5px;line-height:1.7;}
table.plain th,table.plain td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top;}
table.plain th{background:var(--ice-100);font-weight:700;color:var(--text-900);white-space:nowrap;}
.callout{margin:1.6em 0;padding:16px 20px;background:var(--ice-50);border-left:4px solid var(--green-500);border-radius:0 var(--radius-md) var(--radius-md) 0;color:var(--text-700);font-size:15.5px;line-height:1.85;}
.callout p{margin:0;}
.flow-card{margin:1.8em 0;padding:18px 20px;background:var(--navy-900);border-radius:var(--radius-md);color:var(--ice-100);}
.flow-card .flow-title{font-size:13px;font-weight:700;letter-spacing:.05em;color:var(--green-400);margin-bottom:12px;}
.flow-steps{display:flex;flex-wrap:wrap;gap:8px 6px;align-items:center;}
.flow-steps .fs{background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.16);border-radius:10px;padding:8px 12px;font-size:13.5px;color:#fff;line-height:1.5;}
.flow-steps .arrow{color:var(--cyan-300);font-size:15px;}

/* ---------- Static doc pages ---------- */
.doc-page{max-width:820px;margin:0 auto;}
.doc-page h2{margin-top:1.8em;}
.text-center{text-align:center;}
.mt-0{margin-top:0;}
.badge-dot{display:inline-flex;align-items:center;gap:6px;font-size:12.5px;color:var(--success);font-weight:600;}
.badge-dot::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--success);}

/* ---------- Back to top ---------- */
.back-to-top{position:fixed;right:20px;bottom:20px;width:44px;height:44px;border-radius:50%;background:var(--green-700);color:#fff;display:none;align-items:center;justify-content:center;box-shadow:var(--shadow-pop);border:none;cursor:pointer;z-index:50;font-size:18px;}
.back-to-top.show{display:flex;}

/* ---------- Responsive fine-tuning ---------- */
@media (max-width:900px){
  .hero-grid,.hero-topic .hero-grid{grid-template-columns:1fr;}
  .hero-strip{grid-template-columns:repeat(2,1fr);}
  .hero-topic .hero-art img{margin-left:0;}
  .hero-topic .hero-art figcaption{text-align:left;}
}
@media (max-width:640px){
  .section{padding:44px 0;}
  .hero{padding:40px 0 46px;}
  .cta-band{padding:30px 20px;}
  .article-body{font-size:16px;}
}
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto;}
  .faq-a,.main-nav{transition:none;}
}