/* ============================================
   晟金局 · 设计系统 Design System
   暮色长安 Dusk Chang'an · 移动优先
   ============================================ */

/* ===== 本地 webfont（思源宋体 + Cormorant，按 unicode-range 分片按需加载）===== */
@import url("fonts/noto-serif-sc.css");
@import url("fonts/cormorant.css");

/* ===== Design Token ===== */
:root{
  --gold-100:#E8DDC7; --gold-300:#C7B188; --gold-400:#B79A72;
  --gold-500:#A8855A; --gold-600:#8C6E48; --gold-700:#6F573A;
  --ink-950:#14110D;  --ink-900:#1F1B16;  --ink-800:#2C2620;
  --ink-700:#3D352C;  --ink-600:#50463A;
  --ivory:#ECE6D8;    --ochre:#7D4838;    --smoke:#6B7373;
  --text-primary:#ECE6D8; --text-secondary:#B0A795; --text-tertiary:#857E6E;
  --font-serif:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  --font-sans:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --font-latin:"Cormorant Garamond","Playfair Display",serif;
  --radius-sm:2px; --radius-md:4px; --radius-full:9999px;
  --ease:cubic-bezier(0.4,0,0.2,1);

  /* 语义 surface token —— 默认指向暮色长安暗调 */
  --surface:var(--ink-900);
  --surface-raised:var(--ink-800);
  --surface-sunken:var(--ink-950);
  --border:var(--ink-600);
  --border-subtle:var(--ink-700);
  --fg:var(--text-primary);
  --fg-strong:var(--ivory);
  --fg-muted:var(--text-secondary);
  --fg-subtle:var(--text-tertiary);
  --accent:var(--gold-500);
  --accent-soft:var(--gold-400);
  --accent-line:rgba(168,133,90,.5);
  --accent-glow:rgba(168,133,90,.14);

  /* 暮霭初晓 Dawn —— 亮色 surface 色阶（A 案） */
  --dawn-bg:#ECE6D8;        /* 素缟底 */
  --dawn-card:#F5F1E7;      /* 卡面 */
  --dawn-sunken:#E1D9C7;    /* 沉底 / 交替区 */
  --dawn-line:#CFC5AC;      /* 分隔线 */
  --dawn-line-soft:#DED5BE; /* 次级分隔线 */
  --dawn-ink:#1F1B16;       /* 正文墨色 */
  --dawn-sub:#5F594C;       /* 次级正文 */
  --dawn-sub-soft:#675F52;  /* 辅助说明 */
  --dawn-primary:#6F5326;   /* 主色 哑金 */
  --dawn-primary-deep:#54401D;
}

/* ===== Reset ===== */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-sans);
  background:var(--surface);
  color:var(--fg);
  line-height:1.7;font-size:16px;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
@media(min-width:768px){.container{padding:0 32px}}

/* ===== 导航 ===== */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  transition:background .3s var(--ease),backdrop-filter .3s var(--ease),border-color .3s var(--ease);
  border-bottom:1px solid transparent;
}
.nav.scrolled{
  background:rgba(20,17,13,.9);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--ink-600);
}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:12px}
.logo-icon{width:40px;height:40px;display:block;flex-shrink:0}
.logo-word{font-family:var(--font-serif);font-size:19px;font-weight:600;letter-spacing:2px}
.logo-en{font-family:var(--font-latin);font-size:10px;color:var(--fg-subtle);letter-spacing:3px;text-transform:uppercase}
.nav-links{display:none;gap:32px;align-items:center}
.nav-links a{font-size:14px;color:var(--text-secondary);letter-spacing:1px;position:relative;padding:6px 0;transition:color .2s}
.nav-links a:hover{color:var(--ivory)}
.nav-links a::after{content:"";position:absolute;left:0;bottom:0;width:0;height:1px;background:var(--gold-500);transition:width .25s var(--ease)}
.nav-links a:hover::after{width:100%}
.nav-links a[aria-current="page"]{color:var(--ivory)}
.nav-links a[aria-current="page"]::after{width:100%}
.nav-cta{display:none}

/* ===== 按钮 ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  font-family:var(--font-serif);font-weight:600;letter-spacing:1px;
  padding:12px 28px;border-radius:var(--radius-full);
  cursor:pointer;border:1px solid transparent;
  transition:transform .2s var(--ease),background .2s var(--ease),border-color .2s var(--ease),opacity .2s var(--ease);
}
.btn-primary{background:var(--gold-500);color:var(--ink-950)}
.btn-primary:hover{background:var(--gold-600);transform:scale(1.02)}
.btn-primary:active{transform:scale(.98)}
.btn-ghost{background:transparent;color:var(--ivory);border-color:rgba(168,133,90,.4)}
.btn-ghost:hover{border-color:var(--gold-500);transform:scale(1.02)}
.btn-ghost:active{transform:scale(.98)}
.btn-lg{padding:16px 40px;font-size:17px}

/* 导航内 CTA：精致克制版（细金边 + 金字 + 轻量 hover） */
.nav-cta{
  font-family:var(--font-serif);font-weight:500;letter-spacing:2px;
  font-size:13px;padding:8px 18px;
  color:var(--gold-400);background:transparent;
  border:1px solid rgba(184,149,74,.45);border-radius:var(--radius-full);
  transition:color .2s var(--ease),border-color .2s var(--ease),background .2s var(--ease);
}
.nav-cta:hover{color:var(--ink-950);background:var(--gold-400);border-color:var(--gold-400)}
.nav-cta:active{background:var(--gold-500);border-color:var(--gold-500)}

/* ===== 汉堡 / 抽屉 ===== */
.hamburger{display:flex;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.hamburger span{width:22px;height:1.5px;background:var(--ivory);transition:transform .25s var(--ease),opacity .25s var(--ease)}
.hamburger.open span:nth-child(1){transform:translateY(6.5px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-6.5px) rotate(-45deg)}
.drawer{
  position:fixed;top:64px;left:0;right:0;bottom:0;z-index:99;
  background:var(--ink-950);
  display:flex;flex-direction:column;padding:32px 20px;
  transform:translateY(-8px);opacity:0;visibility:hidden;
  transition:opacity .25s var(--ease),transform .25s var(--ease),visibility .25s;
}
.drawer.open{transform:translateY(0);opacity:1;visibility:visible}
.drawer a{font-family:var(--font-serif);font-size:20px;padding:16px 0;border-bottom:1px solid var(--ink-700);color:var(--text-secondary)}
.drawer a:hover{color:var(--ivory)}
@media(min-width:768px){
  .nav-links{display:flex}
  .nav-cta{display:inline-flex}
  .hamburger{display:none}
}

/* ===== Hero ===== */
.hero{
  min-height:100svh;position:relative;
  display:flex;align-items:center;justify-content:center;text-align:center;
  padding:120px 20px 80px;overflow:hidden;
  background:
    radial-gradient(ellipse 60% 45% at 50% 38%, rgba(168,133,90,.14), transparent 60%),
    radial-gradient(ellipse 80% 60% at 50% 110%, rgba(125,72,56,.08), transparent 55%),
    var(--ink-900);
}
.hero::before{
  content:"";position:absolute;inset:0;opacity:.3;pointer-events:none;
  background-image:linear-gradient(rgba(168,133,90,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(168,133,90,.05) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 70% 60% at 50% 45%,#000 30%,transparent 75%);
}
/* ===== 导航 / 页脚 logo 组合：主字标 + 朱红印章 =====
   严格按 logo 原图比例：印章/主字标 高度比 0.402，宽度比 0.082；
   印章顶距主字标顶 13.9%；水平间隙 3.1%（主字标高 32px 时：印章 13px / 顶移 4.5px / 间隙 2.5px） */
.logo-mark{
  display:flex;align-items:flex-start;flex-shrink:0;
  gap:2.5px;
}
.logo-mark .logo-main{height:32px;width:auto;object-fit:contain}
.logo-mark .logo-stamp{
  height:13px;width:auto;margin-top:4.5px;object-fit:contain;
  filter:drop-shadow(0 0 4px rgba(217,58,43,.4));
}
@keyframes stampPulse{
  0%,92%,100%{filter:drop-shadow(0 0 4px rgba(217,58,43,.4))}
  96%{filter:drop-shadow(0 0 10px rgba(217,58,43,.75))}
}
.logo-mark .logo-stamp{animation:stampPulse 3.5s var(--ease) infinite}

/* Hero 区 logo：按 logo 原图精确几何排版
   原图测量：印章/主字标 宽 8.2% / 高 40.2%；
   印章顶距主字标顶 13.9%；水平间隙 3.1% */
.hero-brand{
  display:flex;align-items:flex-start;justify-content:center;gap:clamp(7px,1.7vw,9px);
  margin:0 auto 36px;
  animation:fadeUp .8s .05s var(--ease) both;
}
/* 方案二 · 背光聚束（当前停用——方案一纯净黑金启用中）
   切回方案二：删除下一行 display:none 即恢复 logo 背光 */
.hero-brand-main{position:relative;display:inline-block;z-index:0}
.hero-brand-main::before{
  content:"";position:absolute;left:50%;top:46%;transform:translate(-50%,-50%);
  width:175%;height:460px;border-radius:50%;
  background:radial-gradient(ellipse closest-side, rgba(184,149,74,.20), rgba(184,149,74,.06) 58%, transparent 76%);
  pointer-events:none;z-index:-1;display:none;
}
.hero-brand-main img{
  display:block;height:auto;
  width:clamp(220px,55vw,300px);
  filter:brightness(1.1) saturate(1.08);
}
.hero-brand-stamp{display:inline-block;align-self:flex-start;margin-top:clamp(12px,3vw,16.5px)}
.hero-brand-stamp img{
  display:block;height:auto;
  width:clamp(18px,4.5vw,25px);
  filter:drop-shadow(0 0 8px rgba(217,58,43,.4));
  animation:stampPulse 3.5s var(--ease) infinite;
}

.hero-inner{position:relative;max-width:720px}
.hero-eyebrow{
  font-family:var(--font-latin);font-size:12px;letter-spacing:6px;text-transform:uppercase;
  color:var(--gold-400);margin-bottom:20px;animation:fadeUp .8s .15s var(--ease) both;
}
.hero-sub{
  font-family:var(--font-serif);color:var(--gold-400);font-weight:500;letter-spacing:3px;
  font-size:clamp(16px,3.5vw,20px);margin-bottom:32px;animation:fadeUp .8s .3s var(--ease) both;
}
.hero-lead{
  color:var(--text-secondary);font-size:15px;line-height:1.9;max-width:540px;
  margin:0 auto 48px;animation:fadeUp .8s .4s var(--ease) both;
}
.hero-actions{display:flex;flex-direction:column;gap:16px;align-items:center;animation:fadeUp .8s .5s var(--ease) both}
.hero-scroll{
  position:absolute;bottom:40px;left:50%;transform:translateX(-50%);
  color:var(--text-tertiary);font-size:12px;letter-spacing:2px;
  display:flex;flex-direction:column;align-items:center;gap:8px;
}
.hero-scroll::after{content:"";width:1px;height:40px;background:linear-gradient(var(--gold-500),transparent);animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:.3}50%{opacity:1}}
@media(min-width:768px){.hero-actions{flex-direction:row;justify-content:center}}

/* 子页 Hero（非全屏） */
.page-hero{
  position:relative;text-align:center;padding:140px 20px 64px;overflow:hidden;
  background:
    radial-gradient(ellipse 60% 50% at 50% 30%, rgba(168,133,90,.12), transparent 62%),
    var(--ink-900);
}
.page-hero::before{
  content:"";position:absolute;inset:0;opacity:.25;pointer-events:none;
  background-image:linear-gradient(rgba(168,133,90,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(168,133,90,.05) 1px,transparent 1px);
  background-size:56px 56px;
  mask-image:radial-gradient(ellipse 70% 70% at 50% 40%,#000 25%,transparent 72%);
}
.page-hero .container{position:relative}
@media(min-width:768px){.page-hero{padding:170px 32px 90px}}
.page-hero .page-title{
  font-family:var(--font-serif);font-weight:600;line-height:1.2;
  font-size:clamp(32px,7vw,52px);letter-spacing:6px;margin-bottom:18px;
  animation:fadeUp .7s var(--ease) both;
}
.page-hero .page-lead{
  color:var(--text-secondary);font-size:15px;line-height:1.9;max-width:560px;margin:0 auto;
  animation:fadeUp .7s .12s var(--ease) both;
}

/* ===== 通用区块 ===== */
section{padding:80px 0}
@media(min-width:768px){section{padding:120px 0}}
.section-alt{background:var(--surface-sunken)}
.eyebrow{
  font-family:var(--font-latin);font-size:11px;letter-spacing:5px;text-transform:uppercase;
  color:var(--accent-soft);margin-bottom:20px;
}
.h2{
  font-family:var(--font-serif);font-weight:600;line-height:1.25;
  font-size:clamp(26px,5vw,36px);letter-spacing:2px;margin-bottom:16px;
}
.lead{color:var(--fg-muted);font-size:16px;line-height:1.9;max-width:640px}
.center{text-align:center}
.center .lead{margin-left:auto;margin-right:auto}

/* ===== 布局工具类（替代内联 style，仅限布局语义） ===== */
.u-mx-auto{margin-left:auto;margin-right:auto}
.u-mb-lg{margin-bottom:48px}
.u-mb-0{margin-bottom:0}

/* ===== 阅读进度条（JS 注入，transform scaleX 动画） ===== */
.progress{
  position:fixed;top:0;left:0;right:0;height:2px;z-index:150;pointer-events:none;
}
.progress-bar{
  height:100%;width:100%;transform-origin:0 50%;transform:scaleX(0);
  background:linear-gradient(90deg,var(--gold-600),var(--gold-400),var(--gold-300));
}

/* ===== 立势 / 金句 ===== */
.manifesto{text-align:center}
.rule{width:1px;height:48px;background:linear-gradient(var(--accent),transparent);margin:0 auto 40px}
.manifesto-quote{
  font-family:var(--font-serif);font-weight:500;line-height:1.6;
  font-size:clamp(22px,4.5vw,30px);letter-spacing:2px;color:var(--fg-strong);
  max-width:720px;margin:0 auto 32px;
}
.manifesto-quote em{color:var(--accent-soft);font-style:normal}

/* ===== 产品 / 系列卡片 ===== */
.lines{display:grid;gap:24px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.line-card{
  background:var(--surface-raised);border:1px solid var(--border);border-radius:var(--radius-md);
  padding:40px 28px;position:relative;overflow:hidden;
  transition:transform .25s var(--ease),border-color .25s var(--ease);
}
.line-card:hover{transform:translateY(-4px);border-color:var(--accent-line)}
.line-card::before{content:"";position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--accent),transparent);opacity:0;transition:opacity .3s}
.line-card:hover::before{opacity:1}
.line-num{font-family:var(--font-latin);font-size:13px;letter-spacing:3px;color:var(--fg-subtle)}
.line-title{font-family:var(--font-serif);font-size:22px;font-weight:600;letter-spacing:2px;margin:16px 0 8px}
.line-en{font-family:var(--font-latin);font-size:11px;letter-spacing:3px;text-transform:uppercase;color:var(--accent-soft);margin-bottom:20px}
.line-desc{color:var(--fg-muted);font-size:14px;line-height:1.8}
.line-card.series-nanhong .line-en{color:var(--ochre)}

/* ===== 理念宫格 ===== */
.ideals{display:grid;gap:1px;background:var(--border);border:1px solid var(--border);grid-template-columns:1fr}
.ideal{background:var(--surface);padding:40px 28px;transition:background .25s var(--ease)}
.ideal:hover{background:var(--surface-raised)}
.ideal-ico{
  width:44px;height:44px;border:1px solid var(--accent);border-radius:var(--radius-sm);
  display:flex;align-items:center;justify-content:center;margin-bottom:20px;
  color:var(--accent);font-family:var(--font-serif);font-size:18px;
}
.ideal h3{font-family:var(--font-serif);font-size:18px;font-weight:600;letter-spacing:1px;margin-bottom:10px}
.ideal p{color:var(--fg-muted);font-size:14px;line-height:1.8}
@media(min-width:576px){.ideals{grid-template-columns:repeat(2,1fr)}}
@media(min-width:992px){.ideals{grid-template-columns:repeat(4,1fr)}}

/* ===== 通用 section 头 / 段首 ===== */
.section{padding:96px 0;position:relative}
.section-head{text-align:center;max-width:680px;margin:0 auto 56px}
.section-head h2{
  font-family:var(--font-serif);font-weight:500;letter-spacing:2px;
  font-size:clamp(26px,4.5vw,36px);margin:12px 0 16px;color:var(--ivory);
}
.section-head p{color:var(--fg-muted);font-size:15px;line-height:1.9;max-width:560px;margin:0 auto}
.section-head a{color:var(--accent-soft);border-bottom:1px solid var(--accent-line)}
.page-eyebrow{font-family:var(--font-latin);font-size:12px;letter-spacing:6px;text-transform:uppercase;color:var(--gold-400)}

/* ===== 品牌片卡片 + 弹层播放 ===== */
.section-film{padding:96px 0}
.film-card{
  max-width:760px;margin:0 auto;cursor:pointer;
  border:1px solid var(--ink-700);border-radius:12px;
  overflow:hidden;background:var(--ink-800);
  transition:transform .25s var(--ease),border-color .25s;
}
.film-card:hover,.film-card:focus-visible{transform:translateY(-3px);border-color:var(--gold-600)}
.film-card:focus-visible{outline:2px solid var(--gold-400);outline-offset:3px}
.film-poster{position:relative;aspect-ratio:16/9;background:var(--ink-950);overflow:hidden}
.film-poster img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .5s var(--ease)}
.film-card:hover .film-poster img{transform:scale(1.03)}
.film-play{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:60px;height:60px;border-radius:50%;
  background:rgba(217,58,43,.92);display:flex;align-items:center;justify-content:center;
  transition:transform .2s var(--ease);
}
.film-play svg{margin-left:3px}
.film-card:hover .film-play{transform:translate(-50%,-50%) scale(1.1)}
.film-dur{
  position:absolute;right:12px;bottom:12px;padding:3px 10px;border-radius:4px;
  background:rgba(13,11,8,.75);color:var(--gold-100);font-size:12px;letter-spacing:1px;
}
.film-body{padding:20px 26px 24px}
.film-title{font-family:var(--font-serif);font-size:19px;letter-spacing:1px;color:var(--ivory);margin:0 0 6px}
.film-desc{font-size:14px;line-height:1.8;color:var(--fg-muted);margin:0}
.film-more{color:var(--gold-400);margin-left:6px;white-space:nowrap}
.film-card:hover .film-more{color:var(--gold-300)}

/* 弹层 */
.film-modal{position:fixed;inset:0;z-index:120;display:flex;align-items:center;justify-content:center;padding:24px}
.film-modal[hidden]{display:none}
.film-modal-backdrop{position:absolute;inset:0;background:rgba(10,8,5,.86)}
.film-modal-box{
  position:relative;width:min(880px,100%);
  background:var(--ink-900);border:1px solid var(--ink-700);border-radius:12px;
  overflow:hidden;
}
.film-video{display:block;width:100%;aspect-ratio:16/9;background:#000}
.film-modal-meta{padding:16px 22px 18px}
.film-close{
  position:absolute;top:10px;right:10px;z-index:2;width:36px;height:36px;
  border-radius:50%;border:1px solid var(--gold-600);background:rgba(13,11,8,.72);
  color:var(--gold-100);font-size:15px;cursor:pointer;transition:background .2s;
}
.film-close:hover{background:rgba(217,58,43,.85)}
/* 视频源缺失时的占位提示（app.js 监听 video error 后加 .show） */
.film-placeholder{
  display:none;margin:0;padding:56px 24px;text-align:center;
  background:var(--ink-950);color:var(--fg-muted);
  font-size:14px;letter-spacing:2px;
}
.film-placeholder.show{display:block}

/* ===== FAQ 手风琴（语义化 details/summary，无 JS） ===== */
.faq-list{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{
  background:rgba(38,34,24,.5);border:1px solid var(--ink-700);
  border-radius:var(--radius-md);padding:20px 24px;transition:border-color .2s,background .2s;
}
.faq-item[open]{border-color:var(--gold-500);background:rgba(56,50,38,.4)}
.faq-item summary{
  cursor:pointer;font-family:var(--font-serif);font-size:17px;font-weight:500;
  color:var(--ivory);letter-spacing:.5px;list-style:none;
  display:flex;justify-content:space-between;align-items:center;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";color:var(--gold-400);font-size:22px;font-weight:400;flex-shrink:0;
  transition:transform .2s var(--ease);
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item p{margin-top:14px;color:var(--fg-muted);font-size:14px;line-height:1.9}
.faq-item p a{color:var(--accent-soft);border-bottom:1px solid var(--accent-line)}

/* ===== 媒体中心：视频卡片 ===== */
.media-grid{display:grid;gap:32px;grid-template-columns:1fr}
@media(min-width:768px){.media-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1200px){.media-grid{grid-template-columns:repeat(3,1fr)}}
.media-card{display:flex;flex-direction:column;gap:18px;background:transparent;border-radius:var(--radius-md);overflow:hidden}
.media-poster{
  position:relative;display:block;overflow:hidden;border-radius:var(--radius-md);
  border:1px solid var(--ink-700);aspect-ratio:16/9;background:var(--ink-900);
}
.media-poster img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .4s var(--ease)}
.media-card:hover .media-poster img{transform:scale(1.04)}
.play-icon{
  position:absolute;top:50%;left:50%;transform:translate(-50%,-50%);
  width:64px;height:64px;border-radius:50%;background:rgba(26,23,17,.75);
  display:flex;align-items:center;justify-content:center;
  color:var(--gold-100);font-size:22px;padding-left:6px;
  border:1px solid rgba(184,149,74,.5);
  transition:background .2s;
}
.media-card:hover .play-icon{background:rgba(184,149,74,.85);color:var(--ink-950)}
.media-duration{
  position:absolute;bottom:14px;right:14px;background:rgba(26,23,17,.85);
  padding:5px 12px;border-radius:var(--radius-sm);font-size:13px;color:var(--gold-100);
  border:1px solid rgba(184,149,74,.4);
}
.media-meta h3{font-family:var(--font-serif);font-size:20px;font-weight:600;color:var(--ivory);margin:8px 0 10px;letter-spacing:.5px}
.media-meta p{color:var(--fg-muted);font-size:14px;line-height:1.8;margin:0}
.media-eyebrow{font-family:var(--font-latin);font-size:11px;letter-spacing:3px;text-transform:uppercase;color:var(--gold-400);margin:0}

/* ===== 媒体中心：作品画廊 ===== */
.gallery-grid{display:grid;gap:24px;grid-template-columns:repeat(2,1fr)}
@media(min-width:768px){.gallery-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1200px){.gallery-grid{grid-template-columns:repeat(4,1fr)}}
.gallery-item{position:relative;border-radius:var(--radius-md);overflow:hidden;border:1px solid var(--ink-700);background:var(--ink-900);aspect-ratio:1/1}
.gallery-item img{width:100%;height:100%;object-fit:cover;display:block;transition:transform .4s var(--ease)}
.gallery-item:hover img{transform:scale(1.04)}
.gallery-item figcaption,.gallery-item .gallery-sub{
  position:absolute;left:0;right:0;text-align:center;padding:0 16px;pointer-events:none;
}
.gallery-item figcaption{
  bottom:54px;font-family:var(--font-serif);font-size:22px;font-weight:600;
  color:var(--ivory);letter-spacing:2px;text-shadow:0 1px 12px rgba(0,0,0,.7);
}
.gallery-item .gallery-sub{
  bottom:24px;color:var(--gold-300);font-size:12px;letter-spacing:3px;
  text-shadow:0 1px 8px rgba(0,0,0,.7);
}

/* ===== 品牌志：文章列表 ===== */
.journal-list{display:flex;flex-direction:column;gap:48px;max-width:780px;margin:0 auto}
.journal-card{
  padding:32px 36px;border-radius:var(--radius-md);
  background:rgba(38,34,24,.35);border:1px solid var(--ink-700);
  transition:border-color .2s,background .2s;
}
.journal-card:hover{border-color:rgba(184,149,74,.45)}
.journal-meta{display:flex;gap:18px;align-items:center;font-size:13px;color:var(--fg-subtle);margin-bottom:14px;font-family:var(--font-latin);letter-spacing:1px}
.journal-section{
  display:inline-block;padding:3px 10px;border-radius:var(--radius-full);
  background:rgba(184,149,74,.15);color:var(--gold-300);
  font-size:11px;letter-spacing:2px;
}
.journal-card h3{
  font-family:var(--font-serif);font-size:24px;font-weight:600;color:var(--ivory);
  letter-spacing:1px;line-height:1.4;margin:0 0 14px;
}
.journal-excerpt{color:var(--fg-muted);font-size:15px;line-height:1.9;margin:0 0 20px}
.journal-body summary{
  cursor:pointer;display:inline-block;color:var(--accent-soft);
  font-size:14px;letter-spacing:1px;border-bottom:1px solid var(--accent-line);
  padding-bottom:2px;
}
.journal-body[open] summary{margin-bottom:20px}
.journal-body div{margin-top:16px;padding-top:20px;border-top:1px solid var(--ink-700)}
.journal-body h4{font-family:var(--font-serif);font-size:17px;font-weight:600;color:var(--gold-300);margin:24px 0 12px;letter-spacing:1px}
.journal-body p{color:var(--fg-muted);font-size:15px;line-height:1.95;margin:0 0 14px}
.journal-body ol{padding-left:24px;color:var(--fg-muted);font-size:15px;line-height:1.95}
.journal-body ol li{margin-bottom:12px}
.journal-body ol strong{color:var(--ivory);font-weight:500}
.journal-keywords{display:flex;flex-wrap:wrap;gap:8px;margin-top:20px;padding-top:18px;border-top:1px solid var(--ink-700)}
.journal-keywords .k{
  font-size:12px;letter-spacing:1px;color:var(--gold-400);
  padding:3px 10px;border:1px solid var(--ink-700);border-radius:var(--radius-full);
}

/* ===== 无障碍：仅屏幕阅读器可见 ===== */
.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;
}

/* ===== 收尾金句 ===== */
.finale{text-align:center;position:relative;overflow:hidden}
.finale h2{
  font-family:var(--font-serif);font-weight:500;letter-spacing:3px;line-height:1.6;
  font-size:clamp(24px,5vw,34px);max-width:720px;margin:0 auto;
}
.finale h2 .gold{color:var(--accent-soft)}

/* ===== 页脚 ===== */
footer{background:var(--ink-950);border-top:1px solid var(--ink-700);padding:64px 0 32px}
.footer-grid{display:grid;gap:40px;margin-bottom:56px}
.footer-logo{display:inline-flex;margin-bottom:20px}
.footer-col h4{font-family:var(--font-serif);font-size:15px;font-weight:600;letter-spacing:2px;margin-bottom:20px;color:var(--ivory)}
.footer-col a,.footer-col p{display:block;color:var(--text-tertiary);font-size:14px;margin-bottom:12px;transition:color .2s}
.footer-col a:hover{color:var(--gold-400)}
.footer-bottom{display:flex;flex-direction:column;gap:12px;align-items:center;padding-top:32px;border-top:1px solid var(--ink-700);text-align:center}
.footer-slogan{font-family:var(--font-serif);color:var(--gold-400);letter-spacing:3px;font-size:15px}
.footer-copy{color:var(--text-tertiary);font-size:12px}
.footer-lic{color:var(--text-tertiary);font-size:11px;display:flex;align-items:center;gap:8px;flex-wrap:wrap;justify-content:center;margin:0}
.footer-lic a{color:var(--text-tertiary);text-decoration:none;letter-spacing:.5px;transition:color .2s var(--ease)}
.footer-lic a:hover{color:var(--gold-400)}
.footer-lic-sep{color:var(--ink-700);font-size:11px}
@media(min-width:768px){.footer-grid{grid-template-columns:2fr 1fr 1fr 1fr;gap:24px}}

/* ===== 动效 / 无障碍 ===== */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .5s var(--ease),transform .5s var(--ease)}
.reveal.in{opacity:1;transform:none}
@keyframes fadeUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:none}}
@media(prefers-reduced-motion:reduce){
  *{animation:none!important;transition:none!important}
  .reveal{opacity:1;transform:none}
  html{scroll-behavior:auto}
}
:focus-visible{outline:2px solid var(--accent);outline-offset:3px;border-radius:2px}
.skip{position:absolute;left:-9999px;top:0;background:var(--gold-500);color:var(--ink-950);padding:10px 16px;z-index:200;font-size:14px}
.skip:focus{left:12px;top:12px}

/* ===== 产品卡 ===== */
.product-grid{display:grid;gap:24px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.product-card{
  background:var(--surface-raised);border:1px solid var(--border);border-radius:var(--radius-md);
  overflow:hidden;transition:transform .25s var(--ease),border-color .25s var(--ease);
}
.product-card:hover{transform:translateY(-4px);border-color:var(--accent-line)}
.product-visual{
  aspect-ratio:1/1;position:relative;
  background:radial-gradient(circle at 50% 45%, rgba(168,133,90,.18), transparent 58%),var(--ink-950);
  display:flex;align-items:center;justify-content:center;overflow:hidden;
}
.product-visual::after{
  content:"";width:38%;aspect-ratio:1/1;border-radius:50%;
  border:1px solid rgba(168,133,90,.85);
  box-shadow:inset 0 0 0 6px rgba(168,133,90,.07),0 0 32px rgba(168,133,90,.18);
  transition:transform .3s var(--ease);
}
.product-card:hover .product-visual::after{transform:scale(1.05)}
.product-visual.nanhong::after{border-color:rgba(125,72,56,.9);box-shadow:inset 0 0 0 6px rgba(125,72,56,.08),0 0 32px rgba(125,72,56,.2)}
.product-body{padding:24px}
.product-series{font-family:var(--font-latin);font-size:11px;letter-spacing:3px;text-transform:uppercase;color:var(--accent-soft)}
.product-card .nanhong-tag{color:var(--ochre)}
.product-name{font-family:var(--font-serif);font-size:19px;font-weight:600;letter-spacing:2px;margin:8px 0 18px}
.product-spec{display:grid;gap:12px}
.product-spec .row{border-top:1px solid var(--border-subtle);padding-top:10px}
.product-spec dt{font-size:11px;letter-spacing:2px;color:var(--fg-subtle);margin-bottom:4px}
.product-spec dd{font-size:13px;color:var(--fg-muted);line-height:1.7;margin:0}

/* ===== 步骤列表（定制逻辑） ===== */
.step-list{display:grid;gap:1px;background:var(--border);border:1px solid var(--border)}
.step{background:var(--surface);padding:32px 28px;display:flex;gap:20px;align-items:flex-start;transition:background .25s var(--ease)}
.step:hover{background:var(--surface-raised)}
.step-num{font-family:var(--font-latin);font-size:26px;color:var(--accent);line-height:1;flex-shrink:0;width:44px}
.step h3{font-family:var(--font-serif);font-size:18px;font-weight:600;letter-spacing:1px;margin-bottom:8px}
.step p{font-size:14px;color:var(--fg-muted);line-height:1.8}
@media(min-width:768px){.step-list{grid-template-columns:repeat(2,1fr)}}

/* ===== 场景卡 ===== */
.scene-grid{display:grid;gap:20px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr))}
.scene-card{
  background:var(--surface-raised);border:1px solid var(--border);border-radius:var(--radius-md);
  padding:36px 24px;text-align:center;
  transition:transform .25s var(--ease),border-color .25s var(--ease);
}
.scene-card:hover{transform:translateY(-4px);border-color:var(--accent-line)}
.scene-ico{
  width:48px;height:48px;margin:0 auto 20px;border:1px solid var(--accent);border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-serif);color:var(--accent);font-size:18px;
}
.scene-card h3{font-family:var(--font-serif);font-size:17px;font-weight:600;letter-spacing:1px;margin-bottom:10px}
.scene-card p{font-size:13px;color:var(--fg-muted);line-height:1.8}

/* ===== 故事卡 ===== */
.story-grid{display:grid;gap:24px;grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.story-card{
  background:var(--surface-raised);border:1px solid var(--border);border-radius:var(--radius-md);
  padding:36px 28px;transition:transform .25s var(--ease),border-color .25s var(--ease);
}
.story-card:hover{transform:translateY(-4px);border-color:var(--accent-line)}
.story-quote{font-family:var(--font-serif);font-size:16px;line-height:1.9;color:var(--fg-strong);margin-bottom:24px;letter-spacing:1px}
.story-meta{display:flex;align-items:center;gap:12px;padding-top:20px;border-top:1px solid var(--border-subtle)}
.story-avatar{
  width:36px;height:36px;border-radius:50%;background:var(--border-subtle);
  display:flex;align-items:center;justify-content:center;
  font-family:var(--font-serif);color:var(--accent-soft);font-size:14px;flex-shrink:0;
}
.story-name{font-size:13px;color:var(--fg-muted)}
.story-tag{font-size:11px;color:var(--fg-subtle);letter-spacing:1px}

/* ===== 色卡 ===== */
.swatches{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(150px,1fr))}
.swatch{border:1px solid var(--border);border-radius:var(--radius-md);overflow:hidden;background:var(--surface-raised)}
.swatch-chip{height:88px}
.swatch-body{padding:16px}
.swatch-name{font-family:var(--font-serif);font-size:15px;font-weight:600;letter-spacing:1px;margin-bottom:4px}
.swatch-hex{font-size:12px;color:var(--fg-subtle);margin-bottom:8px;letter-spacing:1px}
.swatch-desc{font-size:12px;color:var(--fg-muted);line-height:1.7}

/* ===== 逐字释义（晟 / 金 / 局） ===== */
.verse-grid{display:grid;gap:24px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.verse-card{
  background:var(--surface-raised);border:1px solid var(--border);border-radius:var(--radius-md);
  padding:44px 28px;text-align:center;
  transition:transform .25s var(--ease),border-color .25s var(--ease);
}
.verse-card:hover{transform:translateY(-4px);border-color:var(--accent-line)}
.verse-char{font-family:var(--font-serif);font-size:64px;font-weight:600;color:var(--accent);line-height:1;margin-bottom:20px}
.verse-line{font-family:var(--font-serif);font-size:17px;letter-spacing:2px;color:var(--fg-strong);margin-bottom:16px}
.verse-desc{font-size:13px;color:var(--fg-muted);line-height:1.8}

/* ===== CTA 横幅 ===== */
.cta-band{
  text-align:center;padding:96px 0;
  background:radial-gradient(ellipse 60% 50% at 50% 50%, rgba(168,133,90,.12), transparent 62%),var(--ink-950);
}
.cta-band h2{
  font-family:var(--font-serif);font-size:clamp(24px,5vw,34px);font-weight:600;
  letter-spacing:3px;margin-bottom:18px;line-height:1.5;
}
.cta-band p{color:var(--text-secondary);font-size:15px;margin-bottom:40px;line-height:1.9;max-width:560px;margin-left:auto;margin-right:auto}

/* ===== 联系信息 ===== */
.contact-grid{display:grid;gap:40px 32px;grid-template-columns:repeat(auto-fit,minmax(220px,1fr))}
.contact-item{text-align:center}
.contact-item .label{font-family:var(--font-latin);font-size:11px;letter-spacing:4px;text-transform:uppercase;color:var(--accent-soft);margin-bottom:14px}
.contact-item .value{font-family:var(--font-serif);font-size:18px;letter-spacing:1px;color:var(--fg-strong);line-height:1.7}
.contact-item .note{font-size:13px;color:var(--fg-subtle);margin-top:8px;line-height:1.7}

/* ===== 系列导语（图文左右） ===== */
.series-intro{display:grid;gap:40px;align-items:center;margin-bottom:56px}
@media(min-width:992px){.series-intro{grid-template-columns:1fr 1fr;gap:64px}}
.series-intro .visual{
  aspect-ratio:4/3;border-radius:var(--radius-md);
  background:radial-gradient(circle at 50% 45%, rgba(168,133,90,.16), transparent 58%),var(--ink-950);
  border:1px solid var(--ink-600);
  display:flex;align-items:center;justify-content:center;
}
.series-intro .visual.alt{background:radial-gradient(circle at 50% 45%, rgba(125,72,56,.16), transparent 58%),var(--ink-950)}
.series-intro .visual::after{
  content:"";width:30%;aspect-ratio:1/1;border-radius:50%;
  border:1px solid rgba(168,133,90,.8);box-shadow:inset 0 0 0 6px rgba(168,133,90,.06);
}
.series-intro .visual.alt::after{border-color:rgba(125,72,56,.85);box-shadow:inset 0 0 0 6px rgba(125,72,56,.07)}
.series-lead{font-family:var(--font-serif);font-size:clamp(17px,3vw,21px);line-height:1.9;color:var(--fg-strong);letter-spacing:1px;margin-bottom:24px}


/* ============================================
   暮霭初晓 Dawn · 亮色区段
   ============================================ */
section[data-surface]{background:var(--surface)}
[data-surface="light"]{
  --surface:var(--dawn-bg);
  --surface-raised:var(--dawn-card);
  --surface-sunken:var(--dawn-sunken);
  --border:var(--dawn-line);
  --border-subtle:var(--dawn-line-soft);
  --fg:var(--dawn-ink);
  --fg-strong:var(--dawn-ink);
  --fg-muted:var(--dawn-sub);
  --fg-subtle:var(--dawn-sub-soft);
  --accent:var(--dawn-primary);
  --accent-soft:var(--dawn-primary-deep);
  --accent-line:rgba(111,83,38,.45);
  --accent-glow:rgba(111,83,38,.10);
  color:var(--fg);
}
[data-surface="light"] .btn-primary{background:var(--dawn-primary);color:#FFFFFF}
[data-surface="light"] .btn-primary:hover{background:var(--dawn-primary-deep)}
[data-surface="light"] .btn-ghost{color:var(--dawn-ink);border-color:rgba(111,83,38,.4)}
[data-surface="light"] .btn-ghost:hover{border-color:var(--dawn-primary)}
[data-surface="light"] .rule{background:linear-gradient(var(--dawn-primary),transparent)}
[data-surface="light"] :focus-visible{outline-color:var(--dawn-primary)}
[data-surface="light"] .swatch-chip{border-bottom:1px solid var(--dawn-line)}
[data-surface="light"] .line-num,[data-surface="light"] .story-tag{color:var(--dawn-sub-soft)}

/* ===== 导航 · 进入亮色区自动反色 ===== */
.logo-on-light{display:none}
.nav.on-light .logo-on-dark{display:none}
.nav.on-light .logo-on-light{display:block}
.nav.on-light .logo-word{color:var(--dawn-ink)}
.nav.on-light .logo-en{color:var(--dawn-sub-soft)}
.nav.on-light .nav-links a{color:var(--dawn-sub)}
.nav.on-light .nav-links a:hover{color:var(--dawn-ink)}
.nav.on-light .nav-links a[aria-current="page"]{color:var(--dawn-ink)}
.nav.on-light .nav-links a::after{background:var(--dawn-primary)}
.nav.on-light .hamburger span{background:var(--dawn-ink)}
.nav.on-light .btn-ghost{color:var(--dawn-ink);border-color:rgba(111,83,38,.4)}
.nav.on-light .btn-ghost:hover{border-color:var(--dawn-primary)}
.nav.on-light.scrolled{background:rgba(236,230,216,.88);border-bottom-color:var(--dawn-line)}
.nav.on-light :focus-visible{outline-color:var(--dawn-primary)}
.drawer.on-light{background:var(--dawn-bg)}
.drawer.on-light a{color:var(--dawn-sub);border-bottom-color:var(--dawn-line)}
.drawer.on-light a:hover{color:var(--dawn-ink)}

/* ===== 抽屉 CTA ===== */
.drawer .drawer-cta{color:var(--gold-500)}
.drawer.on-light .drawer-cta{color:var(--dawn-primary)}

/* ============================================
   敦煌重彩 Dunhuang · 高饱和暗调主题
   用法：<html data-theme="dunhuang">
   ============================================ */
[data-theme="dunhuang"]{
  --ink-950:#0B0907; --ink-900:#12100C; --ink-800:#1D1811;
  --ink-700:#2C241A; --ink-600:#3E3427;
  --gold-500:#E2503F; --gold-600:#F0654F; --gold-400:#E9A93A;
  --gold-300:#F0C674; --gold-100:#F7E3B8; --gold-700:#B4352A;
  --ivory:#F2E9D8; --ochre:#E2503F; --smoke:#6E7E86;
  --text-primary:#F2E9D8; --text-secondary:#C0B49E; --text-tertiary:#948A79;
  --c-red:#E2503F;    --c-blue:#3D8FC4;   --c-green:#35A66E;
  --c-yellow:#E9A93A; --c-purple:#A670C4; --c-gold:#D9AE5C;
  --on-accent:#120C08;
  --accent-line:rgba(226,80,63,.55);
  --accent-glow:rgba(226,80,63,.16);
}

/* 光晕：朱砂 + 藤黄双色 */
[data-theme="dunhuang"] .hero{
  background:
    radial-gradient(ellipse 60% 45% at 50% 38%, rgba(226,80,63,.18), transparent 60%),
    radial-gradient(ellipse 80% 60% at 50% 110%, rgba(233,169,58,.12), transparent 55%),
    var(--ink-900);
}
[data-theme="dunhuang"] .hero::before,
[data-theme="dunhuang"] .page-hero::before{
  background-image:linear-gradient(rgba(226,80,63,.07) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(233,169,58,.05) 1px,transparent 1px);
}
[data-theme="dunhuang"] .page-hero{
  background:radial-gradient(ellipse 60% 50% at 50% 30%, rgba(226,80,63,.15), transparent 62%),var(--ink-900);
}
[data-theme="dunhuang"] .cta-band{
  background:radial-gradient(ellipse 60% 50% at 50% 50%, rgba(226,80,63,.14), transparent 62%),var(--ink-950);
}
[data-theme="dunhuang"] .product-visual{
  background:radial-gradient(circle at 50% 45%, rgba(226,80,63,.22), transparent 58%),var(--ink-950);
}
[data-theme="dunhuang"] .product-visual::after,
[data-theme="dunhuang"] .product-visual.nanhong::after{
  border-color:rgba(226,80,63,.95);
  box-shadow:inset 0 0 0 6px rgba(226,80,63,.09),0 0 34px rgba(226,80,63,.26);
}
[data-theme="dunhuang"] .series-intro .visual{
  background:radial-gradient(circle at 50% 45%, rgba(226,80,63,.18), transparent 58%),var(--ink-950);
}
[data-theme="dunhuang"] .series-intro .visual.alt{
  background:radial-gradient(circle at 50% 45%, rgba(61,143,196,.18), transparent 58%),var(--ink-950);
}
[data-theme="dunhuang"] .series-intro .visual::after{border-color:rgba(226,80,63,.9);box-shadow:inset 0 0 0 6px rgba(226,80,63,.07)}
[data-theme="dunhuang"] .series-intro .visual.alt::after{border-color:rgba(61,143,196,.9);box-shadow:inset 0 0 0 6px rgba(61,143,196,.07)}

/* 按钮：高饱和底配深色字（白字不达标） */
[data-theme="dunhuang"] .btn-primary{color:var(--on-accent)}
[data-theme="dunhuang"] .btn-ghost{border-color:rgba(226,80,63,.5)}
[data-theme="dunhuang"] .skip{color:var(--on-accent)}

/* 三大产品线 · 系列标识色 */
[data-theme="dunhuang"] .line-card.series-gold{--series-c:var(--c-gold)}
[data-theme="dunhuang"] .line-card.series-nanhong{--series-c:var(--c-red)}
[data-theme="dunhuang"] .line-card.series-custom{--series-c:var(--c-blue)}
[data-theme="dunhuang"] .line-card::before{
  height:2px;opacity:.6;
  background:linear-gradient(90deg,transparent,var(--series-c,var(--c-red)),transparent);
}
[data-theme="dunhuang"] .line-card:hover::before{opacity:1}
[data-theme="dunhuang"] .line-card:hover{border-color:var(--series-c,var(--accent))}
[data-theme="dunhuang"] .line-card .line-en{color:var(--series-c,var(--gold-400))}
[data-theme="dunhuang"] .line-card .line-num{display:flex;align-items:center;gap:8px;color:var(--series-c,var(--gold-400))}
[data-theme="dunhuang"] .line-card .line-num::before{
  content:"";width:7px;height:7px;border-radius:50%;
  background:var(--series-c,var(--gold-400));flex-shrink:0;
}

/* 四大理念 · 四色图标 */
[data-theme="dunhuang"] .ideal:nth-child(1) .ideal-ico{--ic:var(--c-yellow)}
[data-theme="dunhuang"] .ideal:nth-child(2) .ideal-ico{--ic:var(--c-red)}
[data-theme="dunhuang"] .ideal:nth-child(3) .ideal-ico{--ic:var(--c-green)}
[data-theme="dunhuang"] .ideal:nth-child(4) .ideal-ico{--ic:var(--c-blue)}
[data-theme="dunhuang"] .ideal-ico{border-color:var(--ic);color:var(--ic)}
[data-theme="dunhuang"] .step-num{color:var(--c-yellow)}
[data-theme="dunhuang"] .scene-ico{border-color:var(--c-yellow);color:var(--c-yellow)}
[data-theme="dunhuang"] .verse-char{color:var(--c-red)}

/* ============================================
   盛唐鎏金 Shengtang Gilt · 暖金静奢主题（含低饱和点缀）
   用法：<html data-theme="shengtang">
   主色鎏金 #B8954A 承担交互；点缀四色只做系列/理念标识，大面积始终墨黑底
   ============================================ */
[data-theme="shengtang"]{
  --ink-950:#12100C; --ink-900:#1A1711; --ink-800:#262218;
  --ink-700:#383226; --ink-600:#4A4232;
  --gold-500:#B8954A; --gold-600:#9C7A38; --gold-400:#C5A968;
  --gold-300:#D3BC83; --gold-100:#F0E7D0; --gold-700:#7E632E;
  --ivory:#F4EFE4; --ochre:#8E3B31; --smoke:#8B938E;
  --text-primary:#F4EFE4; --text-secondary:#B5AC99; --text-tertiary:#8A8272;
  --c-gold:#C9A24B; --c-red:#C4453C; --c-brown:#B8733A; --c-sand:#E0A979;
  --on-accent:#12100C;
  --accent-line:rgba(184,149,74,.5);
  --accent-glow:rgba(184,149,74,.14);
}

/* 光晕：暖金主光 + 暗红底晕，去雾版（光晕减半 + 去掉网格线） */
[data-theme="shengtang"] .hero{
  background:
    radial-gradient(ellipse 60% 45% at 50% 38%, rgba(184,149,74,.08), transparent 60%),
    radial-gradient(ellipse 80% 60% at 50% 110%, rgba(196,69,60,.04), transparent 55%),
    var(--ink-900);
}
/* shengtang 主题去网格线：让 sajin 纹理独自承担肌理，不与网格双层叠加造成雾感 */
[data-theme="shengtang"] .hero::before,
[data-theme="shengtang"] .page-hero::before{
  background:none;
}
[data-theme="shengtang"] .page-hero{
  background:radial-gradient(ellipse 60% 50% at 50% 30%, rgba(184,149,74,.07), transparent 62%),var(--ink-900);
}
[data-theme="shengtang"] .cta-band{
  background:radial-gradient(ellipse 60% 50% at 50% 50%, rgba(184,149,74,.07), transparent 62%),var(--ink-950);
}
[data-theme="shengtang"] .product-visual{
  background:radial-gradient(circle at 50% 45%, rgba(184,149,74,.20), transparent 58%),var(--ink-950);
}
[data-theme="shengtang"] .product-visual.nanhong{
  background:radial-gradient(circle at 50% 45%, rgba(196,69,60,.18), transparent 58%),var(--ink-950);
}
[data-theme="shengtang"] .product-visual::after{
  border-color:rgba(184,149,74,.85);
  box-shadow:inset 0 0 0 6px rgba(184,149,74,.07),0 0 32px rgba(184,149,74,.18);
}
[data-theme="shengtang"] .product-visual.nanhong::after{
  border-color:rgba(196,69,60,.9);
  box-shadow:inset 0 0 0 6px rgba(196,69,60,.08),0 0 32px rgba(196,69,60,.2);
}
[data-theme="shengtang"] .series-intro .visual{
  background:radial-gradient(circle at 50% 45%, rgba(184,149,74,.18), transparent 58%),var(--ink-950);
}
[data-theme="shengtang"] .series-intro .visual.alt{
  background:radial-gradient(circle at 50% 45%, rgba(196,69,60,.16), transparent 58%),var(--ink-950);
}
[data-theme="shengtang"] .series-intro .visual::after{border-color:rgba(184,149,74,.8);box-shadow:inset 0 0 0 6px rgba(184,149,74,.06)}
[data-theme="shengtang"] .series-intro .visual.alt::after{border-color:rgba(196,69,60,.85);box-shadow:inset 0 0 0 6px rgba(196,69,60,.07)}

/* 按钮：鎏金底配深色字 */
[data-theme="shengtang"] .btn-primary{color:var(--on-accent)}
[data-theme="shengtang"] .btn-ghost{border-color:rgba(184,149,74,.45)}
[data-theme="shengtang"] .skip{color:var(--on-accent)}

/* 三大产品线 · 系列标识色（藤黄金/赭红/赭褐） */
[data-theme="shengtang"] .line-card.series-gold{--series-c:var(--c-gold)}
[data-theme="shengtang"] .line-card.series-nanhong{--series-c:var(--c-red)}
[data-theme="shengtang"] .line-card.series-custom{--series-c:var(--c-brown)}
[data-theme="shengtang"] .line-card::before{
  height:2px;opacity:.55;
  background:linear-gradient(90deg,transparent,var(--series-c,var(--c-gold)),transparent);
}
[data-theme="shengtang"] .line-card:hover::before{opacity:1}
[data-theme="shengtang"] .line-card:hover{border-color:var(--series-c,var(--accent))}
[data-theme="shengtang"] .line-card .line-en{color:var(--series-c,var(--gold-400))}
[data-theme="shengtang"] .line-card .line-num{display:flex;align-items:center;gap:8px;color:var(--series-c,var(--gold-400))}
[data-theme="shengtang"] .line-card .line-num::before{
  content:"";width:7px;height:7px;border-radius:50%;
  background:var(--series-c,var(--gold-400));flex-shrink:0;
}

/* 四大理念 · 四色图标（藤黄金/赭红/赭褐/浅金） */
[data-theme="shengtang"] .ideal:nth-child(1) .ideal-ico{--ic:var(--c-gold)}
[data-theme="shengtang"] .ideal:nth-child(2) .ideal-ico{--ic:var(--c-red)}
[data-theme="shengtang"] .ideal:nth-child(3) .ideal-ico{--ic:var(--c-brown)}
[data-theme="shengtang"] .ideal:nth-child(4) .ideal-ico{--ic:var(--c-sand)}
[data-theme="shengtang"] .ideal-ico{border-color:var(--ic);color:var(--ic)}


/* ===== 盛唐鎏金 · 锦地纹底纹（菱格 + 中心点） ===== */
[data-theme="shengtang"] body{
  background-image:url("../tex/sajin-shine.png");
  background-size:360px 360px;
}
/* 方案二 · 背光聚束：去掉横贯画面的大光晕和暗红底晕，
   背光由 .hero-brand-main::before 精确托在 logo 正后方，四周保持纯黑 */
[data-theme="shengtang"] .hero{
  background:
    url("../tex/sajin-shine.png"),
    var(--ink-900);
}
/* 文字提亮：eyebrow 亮金 / 标语米金 / 正文提一档 */
[data-theme="shengtang"] .hero-eyebrow{color:var(--gold-300)}
[data-theme="shengtang"] .hero-sub{color:var(--gold-100)}
[data-theme="shengtang"] .hero-lead{color:#C9BFA8}
[data-theme="shengtang"] .page-hero{
  background:
    url("../tex/sajin-shine.png"),
    radial-gradient(ellipse 60% 50% at 50% 30%, rgba(184,149,74,.18), transparent 62%),
    var(--ink-900);
}
[data-theme="shengtang"] .cta-band{
  background:
    url("../tex/sajin-shine.png"),
    radial-gradient(ellipse 60% 50% at 50% 50%, rgba(184,149,74,.16), transparent 62%),
    var(--ink-950);
}