:root{
  --shell-gutter:16px;
  /* 品牌主站：唯一把品牌金当主色的站。其余各站只在标识上用金色，
     主站用足它，视觉上确立"这是总部"。底色走近黑，让金色立得住。*/
  --void:#f4f5f7;--panel:#ffffff;--panel2:#eceef1;
  --ink:#12141a;--muted:#565d69;--dim:#7b828d;
  --gold:#8a5a06;--gold2:#a8500a;--gold-deep:#6d4705;--gold-bright:#FFC53D;
  --line:rgba(18,20,26,.11);--line2:rgba(18,20,26,.2);
  --brand-1:#FFC53D;--brand-2:#F5901E;--max:1400px;
  --sans:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --num:"DIN Alternate","Helvetica Neue",Arial,sans-serif;
}
/* 锚点跳转：吸顶头部会盖住区块顶部，必须给滚动容器留出头部那么高的内边距。
   值 = 实测头部高度 + 余量；改了头部高度这里要跟着改。 */
html{scroll-behavior:smooth;scroll-padding-top:92px}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

*{box-sizing:border-box}
figure,h1,h2,h3,h4,p,ul,ol,dl,dd{margin:0}
ul,ol{list-style:none;padding:0}
body{margin:0;min-width:320px;overflow-x:clip;background:var(--void);color:var(--ink);font-family:var(--sans);
  /* 斜向金色细纹，不用径向光晕（那是其他站的手法）*/
  background-image:radial-gradient(ellipse 70% 44% at 82% 2%,rgba(255,197,61,.2),transparent 60%)}
a{color:inherit}
.page-shell{width:min(100% - var(--shell-gutter)*2,var(--max));margin-inline:auto;padding:52px 0}

.site-header{position:sticky;top:0;z-index:20;display:flex;align-items:center;justify-content:space-between;
  gap:18px;height:64px;padding:0 var(--shell-gutter);background:rgba(244,245,247,.9);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line)}
.brand-lockup{display:flex;align-items:center;gap:9px;flex:0 0 auto}
.brand-mark{width:32px;height:32px;flex:0 0 auto}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-name{font-size:17px;font-weight:700;white-space:nowrap;
  color:var(--ink)}
.brand-en{font-size:8px;letter-spacing:.24em;color:var(--dim);white-space:nowrap}
.site-nav{display:flex;gap:16px;overflow-x:auto;scrollbar-width:none}
.site-nav::-webkit-scrollbar{display:none}
.site-nav a{font-size:12.5px;color:var(--muted);text-decoration:none;white-space:nowrap;padding:5px 0;
  border-bottom:1px solid transparent}
.site-nav a:hover{color:var(--gold);border-bottom-color:var(--gold)}

/* 首屏：居中式门户，和其余各站的左对齐编辑式明显不同 */

.eyebrow{font-size:10px;letter-spacing:.32em;color:var(--gold);margin-bottom:20px}
.hero h1{font-size:clamp(42px,10vw,88px);line-height:1.04;letter-spacing:-.035em;font-weight:800;
  color:var(--ink)}
.hero-lead{margin:22px auto 0;font-size:15px;line-height:2;color:var(--muted);max-width:34em}
.hero-figures{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:1px;margin-top:40px;
  background:var(--line);border:1px solid var(--line);border-radius:10px;overflow:hidden}
.hero-figures li{padding:20px 10px;background:var(--panel)}
.hero-figures b{display:block;font-family:var(--num);font-size:clamp(26px,6vw,38px);font-weight:700;color:var(--gold)}
.hero-figures span{display:block;margin-top:6px;font-size:11.5px;color:var(--dim);letter-spacing:.06em}

/* 区块标题：编号 + 竖线，不再用"眉标 + 右侧英文角标"那套通用组件 */
.sec-head{position:relative;padding-left:20px;margin-bottom:18px}
.sec-head::before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:3px;
  background:linear-gradient(180deg,var(--gold),var(--gold2))}
.sec-cap{font-size:10px;letter-spacing:.26em;color:var(--gold);margin-bottom:10px}
.sec-head h2{font-size:clamp(22px,4.4vw,34px);line-height:1.26;letter-spacing:-.02em;font-weight:700}
.section-note{font-size:13.5px;line-height:2;color:var(--muted);max-width:56em;margin-bottom:32px}

/* 站点矩阵：6 条，2/3 列都整除 */
.site-matrix{display:grid;grid-template-columns:minmax(0,1fr);gap:12px}

/* 内容标准 */
.standard-list{border-top:1px solid var(--line)}
.st-row{display:grid;grid-template-columns:48px minmax(0,1fr);gap:16px;padding:20px 0;border-bottom:1px solid var(--line)}
.st-no{font-family:var(--num);font-size:15px;font-weight:700;color:var(--gold)}
.st-row h3{font-size:16.5px;line-height:1.4;margin-bottom:7px}
.st-row p{font-size:13px;line-height:1.95;color:var(--muted);max-width:52em}

.intro-lead{font-size:14.5px;line-height:2.05;color:var(--muted);max-width:56em;margin-bottom:28px}
.genre-compare{display:grid;grid-template-columns:minmax(0,1fr);border-top:1px solid var(--line)}
.genre-compare>div{display:grid;grid-template-columns:minmax(0,7em) minmax(0,1fr);gap:16px;
  padding:15px 0;border-bottom:1px solid var(--line);align-items:baseline}
.genre-compare dt{font-size:14px;font-weight:600;color:var(--gold)}
.genre-compare dd{font-size:13px;line-height:1.9;color:var(--muted)}
.ency-sub{margin:36px 0 16px}
.ency-sub h3{font-size:17px;font-weight:600}
.glossary-list{display:grid;grid-template-columns:minmax(0,1fr);border-top:1px solid var(--line)}
.glossary-list li{padding:15px 0;border-bottom:1px solid var(--line);min-width:0}
.glossary-list h4{font-size:14px;margin-bottom:5px;color:var(--gold)}
.glossary-list p{font-size:12.5px;line-height:1.85;color:var(--muted)}

.faq-list,.lt-grid{display:grid;grid-template-columns:minmax(0,1fr);border-top:1px solid var(--line)}
.faq-item,.lt-item{padding:20px 0;border-bottom:1px solid var(--line);min-width:0}
.faq-item h3{font-size:15.5px;margin-bottom:9px}
.faq-item p{font-size:13px;line-height:2;color:var(--muted)}
.lt-item h3{font-size:13.5px;margin-bottom:5px}
.lt-item p{font-size:12px;line-height:1.85;color:var(--muted)}

.brand-about{display:grid;grid-template-columns:minmax(0,1fr);gap:30px;margin-bottom:36px}
.ba-tagline{color:var(--gold);font-size:20px;line-height:1.5;margin-bottom:16px}
.ba-body{color:var(--muted);font-size:14px;line-height:2.05;max-width:44em}
.ba-body+.ba-body{margin-top:13px}
.ba-queries{display:grid;grid-template-columns:minmax(0,1fr);border-top:1px solid var(--line)}
.ba-queries>div{padding:13px 2px;border-bottom:1px solid var(--line);min-width:0}
.ba-queries dt{font-size:14px;font-weight:600}
.ba-queries dd{margin-top:5px;font-size:12px;line-height:1.8;color:var(--muted)}
.about-grid{display:grid;grid-template-columns:minmax(0,1fr);gap:28px}
.about-main p{font-size:13.5px;line-height:2.05;color:var(--muted)}
.about-main p+p{margin-top:13px}
.about-facts{display:grid;grid-template-columns:minmax(0,1fr);border-top:1px solid var(--line)}
.about-facts>div{display:grid;grid-template-columns:minmax(0,6em) minmax(0,1fr);gap:14px;
  padding:13px 0;border-bottom:1px solid var(--line);align-items:baseline}
.about-facts dt{font-size:12.5px;color:var(--gold)}
.about-facts dd{font-size:12.5px;line-height:1.75;color:var(--muted)}
.about-facts a{color:var(--gold);text-decoration:underline;text-underline-offset:3px}

.tg-float{position:fixed;right:16px;bottom:16px;z-index:60;display:inline-flex;align-items:center;gap:8px;
  padding:11px 16px;border-radius:999px;text-decoration:none;font-size:13.5px;font-weight:700;
  color:#12141a;background:linear-gradient(120deg,var(--gold-bright),#F5901E);
  box-shadow:0 8px 24px rgba(245,144,30,.4);transition:transform .25s ease,box-shadow .25s ease}
.tg-float:hover{transform:translateY(-2px);box-shadow:0 14px 36px rgba(245,144,30,.48)}
.tg-float svg{width:17px;height:17px;flex:0 0 auto}

.site-footer{border-top:1px solid var(--line2);margin-top:36px;background:var(--panel2)}
.footer-inner,.footer-bottom{width:min(100% - var(--shell-gutter)*2,var(--max));margin-inline:auto}
.footer-inner{display:grid;grid-template-columns:minmax(0,1fr);gap:30px;padding:48px 0 32px}
.footer-brand .brand-lockup{margin-bottom:12px}
.footer-brand strong{font-size:15px;color:var(--gold)}
.footer-brand p{font-size:12.5px;line-height:1.9;color:var(--muted)}
.footer-desc{margin-top:9px;color:var(--dim)!important;font-size:12px!important}
.footer-heading{font-size:10px;letter-spacing:.2em;color:var(--gold);margin-bottom:12px}
.footer-nav li{margin-bottom:8px}
.footer-nav a{font-size:12.5px;color:var(--muted);text-decoration:none}
.footer-nav a:hover{color:var(--gold)}
.footer-meta p{font-size:12px;line-height:1.9;color:var(--muted)}
.footer-bottom{padding:16px 0 30px;border-top:1px solid var(--line)}
.footer-bottom p{font-size:11.5px;color:var(--dim)}

@media (min-width:720px){
  :root{--shell-gutter:32px}
  .page-shell{padding:56px 0}
  .site-header{height:76px}
  .hero{padding:80px 0 64px}
  .site-matrix{grid-template-columns:repeat(2,minmax(0,1fr));gap:14px}
  .genre-compare,.glossary-list,.lt-grid{grid-template-columns:repeat(2,minmax(0,1fr));column-gap:36px}
  .ba-queries{grid-template-columns:repeat(2,minmax(0,1fr));column-gap:24px}
  .about-grid{grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:40px}
  .footer-inner{grid-template-columns:minmax(0,1.4fr) minmax(0,.8fr) minmax(0,1.1fr);gap:40px}
}
@media (min-width:1120px){
  :root{--shell-gutter:56px}
  .page-shell{padding:64px 0}
  .hero{padding:96px 0 76px}
  .site-matrix{grid-template-columns:repeat(3,minmax(0,1fr));gap:16px}
  .glossary-list{grid-template-columns:repeat(3,minmax(0,1fr))}
  .brand-about{grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:52px;align-items:start}
  .faq-item{display:grid;grid-template-columns:minmax(0,20em) minmax(0,1fr);gap:0 40px;align-items:baseline}
  .faq-item h3{margin-bottom:0}
}
@media (max-width:719px){.tg-float span{display:none}.tg-float{padding:13px;right:14px;bottom:14px}}
@media (prefers-reduced-motion:reduce){.sm-card,.tg-float{transition:none}}


/* 侧栏版式只在宽屏成立；窄屏回到单列，导航横向滚动 */
@media (max-width:1119px){
  .rail{display:block;padding:16px 0 4px;border-bottom:1px solid var(--line);margin-bottom:8px}
  .rail-cap,.rail-note{display:none}
  .site-nav{flex-direction:row;gap:6px;overflow-x:auto;scrollbar-width:none}
  .site-nav::-webkit-scrollbar{display:none}
  .site-nav a{white-space:nowrap;padding:7px 12px;border-left:0;border:1px solid var(--line)}
}
@media (min-width:1120px){
  .shell{display:grid;grid-template-columns:190px minmax(0,1fr);gap:0 52px;align-items:start}
  .rail{display:block;position:sticky;top:100px;padding-bottom:40px}
  .site-matrix{grid-template-columns:repeat(2,minmax(0,1fr))}
  .glossary-list{grid-template-columns:repeat(2,minmax(0,1fr))}
  .faq-item{grid-template-columns:minmax(0,17em) minmax(0,1fr)}
}


/* ── 首屏：左文右图拼贴 ───────────────────────────────────────── */
.hero{padding:56px 0 44px}
.hero-copy{text-align:center}
.hero-mosaic{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:8px;margin-top:38px}
.hero-mosaic figure{margin:0;border-radius:8px;overflow:hidden;border:1px solid var(--line);
  box-shadow:0 10px 28px rgba(18,20,26,.16)}
.hero-mosaic img{display:block;width:100%;height:auto;aspect-ratio:2/3;object-fit:cover}
.hm-1,.hm-4{transform:translateY(14px)}
.hm-3,.hm-6{transform:translateY(-10px)}

/* ── 站点卡：封面占大块，文字压在下半，真正的图文卡 ───────────── */
.site-matrix{display:grid;grid-template-columns:minmax(0,1fr);gap:16px}
.sm-card{position:relative;min-width:0;border-radius:12px;overflow:hidden;
  border:1px solid var(--line);background:var(--panel);
  box-shadow:0 1px 2px rgba(18,20,26,.05),0 8px 24px rgba(18,20,26,.07);
  transition:transform .3s ease,box-shadow .3s ease}
.sm-card:hover{transform:translateY(-3px);box-shadow:0 2px 4px rgba(18,20,26,.07),0 16px 40px rgba(18,20,26,.13)}
.sm-cover{position:relative;margin:0;aspect-ratio:16/10;overflow:hidden}
.sm-cover img{display:block;width:100%;height:100%;object-fit:cover;object-position:center 22%;
  filter:saturate(1.05)}
.sm-cover::after{content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,12,16,.05) 0,rgba(10,12,16,.62) 58%,rgba(10,12,16,.86) 100%)}
.sm-cover figcaption{position:absolute;left:16px;bottom:11px;z-index:1;font-size:11px;
  color:rgba(255,255,255,.9);letter-spacing:.03em}
.sm-no{position:absolute;right:12px;top:10px;z-index:1;font-family:var(--num);font-size:12px;
  font-weight:700;color:#12141a;letter-spacing:.08em;background:var(--gold-bright);
  padding:3px 8px;border-radius:999px}
.sm-body{padding:16px 18px 20px}
.sm-card h3{font-size:19px;line-height:1.3;color:var(--ink)}
.sm-genre{margin-top:7px;font-size:11.5px;letter-spacing:.04em;color:var(--muted)}
.sm-scale{display:inline-block;margin-top:11px;padding:4px 9px;border-radius:999px;font-family:var(--num);
  font-size:11px;font-weight:700;color:#12141a;background:var(--gold-bright)}
.sm-body>p:last-child{margin-top:12px;font-size:12.5px;line-height:1.9;color:var(--muted)}

@media (min-width:720px){
  .hero{padding:72px 0 56px}
  .hero-mosaic{gap:10px;margin-top:44px}
  .site-matrix{grid-template-columns:repeat(2,minmax(0,1fr))}
}
@media (min-width:1120px){
  .hero{display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);gap:56px;
    align-items:center;padding:88px 0 68px}
  .hero-copy{text-align:left}
  .hero-mosaic{margin-top:0;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
  .site-matrix{grid-template-columns:repeat(3,minmax(0,1fr))}
}