/* ============================================================
   新质生产力 × 文旅 · 学习手册  |  样式表
   主题：浅色学术风 · 高级感
   ============================================================ */

/* ============ 变量 ============ */
:root{
  --ink:#12233d;            /* 主色：深 navy */
  --ink-2:#1d3557;
  --brand:#9b1c1c;          /* 强调：中国红 */
  --brand-2:#b83227;
  --gold:#b8860b;           /* 点缀：金 */
  --gold-soft:#c9a227;

  --bg:#f7f8fa;
  --bg-alt:#eef1f5;
  --surface:#ffffff;
  --text:#22303f;
  --muted:#5c6b7c;
  --line:#e4e8ef;
  --line-strong:#d5dce6;

  --shadow:0 10px 30px rgba(18,35,61,.10);
  --shadow-sm:0 3px 12px rgba(18,35,61,.06);
  --shadow-lg:0 24px 60px rgba(18,35,61,.16);

  --radius:15px;
  --radius-sm:11px;
  --maxw:1140px;
  --header-h:64px;

  --font-sans:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  --font-serif:"Songti SC","STSong","Source Han Serif SC","Noto Serif SC",Georgia,"Times New Roman",serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 16px)}
body{
  font-family:var(--font-sans);
  color:var(--text);background:var(--bg);line-height:1.78;font-size:16px;
  -webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;
}
a{color:var(--brand);text-decoration:none;transition:color .16s}
a:hover{text-decoration:underline}
::selection{background:rgba(155,28,28,.16);color:var(--ink)}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.muted{color:var(--muted)}
.center{text-align:center}
code{background:#f0ece4;color:#7a4b12;padding:1px 6px;border-radius:5px;font-size:.9em;font-family:"SFMono-Regular",Consolas,monospace}
img{max-width:100%}

/* 滚动渐显 */
.reveal{opacity:0;transform:translateY(20px);transition:opacity .7s cubic-bezier(.22,.7,.3,1),transform .7s cubic-bezier(.22,.7,.3,1)}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.reveal{opacity:1;transform:none;transition:none}html{scroll-behavior:auto}}

/* ============ 进度条 ============ */
.progress-bar{position:fixed;top:0;left:0;height:3px;width:0;background:linear-gradient(90deg,var(--brand),var(--gold));z-index:1000;transition:width .1s}

/* ============ 顶部导航 ============ */
.site-header{position:fixed;top:0;left:0;right:0;height:var(--header-h);background:rgba(255,255,255,.82);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line);z-index:900}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:100%;gap:16px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;color:var(--ink);text-decoration:none;flex:0 0 auto}
.brand:hover{text-decoration:none}
.brand-mark{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;padding:5px 10px;border-radius:9px;font-size:15px;letter-spacing:2px;box-shadow:0 4px 12px rgba(155,28,28,.28)}
.brand-text{font-family:var(--font-serif);font-size:17px;letter-spacing:.5px}
.nav{display:flex;gap:1px;flex-wrap:wrap;justify-content:flex-end}
.nav a{color:var(--ink);padding:7px 10px;border-radius:8px;font-size:13.5px;font-weight:500;transition:.18s;white-space:nowrap}
.nav a:hover{background:var(--bg-alt);text-decoration:none}
.nav a.active{background:var(--ink);color:#fff}
.nav-toggle{display:none;background:var(--ink);color:#fff;border:0;padding:8px 14px;border-radius:9px;font-size:14px;cursor:pointer}

/* ============ 右侧点状目录 ============ */
.dot-nav{position:fixed;right:20px;top:50%;transform:translateY(-50%);z-index:700;display:flex;flex-direction:column;gap:13px}
.dot-nav a{position:relative;width:10px;height:10px;border-radius:50%;border:1.5px solid var(--line-strong);background:transparent;transition:.22s}
.dot-nav a:hover{border-color:var(--brand);text-decoration:none}
.dot-nav a.active{background:var(--brand);border-color:var(--brand);transform:scale(1.25)}
.dot-nav a::after{content:attr(data-label);position:absolute;right:20px;top:50%;transform:translateY(-50%) translateX(6px);white-space:nowrap;background:var(--ink);color:#fff;font-size:12px;padding:4px 10px;border-radius:7px;opacity:0;pointer-events:none;transition:.18s;box-shadow:var(--shadow-sm)}
.dot-nav a:hover::after{opacity:1;transform:translateY(-50%) translateX(0)}
@media(max-width:1180px){.dot-nav{display:none}}

/* ============ HERO ============ */
.hero{position:relative;overflow:hidden;color:#fff;padding:130px 0 92px;
  background:
    radial-gradient(1100px 480px at 82% -12%, rgba(201,162,39,.20), transparent 62%),
    radial-gradient(820px 460px at 6% 112%, rgba(155,28,28,.26), transparent 60%),
    linear-gradient(135deg,#0e1e35 0%,#172e4c 56%,#281f3d 100%);
}
.hero::before{content:"";position:absolute;inset:0;pointer-events:none;
  background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);
  background-size:46px 46px;
  -webkit-mask-image:radial-gradient(120% 90% at 50% 0%,#000 30%,transparent 78%);
  mask-image:radial-gradient(120% 90% at 50% 0%,#000 30%,transparent 78%);
}
.hero-inner{position:relative;z-index:1}
.hero .eyebrow{display:inline-block;color:#e6cf9a;font-size:13px;letter-spacing:3px;font-weight:600;margin-bottom:16px;padding-bottom:6px;border-bottom:1px solid rgba(201,162,39,.4)}
.hero h1{font-family:var(--font-serif);font-size:clamp(32px,5.3vw,56px);line-height:1.18;font-weight:700;margin-bottom:20px;letter-spacing:1px}
.hero .lead{max-width:780px;font-size:18px;color:#d7e0ec;line-height:1.92}
.hero-tags{display:flex;gap:10px;flex-wrap:wrap;margin:24px 0 4px}
.hero-tags span{font-size:13px;color:#ecd9ac;border:1px solid rgba(201,162,39,.42);background:rgba(201,162,39,.08);padding:5px 14px;border-radius:20px;letter-spacing:.6px}
.hero-meta{margin-top:22px;display:flex;gap:12px;flex-wrap:wrap;align-items:center;color:#9fb2cb;font-size:14px}
.hero-meta .dot{color:var(--gold-soft)}
.hero-meta span{white-space:nowrap}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;align-items:center;margin-top:32px}
.cta{display:inline-block;background:linear-gradient(135deg,var(--gold-soft),var(--gold));color:#2a1c05;font-weight:700;padding:14px 30px;border-radius:30px;transition:.22s;box-shadow:0 10px 26px rgba(184,134,11,.35)}
.cta:hover{transform:translateY(-2px);text-decoration:none;box-shadow:0 16px 34px rgba(184,134,11,.5)}
.cta-ghost{background:transparent;color:#ecd9ac;border:1px solid rgba(201,162,39,.5);box-shadow:none}
.cta-ghost:hover{background:rgba(201,162,39,.12);color:#fff;box-shadow:none}

/* ============ 段落通用 ============ */
.section{padding:80px 0}
.section-alt{background:var(--bg-alt);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.sec-head{display:flex;align-items:flex-start;gap:16px;margin-bottom:20px}
.sec-no{flex:0 0 auto;font-family:Georgia,"Times New Roman",serif;font-size:46px;line-height:.9;font-weight:700;color:rgba(155,28,28,.16);min-width:62px;letter-spacing:-1px}
.sec-head h2{font-family:var(--font-serif);font-size:clamp(23px,3vw,31px);color:var(--ink);font-weight:700;line-height:1.32;padding-left:16px;border-left:3px solid var(--brand)}
.sec-eyebrow{display:block;font-family:var(--font-sans);font-size:12px;font-weight:600;letter-spacing:2.4px;text-transform:uppercase;color:var(--gold);margin-bottom:5px}
.sec-intro{max-width:900px;margin-bottom:36px;color:var(--muted);font-size:16.5px}
.sec-intro strong{color:var(--ink)}
.sub{font-family:var(--font-serif);font-size:20px;color:var(--ink);margin:38px 0 14px;font-weight:700;position:relative;padding-left:15px}
.sub::before{content:"";position:absolute;left:0;top:5px;bottom:5px;width:4px;background:linear-gradient(var(--brand),var(--gold));border-radius:2px}

/* ============ 导读 ============ */
.lesson-box{background:linear-gradient(180deg,#fff,#fdfaf3);border:1px solid #ecdfc4;border-radius:var(--radius);padding:24px 28px;margin:6px 0 22px;box-shadow:var(--shadow-sm)}
.lesson-box h3{font-family:var(--font-serif);color:var(--ink);font-size:18px;margin-bottom:12px}
.lesson-box ol{padding-left:22px;color:var(--muted);font-size:15px}
.lesson-box li{margin-bottom:9px}
.lesson-box strong{color:var(--brand)}
.map-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.map-card{display:block;position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;transition:.22s;box-shadow:var(--shadow-sm);overflow:hidden}
.map-card::after{content:"";position:absolute;left:0;top:0;height:100%;width:3px;background:var(--brand);transform:scaleY(0);transform-origin:top;transition:.25s}
.map-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);text-decoration:none;border-color:#cbd6e3}
.map-card:hover::after{transform:scaleY(1)}
.map-idx{display:inline-block;font-family:Georgia,serif;font-size:13px;font-weight:700;color:var(--gold);letter-spacing:1px;margin-bottom:6px}
.map-card h3{font-family:var(--font-serif);color:var(--ink);font-size:17px;margin-bottom:6px}
.map-card p{color:var(--muted);font-size:14px}
.map-card.hl{border-color:#e7b9b9;background:linear-gradient(180deg,#fff,#fdf3f3)}
.map-card.hl::after{background:var(--gold)}

/* ============ 提示框 ============ */
.callout{border-radius:12px;padding:16px 20px;margin:22px 0;font-size:15px;line-height:1.86;border:1px solid transparent;border-left-width:4px}
.callout strong{color:var(--ink)}
.callout-tip{background:#fff8ea;border-color:#f0dca8;border-left-color:var(--gold);color:#6b4e12}
.callout-note{background:#eef3fa;border-color:#cfe0f3;border-left-color:#3b6ea5;color:#254763}
.callout-warn{background:#fdf1f0;border-color:#f0c3bf;border-left-color:var(--brand);color:#7a2a22}
.callout em{font-style:normal;color:var(--brand);font-weight:600}
.callout-note em{color:#254763}

/* ============ 定义块 ============ */
.definition{position:relative;background:var(--surface);border:1px solid var(--line);border-left:6px solid var(--brand);border-radius:var(--radius);padding:26px 30px 26px 34px;box-shadow:var(--shadow-sm);margin-bottom:32px;overflow:hidden}
.definition::before{content:"“";position:absolute;right:22px;top:-14px;font-family:Georgia,serif;font-size:120px;color:rgba(155,28,28,.07);line-height:1}
.def-label{font-size:12.5px;color:var(--brand);font-weight:700;letter-spacing:1.4px;margin-bottom:12px;text-transform:uppercase}
.definition blockquote{font-family:var(--font-serif);font-size:18.5px;line-height:2;color:var(--ink);border:0;padding:0;position:relative}
.definition blockquote strong{color:var(--brand)}

.two-col{display:grid;grid-template-columns:1fr 1fr;gap:34px;margin-top:10px}

/* ============ 理论谱系（链条） ============ */
.chain{display:flex;align-items:stretch;gap:10px;margin:18px 0 10px;flex-wrap:wrap}
.chain-step{flex:1 1 0;min-width:200px;background:var(--surface);border:1px solid var(--line);border-top:4px solid var(--gold);border-radius:12px;padding:18px;box-shadow:var(--shadow-sm);transition:.2s}
.chain-step:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.chain-step h4{font-family:var(--font-serif);color:var(--ink);font-size:16px;margin:9px 0 6px}
.chain-step p{color:var(--muted);font-size:14px}
.chain-era{display:inline-block;font-size:12px;font-weight:700;color:var(--brand);background:#fbeaea;padding:2px 10px;border-radius:20px}
.chain-arrow{align-self:center;color:var(--gold);font-size:22px;font-weight:700}

/* ============ 时间线 ============ */
.timeline{position:relative;margin-top:26px;padding-left:8px}
.timeline::before{content:"";position:absolute;left:13px;top:8px;bottom:8px;width:2px;background:linear-gradient(var(--brand),var(--gold))}
.tl-item{position:relative;padding:0 0 24px 46px}
.tl-dot{position:absolute;left:6px;top:5px;width:16px;height:16px;border-radius:50%;background:var(--brand);border:3px solid #fff;box-shadow:0 0 0 2px var(--brand)}
.tl-body{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:15px 19px;box-shadow:var(--shadow-sm);transition:.2s}
.tl-body:hover{border-color:#cbd6e3}
.tl-date{display:inline-block;font-size:12px;font-weight:700;color:#fff;background:var(--gold);padding:2px 11px;border-radius:20px;margin-bottom:8px;letter-spacing:.5px}
.tl-body h4{font-family:var(--font-serif);color:var(--ink);font-size:17px;margin-bottom:4px}
.tl-body p{color:var(--muted);font-size:14.5px}

/* ============ 表格 ============ */
.table-wrap{overflow-x:auto;margin:16px 0 6px;border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow-sm);background:var(--surface)}
.data-table{width:100%;border-collapse:collapse;font-size:14.5px;min-width:580px}
.data-table th{background:var(--ink);color:#fff;text-align:left;padding:13px 16px;font-weight:600;font-size:13.5px;letter-spacing:.3px}
.data-table td{padding:12px 16px;border-top:1px solid var(--line);color:var(--muted);vertical-align:top;line-height:1.7}
.data-table tbody tr:nth-child(even){background:#fafbfd}
.data-table tbody tr:hover{background:#f4f7fb}
.data-table td:first-child{color:var(--ink);font-weight:600;white-space:nowrap}
.src-note{font-size:13px;color:var(--muted);margin-top:4px;font-style:italic}

/* ============ 要素卡片 ============ */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:14px}
.feat-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow-sm);transition:.22s;position:relative;overflow:hidden}
.feat-card::before{content:"";position:absolute;left:0;top:0;width:100%;height:3px;background:linear-gradient(90deg,var(--ink),var(--brand));transform:scaleX(0);transform-origin:left;transition:.3s}
.feat-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.feat-card:hover::before{transform:scaleX(1)}
.feat-ico{width:48px;height:48px;border-radius:13px;background:linear-gradient(135deg,var(--ink),#33507e);color:#fff;display:flex;align-items:center;justify-content:center;font-size:20px;font-weight:800;margin-bottom:14px;font-family:var(--font-serif)}
.feat-card h4{font-family:var(--font-serif);color:var(--ink);font-size:18px;margin-bottom:8px}
.feat-card p{color:var(--muted);font-size:14.5px}
.pill-row{display:flex;flex-wrap:wrap;gap:10px;margin:14px 0 10px}
.pill{background:var(--bg-alt);border:1px solid var(--line);color:var(--ink);padding:7px 17px;border-radius:30px;font-size:14px;font-weight:600}
.pill-accent{background:var(--ink);color:#fff;border-color:var(--ink)}

/* ============ 手风琴 ============ */
.accordion{margin-top:10px}
.acc-item{border:1px solid var(--line);border-radius:12px;background:var(--surface);margin-bottom:12px;overflow:hidden;box-shadow:var(--shadow-sm);transition:.2s}
.acc-item.open{border-color:#e7b9b9;box-shadow:var(--shadow)}
.acc-head{width:100%;text-align:left;background:none;border:0;padding:18px 20px;font-size:16.5px;font-weight:700;color:var(--ink);cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px;font-family:var(--font-sans)}
.acc-head:hover{background:#fafbfd}
.acc-sign{font-size:22px;color:var(--brand);transition:.25s;font-weight:400;flex:0 0 auto}
.acc-item.open .acc-sign{transform:rotate(45deg)}
.acc-body{max-height:0;overflow:hidden;transition:max-height .32s ease}
.acc-body p{padding:0 20px 14px;color:var(--muted);font-size:15px}
.acc-body p:first-child{padding-top:2px}
.acc-src{margin:0 20px 18px;font-size:12.5px;color:var(--muted);border-top:1px dashed var(--line);padding-top:9px;font-style:italic}

/* ============ 路径卡片 ============ */
.path-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(290px,1fr));gap:18px;margin-top:14px}
.path-card{background:var(--surface);border:1px solid var(--line);border-top:4px solid var(--brand);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm);transition:.22s}
.path-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.path-tag{font-size:12px;font-weight:700;color:#fff;background:linear-gradient(135deg,var(--gold-soft),var(--gold));padding:3px 11px;border-radius:20px}
.path-card h3{font-family:var(--font-serif);color:var(--ink);font-size:18px;margin:12px 0 8px}
.path-card p{color:var(--muted);font-size:14.5px}
.path-link{margin-top:10px;color:var(--brand);font-weight:600;font-size:14px}

/* ============ 文旅应用 ============ */
.highlight-box{background:linear-gradient(135deg,#fff,#fdf3f3);border:1px solid #f0c9c9;border-radius:var(--radius);padding:26px 30px;margin:6px 0 30px;box-shadow:var(--shadow-sm);position:relative;overflow:hidden}
.highlight-box::before{content:"";position:absolute;right:-40px;top:-40px;width:160px;height:160px;border-radius:50%;background:radial-gradient(circle,rgba(184,134,11,.14),transparent 70%)}
.highlight-box h3{font-family:var(--font-serif);color:var(--brand);font-size:20px;margin-bottom:10px}
.highlight-box p{color:var(--text);font-size:15.5px;position:relative}
.highlight-box em{font-style:normal;color:var(--brand);font-weight:700}
.tour-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.tour-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm);transition:.22s}
.tour-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#d6deea}
.tour-card h4{font-family:var(--font-serif);color:var(--ink);font-size:17px;margin-bottom:12px;padding-bottom:10px;border-bottom:1px dashed var(--line)}
.tour-card p{font-size:14px;margin-bottom:10px;line-height:1.8}
.t-what{color:var(--muted)}
.t-why{color:var(--text)}
.t-why strong{color:var(--brand)}
.t-tip strong{color:var(--gold)}

/* ============ 案例 ============ */
.case-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.case-card{display:flex;flex-direction:column;width:100%;text-align:left;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow-sm);transition:.22s;cursor:pointer;font:inherit;color:inherit;position:relative;overflow:hidden}
.case-card::before{content:"";position:absolute;left:0;bottom:0;width:100%;height:3px;background:linear-gradient(90deg,var(--brand),var(--gold));transform:scaleX(0);transform-origin:left;transition:.3s}
.case-card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:#dcc6a4}
.case-card:hover::before{transform:scaleX(1)}
.case-card:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
.case-cat{display:inline-block;font-size:12px;font-weight:700;color:var(--brand);background:#fbeaea;padding:3px 11px;border-radius:20px;margin-bottom:10px}
.case-card h3{font-family:var(--font-serif);color:var(--ink);font-size:17px;margin-bottom:8px}
.case-card p{color:var(--muted);font-size:14.5px}
.case-more{margin-top:auto;padding-top:12px;font-size:13.5px;font-weight:700;color:var(--gold)}
.case-card:hover .case-more{color:var(--brand)}

/* ============ 名词解释 ============ */
.glossary{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.glossary details{background:var(--surface);border:1px solid var(--line);border-radius:12px;box-shadow:var(--shadow-sm);overflow:hidden;transition:.2s}
.glossary details[open]{border-color:#e7b9b9;box-shadow:var(--shadow)}
.glossary summary{cursor:pointer;padding:15px 18px;font-weight:700;color:var(--ink);font-size:15.5px;list-style:none;position:relative;padding-right:44px}
.glossary summary::-webkit-details-marker{display:none}
.glossary summary::after{content:"+";position:absolute;right:18px;top:16px;color:var(--brand);font-size:20px;font-weight:400;transition:.2s}
.glossary details[open] summary{border-bottom:1px solid var(--line)}
.glossary details[open] summary::after{content:"–"}
.glossary p{padding:12px 18px 16px;color:var(--muted);font-size:14.5px}
.glossary p a{font-weight:600}
.glossary .en{display:block;font-weight:400;font-style:italic;color:var(--muted);font-size:12.5px;margin-top:3px;letter-spacing:.2px}

/* ============ 学术进阶 ============ */
.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:14px}
.tool-card{background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:18px 20px;box-shadow:var(--shadow-sm);transition:.2s}
.tool-card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.tool-card h4{font-family:var(--font-serif);color:var(--brand);font-size:16px;margin-bottom:6px}
.tool-card p{color:var(--muted);font-size:14px}
.design-box{display:grid;gap:12px;margin-top:14px}
.design-item{display:flex;gap:14px;align-items:flex-start;background:var(--surface);border:1px solid var(--line);border-radius:12px;padding:16px 20px;box-shadow:var(--shadow-sm)}
.design-item p{color:var(--muted);font-size:14.5px}
.d-tag{flex:0 0 auto;font-size:12px;font-weight:700;color:#fff;padding:3px 11px;border-radius:20px;margin-top:2px}
.d-quant{background:#1f6feb}
.d-qual{background:#2e9e5b}
.d-mix{background:#7c4ddb}
.research-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:14px}
.research-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow-sm)}
.research-card h3{font-family:var(--font-serif);color:var(--ink);font-size:18px;margin-bottom:12px}
.research-card ul,.research-card ol{padding-left:20px;color:var(--muted);font-size:14.5px}
.research-card li{margin-bottom:9px}
.research-card strong{color:var(--brand)}

/* ============ 参考来源 ============ */
.ref-list{padding-left:22px;color:var(--muted);font-size:15px;line-height:1.95;margin-bottom:6px}
.ref-list li{margin-bottom:8px}
.ref-list a{color:var(--brand);font-weight:600}
.ref-list a:hover{text-decoration:underline}
.read-list li{margin-bottom:10px}
.read-list a{color:var(--brand);font-weight:600}
.read-list a::after{content:" ↗";font-size:.85em;color:var(--muted)}
.cite-box{margin-top:26px;background:var(--surface);border:1px solid var(--line);border-left:4px solid var(--gold);border-radius:12px;padding:20px 24px;box-shadow:var(--shadow-sm)}
.cite-box h4{font-family:var(--font-serif);color:var(--ink);font-size:16px;margin-bottom:8px}
.cite-box p{color:var(--muted);font-size:14.5px}
.cite-sample{font-family:var(--font-serif);background:#f6f7fa;border-radius:8px;padding:10px 14px;margin-top:8px;color:var(--ink)!important;font-size:14px;line-height:1.7}

/* ============ 页脚 ============ */
.site-footer{background:var(--ink);color:#c3d0e0;padding:44px 0 38px;text-align:center;border-top:3px solid var(--gold)}
.foot-title{color:#fff;font-family:var(--font-serif);font-weight:700;letter-spacing:.5px;margin-bottom:8px;font-size:16px}
.site-footer .muted{color:#8195b3;font-size:14px}
.foot-nav{display:flex;flex-wrap:wrap;gap:6px 18px;justify-content:center;margin-top:18px;padding-top:18px;border-top:1px solid rgba(255,255,255,.1)}
.foot-nav a{color:#aebfd6;font-size:13.5px}
.foot-nav a:hover{color:#fff;text-decoration:none}

/* ============ 回到顶部 ============ */
.to-top{position:fixed;right:22px;bottom:22px;width:48px;height:48px;border-radius:50%;background:var(--ink);color:#fff;border:0;font-size:20px;cursor:pointer;opacity:0;visibility:hidden;transition:.25s;box-shadow:var(--shadow);z-index:800}
.to-top.show{opacity:1;visibility:visible}
.to-top:hover{background:var(--brand);transform:translateY(-2px)}

/* ============ 案例弹窗 ============ */
.modal{position:fixed;inset:0;z-index:1200;display:none;align-items:flex-start;justify-content:center;padding:6vh 18px 4vh}
.modal.open{display:flex}
.modal-backdrop{position:absolute;inset:0;background:rgba(12,20,36,.58);backdrop-filter:blur(3px)}
.modal-panel{position:relative;background:var(--surface);border-radius:18px;max-width:780px;width:100%;max-height:88vh;overflow-y:auto;padding:32px 36px 28px;box-shadow:var(--shadow-lg);animation:modalIn .24s ease}
@keyframes modalIn{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}
.modal-close{position:absolute;top:16px;right:18px;width:36px;height:36px;border:none;background:#f1f3f7;color:var(--ink);border-radius:50%;font-size:20px;line-height:1;cursor:pointer;transition:.15s}
.modal-close:hover{background:var(--brand);color:#fff}
.modal-panel h3{font-family:var(--font-serif);color:var(--ink);font-size:23px;margin:8px 0 18px;padding-right:34px;line-height:1.4}
.modal-body{color:var(--text);font-size:15.5px;line-height:1.88}
.modal-body .case-lead{font-size:16px;color:var(--ink);font-weight:600;margin-bottom:16px;padding:12px 16px;background:#f7f8fb;border-left:3px solid var(--brand);border-radius:0 8px 8px 0}
.modal-body h4{font-family:var(--font-serif);color:var(--brand);font-size:16.5px;margin:22px 0 8px}
.modal-body p{margin-bottom:10px;color:var(--muted)}
.modal-body strong{color:var(--ink)}
.modal-src{margin-top:20px;font-size:12.5px;border-top:1px dashed var(--line);padding-top:12px}

/* ============ 响应式 ============ */
@media(max-width:1024px){
  .nav{display:none;position:absolute;top:var(--header-h);right:0;left:0;background:#fff;flex-direction:column;padding:10px;border-bottom:1px solid var(--line);box-shadow:var(--shadow)}
  .nav.open{display:flex}
  .nav a{padding:12px 16px;font-size:15px}
  .nav-toggle{display:block}
}
@media(max-width:960px){
  .map-grid,.feat-grid,.tour-grid,.case-grid,.research-grid,.tool-grid{grid-template-columns:1fr 1fr}
  .glossary{grid-template-columns:1fr}
  .two-col{grid-template-columns:1fr;gap:20px}
  .sec-no{font-size:38px;min-width:48px}
}
@media(max-width:680px){
  body{font-size:15.5px}
  .map-grid,.feat-grid,.tour-grid,.case-grid,.research-grid,.tool-grid{grid-template-columns:1fr}
  .chain{flex-direction:column}
  .chain-arrow{transform:rotate(90deg);align-self:center}
  .hero{padding:104px 0 66px}
  .hero-tags span{font-size:12px}
  .section{padding:56px 0}
  .sec-no{font-size:32px;min-width:40px}
  .sec-head{gap:10px}
  .modal-panel{padding:24px 20px 22px}
}

/* ============ 打印 ============ */
@media print{
  .site-header,.dot-nav,.progress-bar,.to-top,.nav-toggle,.cta,.modal{display:none!important}
  body{background:#fff;font-size:12pt}
  .section{padding:18px 0;page-break-inside:avoid}
  .section-alt{background:#fff;border:0}
  .hero{background:#fff!important;color:#000!important;padding:0 0 18px}
  .hero h1,.hero .eyebrow,.hero .lead,.hero-tags span,.hero-meta{color:#000!important}
  .reveal{opacity:1!important;transform:none!important}
  a{color:#000;text-decoration:underline}
  .glossary details{break-inside:avoid}
  .glossary details p{display:block!important}
}