/* ZALO 方案一 · 杂志型 / Magazine Layout
   配色: 米白纸张 + 越南红 + 墨黑,衬线字体
   关键词布局: 封面专题、专栏、Cover Story、Dossier、Index
*/

:root{
  --paper:#f5f1e8;
  --ink:#1a1410;
  --ink-soft:#5a4f44;
  --red:#bf2c2c;
  --rule:#1a1410;
  --accent:#d4af37;
  --max:1180px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:Georgia,"Times New Roman","Source Han Serif SC",serif;
  font-size:17px;
  line-height:1.65;
  text-rendering:optimizeLegibility;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}

/* ===== 顶部刊头 ===== */
.masthead{
  border-bottom:4px double var(--rule);
  padding:18px 0 14px;
}
.mast-inner{
  max-width:var(--max);
  margin:0 auto;
  padding:0 28px;
  display:grid;
  grid-template-columns:auto 1fr auto;
  align-items:center;
  gap:24px;
}
.logo{display:flex;align-items:center;gap:10px;font-weight:bold;letter-spacing:.18em}
.logo img{width:36px;height:36px}
.logo span{font-size:18px}
.masthead nav{display:flex;justify-content:center;gap:22px;font-size:14px;letter-spacing:.05em}
.masthead nav a{position:relative;padding-bottom:4px}
.masthead nav a:hover{color:var(--red)}
.issue{
  font-style:italic;
  font-size:13px;
  color:var(--ink-soft);
  letter-spacing:.05em;
}

/* ===== 封面 / Cover ===== */
.cover{
  max-width:var(--max);
  margin:0 auto;
  padding:60px 28px 80px;
  display:grid;
  grid-template-columns:1.05fr 1fr;
  gap:60px;
  align-items:center;
}
.cover-text .kicker{
  font-family:"Helvetica",sans-serif;
  font-size:11px;
  letter-spacing:.32em;
  color:var(--red);
  font-weight:bold;
  margin-bottom:18px;
}
.cover-text h1{
  font-size:clamp(42px,5.4vw,72px);
  line-height:1.05;
  font-weight:normal;
  letter-spacing:-.01em;
}
.cover-text h1 em{
  font-style:italic;
  color:var(--red);
  font-weight:normal;
}
.cover-text .deck{
  font-size:18px;
  color:var(--ink-soft);
  margin:24px 0;
  font-style:italic;
}
.byline{
  display:flex;
  justify-content:space-between;
  border-top:1px solid var(--rule);
  border-bottom:1px solid var(--rule);
  padding:10px 0;
  font-family:"Helvetica",sans-serif;
  font-size:11px;
  letter-spacing:.18em;
  margin-bottom:28px;
}
.pdf-cta{
  display:inline-block;
  background:var(--ink);
  color:var(--paper);
  padding:18px 32px;
  font-family:"Helvetica",sans-serif;
  font-size:13px;
  letter-spacing:.22em;
  font-weight:bold;
  border-radius:0;
  transition:.25s;
}
.pdf-cta:hover{background:var(--red);transform:translateY(-2px)}
.cover-img{position:relative}
.cover-img img{
  width:100%;
  border:1px solid var(--rule);
  padding:8px;
  background:#fff;
  box-shadow:8px 8px 0 var(--ink);
}
.cover-img figcaption{
  font-size:12px;
  color:var(--ink-soft);
  margin-top:10px;
  font-style:italic;
  letter-spacing:.04em;
}

/* ===== 专栏 Feature ===== */
.feature{
  max-width:var(--max);
  margin:0 auto;
  padding:60px 28px;
}
.feature-head{
  display:flex;
  align-items:center;
  gap:20px;
  margin-bottom:48px;
}
.feature-head h2{
  font-size:42px;
  font-weight:normal;
  letter-spacing:-.01em;
}
.feature-head h2 em{
  font-style:italic;
  color:var(--red);
}
.rule{flex:1;height:2px;background:var(--rule)}
.feature .lead{
  font-size:22px;
  font-style:italic;
  color:var(--ink-soft);
  max-width:780px;
  margin-bottom:60px;
  line-height:1.5;
}
.feature-row{
  display:grid;
  grid-template-columns:120px 1fr;
  gap:40px;
  padding:36px 0;
  border-top:1px solid var(--rule);
  align-items:start;
}
.feature-row:last-child{border-bottom:1px solid var(--rule)}
.feature-num{
  font-size:64px;
  color:var(--red);
  font-style:italic;
  line-height:1;
}
.feature-body h3{
  font-size:26px;
  margin-bottom:12px;
  font-weight:normal;
  letter-spacing:-.01em;
}
.feature-row.reverse{grid-template-columns:1fr 120px}
.feature-row.reverse .feature-num{order:2;text-align:right}

/* ===== 专栏列表 / Columns ===== */
.columns{
  background:var(--ink);
  color:var(--paper);
  padding:80px 0;
}
.columns-head{
  max-width:var(--max);
  margin:0 auto 50px;
  padding:0 28px;
}
.columns-head p{
  font-family:"Helvetica",sans-serif;
  font-size:11px;
  letter-spacing:.32em;
  color:var(--accent);
  margin-bottom:10px;
}
.columns-head h2{
  font-size:42px;
  font-weight:normal;
  font-style:italic;
}
.columns-grid{
  max-width:var(--max);
  margin:0 auto;
  padding:0 28px;
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:30px;
}
.col-card{
  border:1px solid rgba(255,255,255,.18);
  padding:32px;
  transition:.25s;
}
.col-card:hover{background:#251d18;border-color:var(--red)}
.col-cat{
  font-family:"Helvetica",sans-serif;
  font-size:10px;
  letter-spacing:.32em;
  color:var(--accent);
}
.col-card h3{
  font-size:24px;
  margin:14px 0 18px;
  font-weight:normal;
  font-style:italic;
}
.col-card p{
  font-size:15px;
  color:rgba(245,241,232,.78);
  margin-bottom:24px;
}
.col-card a{
  font-family:"Helvetica",sans-serif;
  font-size:11px;
  letter-spacing:.18em;
  color:var(--red);
  font-weight:bold;
}
.col-card a:hover{color:var(--accent)}

/* ===== Dossier / 数据 ===== */
.dossier{max-width:var(--max);margin:0 auto;padding:80px 28px}
.dossier-head{margin-bottom:48px}
.dossier-head p{
  font-family:"Helvetica",sans-serif;
  font-size:11px;
  letter-spacing:.32em;
  color:var(--red);
  margin-bottom:10px;
}
.dossier-head h2{
  font-size:42px;
  font-weight:normal;
  font-style:italic;
}
.dossier-list{
  list-style:none;
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:0;
  border-top:4px double var(--rule);
}
.dossier-list li{
  padding:30px 24px;
  border-bottom:1px solid var(--rule);
  border-right:1px solid var(--rule);
  display:flex;
  flex-direction:column;
}
.dossier-list li:nth-child(3n){border-right:none}
.dossier-list b{
  font-size:46px;
  font-style:italic;
  color:var(--red);
  display:block;
  margin-bottom:8px;
  font-weight:normal;
}
.dossier-list span{
  font-size:14px;
  color:var(--ink-soft);
  line-height:1.5;
}

/* ===== 目录索引 / TOC ===== */
.toc{
  background:var(--paper);
  border-top:1px solid var(--rule);
  padding:80px 0;
}
.toc-head{max-width:var(--max);margin:0 auto 40px;padding:0 28px}
.toc-head p{
  font-family:"Helvetica",sans-serif;
  font-size:11px;
  letter-spacing:.32em;
  color:var(--red);
  margin-bottom:10px;
}
.toc-head h2{font-size:42px;font-style:italic;font-weight:normal}
.toc-grid{
  max-width:var(--max);
  margin:0 auto;
  padding:0 28px;
  display:grid;
  grid-template-columns:repeat(4,1fr);
  gap:0;
  border-top:1px solid var(--rule);
  border-left:1px solid var(--rule);
}
.toc-item{
  padding:32px 24px;
  border-right:1px solid var(--rule);
  border-bottom:1px solid var(--rule);
  display:block;
  transition:.25s;
}
.toc-item:hover{background:var(--red);color:var(--paper)}
.toc-item:hover h4,.toc-item:hover .toc-idx{color:var(--paper)}
.toc-idx{
  font-style:italic;
  font-size:24px;
  color:var(--red);
  display:block;
  margin-bottom:14px;
}
.toc-item h4{
  font-size:22px;
  font-weight:normal;
  margin-bottom:6px;
}
.toc-item p{font-size:13px;color:var(--ink-soft)}
.toc-item:hover p{color:rgba(245,241,232,.86)}

/* ===== Pull Quote ===== */
.pullquote{
  max-width:880px;
  margin:0 auto;
  padding:80px 28px;
  text-align:center;
  border-top:4px double var(--rule);
  border-bottom:4px double var(--rule);
}
.pullquote p{
  font-size:48px;
  font-style:italic;
  line-height:1.2;
  color:var(--ink);
}
.pullquote cite{
  display:block;
  margin-top:24px;
  font-style:normal;
  font-family:"Helvetica",sans-serif;
  font-size:12px;
  letter-spacing:.18em;
  color:var(--ink-soft);
}

/* ===== Footer ===== */
.colophon{
  background:var(--ink);
  color:var(--paper);
  padding:36px 0;
}
.colo-inner{
  max-width:var(--max);
  margin:0 auto;
  padding:0 28px;
  display:flex;
  justify-content:space-between;
  align-items:center;
}
.colophon b{
  font-size:20px;
  letter-spacing:.18em;
}
.colophon p{font-size:13px;color:rgba(245,241,232,.6);margin-top:4px}
.colophon div:last-child{display:flex;gap:24px;font-size:13px}
.colophon a:hover{color:var(--accent)}

/* ===== Hero 标题、Hero CTA 内 download-btn 的指向已交给 index.html ===== */
/* ===== 下载页 (download.html) ===== */
.dl-cover{
  max-width:var(--max);
  margin:0 auto;
  padding:50px 28px 30px;
}
.dl-cover h1{font-size:54px;font-weight:normal;font-style:italic;line-height:1.05}
.dl-cover h1 em{color:var(--red);font-style:italic}
.dl-cover .deck{font-size:18px;color:var(--ink-soft);font-style:italic;margin:18px 0 6px}

.dl-platforms{
  max-width:var(--max);
  margin:0 auto;
  padding:30px 28px;
  display:grid;
  grid-template-columns:repeat(4,1fr);
  border-top:1px solid var(--rule);
  border-bottom:1px solid var(--rule);
}
.dl-pf{
  padding:32px 20px;
  border-right:1px solid var(--rule);
  text-align:center;
}
.dl-pf:last-child{border-right:none}
.dl-pf .pf-name{font-size:11px;letter-spacing:.28em;color:var(--red);font-family:"Helvetica",sans-serif;font-weight:bold}
.dl-pf h3{font-size:24px;font-style:italic;font-weight:normal;margin:8px 0 14px}
.dl-pf .pf-meta{font-size:13px;color:var(--ink-soft);margin-bottom:20px}
.dl-pf .dl-pf-btn{
  display:inline-block;
  background:var(--ink);
  color:var(--paper);
  padding:12px 22px;
  font-size:12px;
  letter-spacing:.18em;
  font-weight:bold;
  font-family:"Helvetica",sans-serif;
  transition:.2s;
}
.dl-pf .dl-pf-btn:hover{background:var(--red)}

.dl-steps{
  max-width:880px;
  margin:0 auto;
  padding:60px 28px;
}
.dl-steps h2{font-size:36px;font-weight:normal;font-style:italic;margin-bottom:30px}
.dl-steps h2 em{color:var(--red);font-style:italic}
.dl-step{
  display:grid;
  grid-template-columns:80px 1fr;
  gap:20px;
  padding:24px 0;
  border-top:1px solid var(--rule);
}
.dl-step:last-child{border-bottom:1px solid var(--rule)}
.dl-step .sn{
  font-family:Georgia,serif;
  font-size:44px;
  font-style:italic;
  color:var(--red);
  line-height:1;
}
.dl-step h4{font-size:20px;font-weight:normal;margin-bottom:6px;font-style:italic}
.dl-step p{font-size:15px;color:var(--ink-soft)}

.dl-req{
  background:var(--ink);
  color:var(--paper);
  padding:60px 28px;
}
.dl-req-inner{max-width:var(--max);margin:0 auto}
.dl-req h2{font-size:32px;font-weight:normal;font-style:italic;margin-bottom:30px}
.dl-req h2 em{color:var(--accent);font-style:italic}
.req-table{display:grid;grid-template-columns:1fr 1fr;gap:0;border-top:1px solid rgba(255,255,255,.18)}
.req-row{
  padding:18px 0;
  border-bottom:1px solid rgba(255,255,255,.18);
  display:grid;
  grid-template-columns:auto 1fr;
  gap:14px;
  align-items:start;
  font-size:14px;
}
.req-row b{display:block;font-size:12px;letter-spacing:.18em;color:var(--accent);font-family:"Helvetica",sans-serif}
.req-row span{color:rgba(245,241,232,.85)}

/* ===== 响应式 ===== */
@media (max-width:880px){
  .mast-inner{grid-template-columns:auto;gap:12px}
  .masthead nav{justify-content:flex-start;flex-wrap:wrap}
  .issue{justify-self:start}
  .cover{grid-template-columns:1fr;gap:40px;padding:40px 20px 60px}
  .feature-row,.feature-row.reverse{grid-template-columns:1fr;gap:14px}
  .feature-num{font-size:46px}
  .columns-grid,.dossier-list,.toc-grid,.dl-platforms,.req-table{grid-template-columns:1fr 1fr}
  .toc-item,.dl-pf,.req-row{border-right:none}
  .pullquote p{font-size:32px}
  .colo-inner{flex-direction:column;gap:14px}
}
@media (max-width:540px){
  body{font-size:16px}
  .columns-grid,.dossier-list,.toc-grid,.dl-platforms,.req-table{grid-template-columns:1fr}
  .cover-text h1{font-size:36px}
  .feature-head h2,.columns-head h2,.dossier-head h2,.toc-head h2{font-size:30px}
  .dl-cover h1{font-size:38px}
}