:root{
  --white:#ffffff;
  --ink:#0f1115;
  --blue:#1f5fff;
  --line:#e6e8ee;
  --muted:#6b7280;
  --soft:#f6f7fb;
}
*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:var(--white);
  color:var(--ink);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{display:block;max-width:100%;}
a{color:inherit;text-decoration:none;}
.en{font-style:italic;color:var(--muted);font-family:"Iowan Old Style","Palatino Linotype",Georgia,serif;}
section{scroll-margin-top:76px;}
.wrap{max-width:1180px;margin:0 auto;padding:0 24px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(140%) blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  max-width:1180px;margin:0 auto;padding:0 24px;
  height:64px;display:flex;align-items:center;gap:20px;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px;letter-spacing:.5px;}
.brand img{height:34px;width:34px;border-radius:8px;object-fit:cover;}
.brand .brand-en{font-style:italic;font-weight:500;font-size:12px;color:var(--muted);letter-spacing:1.5px;margin-left:2px;}
.nav{display:flex;gap:4px;margin-left:auto;align-items:center;}
.nav a{
  font-size:14px;padding:8px 12px;border-radius:8px;color:#2b2f38;
  transition:background .18s,color .18s;
}
.nav a:hover{background:var(--soft);color:var(--blue);}
.nav .nav-download{
  margin-left:6px;border:1px solid var(--ink);font-weight:600;padding:8px 18px;
}
.nav .nav-download:hover{background:var(--ink);color:var(--white);}
.menu-btn{
  display:none;margin-left:auto;background:none;border:1px solid var(--line);
  border-radius:8px;padding:7px 14px;font-size:14px;color:var(--ink);cursor:pointer;
}
.mobile-nav{display:none;border-top:1px solid var(--line);background:var(--white);}
.mobile-nav.open{display:block;}
.mobile-nav a{display:block;padding:13px 24px;font-size:15px;border-bottom:1px solid var(--line);}
.mobile-nav a:last-child{border-bottom:none;}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;border-bottom:1px solid var(--line);}
.hero-bg{
  position:absolute;inset:0;
  background-image:url("images/xs-07-scene-diner.webp");
  background-size:cover;background-position:center;
  opacity:.26;
}
.hero-inner{position:relative;padding:88px 0 72px;}
.hero-kicker{font-size:13px;letter-spacing:3px;color:var(--blue);font-weight:600;margin-bottom:18px;}
.hero h1{
  font-size:clamp(30px,4.6vw,54px);
  line-height:1.22;font-weight:800;letter-spacing:-.5px;max-width:16em;
}
.hero h1 .h1-en{
  display:block;font-size:.42em;font-weight:500;margin-top:16px;
  letter-spacing:.5px;font-style:italic;color:#4b5160;
}
.hero-lead{max-width:34em;margin-top:22px;font-size:16px;color:#3a3f4a;}
.hero-actions{display:flex;gap:14px;margin-top:32px;flex-wrap:wrap;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:13px 30px;border-radius:999px;font-size:15px;font-weight:600;
  transition:transform .18s,box-shadow .18s,background .18s;
}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 22px rgba(31,95,255,.28);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(31,95,255,.34);}
.btn-ghost{border:1.5px solid var(--ink);color:var(--ink);background:rgba(255,255,255,.6);}
.btn-ghost:hover{background:var(--ink);color:#fff;}

.dialogue{
  margin-top:52px;display:grid;grid-template-columns:1fr 1fr;gap:0;
  border:1px solid var(--line);border-radius:14px;overflow:hidden;
  background:rgba(255,255,255,.86);
}
.dialogue-col{padding:24px 28px;}
.dialogue-col + .dialogue-col{border-left:1px solid var(--line);}
.dialogue-col h3{font-size:12px;letter-spacing:2px;font-weight:600;color:var(--muted);margin-bottom:14px;}
.line-cn{font-size:16px;margin-bottom:10px;}
.line-cn b{color:var(--blue);font-weight:600;}
.line-en{font-size:14px;font-style:italic;color:#5a6070;}
.line-en span{color:var(--blue);}

/* ---------- section shell ---------- */
.block{padding:82px 0;}
.block.soft{background:var(--soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.block-head{display:flex;align-items:flex-end;justify-content:space-between;gap:24px;margin-bottom:42px;flex-wrap:wrap;}
.block-head h2{font-size:clamp(24px,3vw,34px);font-weight:800;letter-spacing:-.3px;line-height:1.3;}
.block-head .h2-en{font-size:13px;font-style:italic;color:var(--muted);margin-top:8px;letter-spacing:.6px;}
.block-head p{max-width:30em;color:#4a505c;font-size:15px;}

/* ---------- 双语片单 ---------- */
.poster-row{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;}
.poster{text-align:left;}
.poster-frame{
  border-radius:12px;overflow:hidden;border:1px solid var(--line);
  background:#fff;aspect-ratio:2/3;
}
.poster-frame img{width:100%;height:100%;object-fit:cover;transition:transform .4s;}
.poster:hover .poster-frame img{transform:scale(1.04);}
.poster-cn{font-size:15px;font-weight:600;margin-top:12px;}
.poster-en{font-size:12px;font-style:italic;color:var(--muted);letter-spacing:.4px;}

/* ---------- 字幕样式 ---------- */
.sub-list{border-top:1px solid var(--line);}
.sub-row{
  display:grid;grid-template-columns:200px 1fr;gap:28px;align-items:start;
  padding:26px 0;border-bottom:1px solid var(--line);
}
.sub-name{font-size:17px;font-weight:700;}
.sub-name .en{display:block;font-size:12px;font-weight:400;margin-top:4px;}
.sub-demo{font-size:15px;color:#3a3f4a;}
.sub-demo .demo-line{
  display:block;background:var(--soft);border-left:3px solid var(--blue);
  padding:10px 16px;border-radius:0 8px 8px 0;
}
.sub-demo .demo-line + .demo-line{margin-top:8px;}
.sub-demo em{color:var(--blue);font-style:normal;font-weight:600;}
.sub-demo .demo-en{font-style:italic;color:#5a6070;font-size:13.5px;}

/* ---------- 术语表 ---------- */
.term-grid{display:grid;grid-template-columns:1fr 1fr;gap:0 48px;}
.term-item{
  display:flex;justify-content:space-between;align-items:baseline;gap:16px;
  padding:16px 0;border-bottom:1px dashed var(--line);
}
.term-en{font-style:italic;font-family:Georgia,serif;font-size:15px;color:var(--blue);}
.term-cn{font-size:15px;color:#2b2f38;}

/* ---------- 图集 ---------- */
.gallery{display:grid;grid-template-columns:repeat(5,1fr);gap:14px;}
.gallery figure{border-radius:12px;overflow:hidden;border:1px solid var(--line);background:#fff;cursor:zoom-in;}
.gallery img{width:100%;aspect-ratio:3/4;object-fit:cover;transition:transform .4s;}
.gallery figure:hover img{transform:scale(1.05);}

/* ---------- 使用指南 ---------- */
.guide-wrap{display:grid;grid-template-columns:320px 1fr;gap:52px;align-items:start;}
.guide-card{border:1px solid var(--line);border-radius:14px;overflow:hidden;background:#fff;position:sticky;top:90px;}
.guide-card img{width:100%;}
.guide-steps{display:flex;flex-direction:column;gap:0;}
.step{
  display:grid;grid-template-columns:56px 1.2fr 1fr;gap:20px;
  padding:24px 0;border-bottom:1px solid var(--line);
}
.step-no{
  font-size:26px;font-weight:800;font-style:italic;color:var(--blue);
  font-family:Georgia,serif;line-height:1;
}
.step-cn .step-title{font-size:16px;font-weight:700;margin-bottom:6px;}
.step-cn p{font-size:14px;color:#4a505c;}
.step-cn .step-note{font-size:12.5px;color:var(--muted);margin-top:6px;}
.step-en{font-size:13px;font-style:italic;color:#6b7280;line-height:1.65;}

/* ---------- 常见问题 ---------- */
.faq-table{border-top:1px solid var(--line);}
.faq-row{
  display:grid;grid-template-columns:280px 1fr;gap:28px;
  padding:20px 0;border-bottom:1px solid var(--line);
}
.faq-q{font-size:15px;font-weight:600;}
.faq-a{font-size:14.5px;color:#3a3f4a;}
.faq-a .en{display:block;font-size:12.5px;margin-top:6px;color:#7a808c;}

/* ---------- 下载 ---------- */
.download-block{
  border:2px solid var(--ink);border-radius:18px;padding:56px 44px;text-align:center;
  background:var(--white);
}
.download-block h2{font-size:clamp(24px,3vw,34px);font-weight:800;margin-bottom:14px;}
.download-block .h2-en{font-size:13px;font-style:italic;color:var(--muted);margin-bottom:22px;}
.download-block p{max-width:32em;margin:0 auto 32px;color:#4a505c;font-size:15px;}
.dl-actions{display:flex;gap:16px;justify-content:center;flex-wrap:wrap;}

/* ---------- 页脚 ---------- */
.site-footer{
  border-top:1px solid var(--line);padding:36px 0 44px;background:var(--white);
}
.footer-inner{
  display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap;
  font-size:12.5px;color:#8b909b;line-height:1.9;
}
.footer-inner a{color:#8b909b;}
.footer-inner a:hover{color:var(--blue);}

/* ---------- 灯箱 ---------- */
.lightbox{
  position:fixed;inset:0;z-index:200;display:none;
  background:rgba(15,17,21,.9);align-items:center;justify-content:center;padding:32px;
}
.lightbox.on{display:flex;}
.lightbox img{max-width:92vw;max-height:88vh;border-radius:8px;object-fit:contain;}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .poster-row{grid-template-columns:repeat(3,1fr);}
  .gallery{grid-template-columns:repeat(3,1fr);}
  .guide-wrap{grid-template-columns:1fr;gap:36px;}
  .guide-card{position:static;max-width:360px;}
  .faq-row{grid-template-columns:220px 1fr;}
  .header-inner{padding:0 20px;}
}
@media (max-width:900px){
  .nav{display:none;}
  .menu-btn{display:block;}
}
@media (max-width:768px){
  .hero-inner{padding:56px 0 48px;}
  .dialogue{grid-template-columns:1fr;}
  .dialogue-col + .dialogue-col{border-left:none;border-top:1px solid var(--line);}
  .block{padding:56px 0;}
  .poster-row{grid-template-columns:repeat(2,1fr);}
  .gallery{grid-template-columns:repeat(2,1fr);}
  .sub-row{grid-template-columns:1fr;gap:10px;}
  .term-grid{grid-template-columns:1fr;gap:0;}
  .step{grid-template-columns:40px 1fr;gap:12px;}
  .step-en{grid-column:2;font-size:12.5px;}
  .faq-row{grid-template-columns:1fr;gap:8px;}
  .download-block{padding:40px 22px;}
  .wrap{padding:0 18px;}
  .brand .brand-en{display:none;}
}