/* 袋鼠数据・海洋产业数据服务白皮书 —— 讲演站
   双模式：放映（横向 scroll-snap）/ 长文（纵向滚动） */

:root{
  --navy:#0B1D3A;
  --navy-deep:#061226;
  --paper:#F4F6F9;
  --card:#FFFFFF;
  --ink:#0E1E33;
  --ink-2:#33465F;
  --muted:#5B6B80;
  --line:#D8E0E9;
  --cyan:#127FB0;
  --gold:#9A6A0B;
  --coral:#B23B3B;
  --blue:#2563EB;
  --green:#0F7A5A;
  --purple:#6D4AC0;
  --amber:#B45309;
  --radius:8px;
  --stage:1200px;
  --pad-x:clamp(20px,6vw,96px);
  --font-sans:"PingFang SC","Noto Sans CJK SC","Noto Sans SC","Hiragino Sans GB","Microsoft YaHei",system-ui,sans-serif;
  --font-display:"Noto Serif CJK SC","Noto Serif SC","Songti SC","Source Han Serif SC",Georgia,serif;
  --font-mono:"JetBrains Mono","SFMono-Regular",Consolas,monospace;
}

/* ---------- 主题（由 app.js 依据当前页切换） ---------- */
body[data-theme="ink"]{
  --bg:var(--navy);
  --fg:#EDF3FA;
  --fg-2:#C3D2E4;
  --muted-fg:#9FB2C8;
  --line-fg:#22344C;
  --card-bg:#10233F;
  --card-line:#213755;
  --accent:var(--d-cyan,#7DD3FC);
  --accent-2:#FDE68A;
  --kicker-bg:rgba(125,211,252,.12);
  --kicker-line:rgba(125,211,252,.35);
  --topbar-bg:rgba(6,18,38,.92);
  --topbar-fg:#EDF3FA;
}
body[data-theme="paper"]{
  --bg:var(--paper);
  --fg:var(--ink);
  --fg-2:var(--ink-2);
  --muted-fg:var(--muted);
  --line-fg:var(--line);
  --card-bg:#FFFFFF;
  --card-line:#DDE4EC;
  --accent:var(--cyan);
  --accent-2:var(--gold);
  --kicker-bg:rgba(18,127,176,.08);
  --kicker-line:rgba(18,127,176,.3);
  --topbar-bg:rgba(11,29,58,.96);
  --topbar-fg:#EDF3FA;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:var(--font-sans);
  color:var(--fg);
  background:var(--bg);
  transition:background-color .35s ease,color .35s ease;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}

/* ---------- 顶栏与底栏 ---------- */
.topbar{
  position:fixed;inset:0 0 auto 0;z-index:40;
  height:56px;display:flex;align-items:center;justify-content:space-between;
  padding:0 clamp(14px,3vw,28px);
  background:var(--topbar-bg);backdrop-filter:blur(8px);
  border-bottom:1px solid rgba(255,255,255,.08);
  color:var(--topbar-fg);
}
.brand{display:flex;align-items:baseline;gap:10px;min-width:0}
.brand b{font-family:var(--font-display);font-size:17px;letter-spacing:.5px;white-space:nowrap}
.brand span{font-size:12px;color:#A9BCD1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.top-actions{display:flex;gap:8px}
.btn{
  appearance:none;border:1px solid rgba(255,255,255,.18);
  background:rgba(255,255,255,.06);color:#EDF3FA;
  font:inherit;font-size:12.5px;line-height:1;
  padding:10px 12px;border-radius:6px;cursor:pointer;
  min-height:36px;display:inline-flex;align-items:center;gap:6px;
  transition:background-color .2s ease,border-color .2s ease;
}
.btn:hover{background:rgba(255,255,255,.13);border-color:rgba(255,255,255,.3)}
.btn:focus-visible{outline:2px solid #7DD3FC;outline-offset:2px}
.btn--primary{background:#EDF3FA;color:#0B1D3A;border-color:#EDF3FA;font-weight:600}
.btn--primary:hover{background:#fff}

.controls{
  position:fixed;inset:auto 0 0 0;z-index:40;
  height:56px;display:flex;align-items:center;justify-content:center;gap:10px;
  background:var(--topbar-bg);backdrop-filter:blur(8px);
  border-top:1px solid rgba(255,255,255,.08);color:var(--topbar-fg);
  padding:0 14px;
}
.controls .navbtn{width:40px;height:40px;justify-content:center;padding:0;font-size:16px}
.counter{font-family:var(--font-mono);font-size:12px;letter-spacing:.08em;color:#A9BCD1;min-width:64px;text-align:center}
.counter b{color:#EDF3FA;font-weight:600}
.chapter-mark{font-size:12px;color:#8FA3BA;max-width:32vw;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.progress{position:fixed;left:0;right:0;bottom:55px;height:2px;background:rgba(255,255,255,.12);z-index:41}
.progress i{display:block;height:100%;width:0;background:linear-gradient(90deg,#7DD3FC,#FDE68A);transition:width .25s ease}

/* ---------- 章节导航条（桌面常驻，强化层次） ---------- */
.chapterbar{
  position:fixed;top:56px;left:0;right:0;z-index:39;height:40px;display:flex;
  background:var(--topbar-bg);backdrop-filter:blur(8px);
  border-bottom:1px solid rgba(255,255,255,.08);
}
.chapterbar button{
  flex:1;appearance:none;background:none;border:0;
  border-right:1px solid rgba(255,255,255,.06);
  color:#8FA3BA;font:inherit;font-size:12.5px;letter-spacing:.04em;
  cursor:pointer;display:flex;align-items:center;justify-content:center;gap:6px;
  padding:0 8px;position:relative;white-space:nowrap;overflow:hidden;
}
.chapterbar button:last-child{border-right:0}
.chapterbar button:hover{color:#C3D2E4;background:rgba(255,255,255,.04)}
.chapterbar button[aria-current="true"]{color:#7DD3FC;font-weight:650}
.chapterbar button[aria-current="true"]::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:#7DD3FC}
.chapterbar button:focus-visible{outline:2px solid #7DD3FC;outline-offset:-2px}

/* ---------- 放映模式（默认） ---------- */
#deck{
  display:flex;flex-direction:row;flex-wrap:nowrap;
  width:100%;height:100dvh;overflow-x:auto;overflow-y:hidden;
  scroll-snap-type:x mandatory;
  scrollbar-width:none;
}
#deck::-webkit-scrollbar{display:none}
.slide{
  position:relative;flex:0 0 100%;width:100%;height:100dvh;
  scroll-snap-align:center;scroll-snap-stop:always;
  display:grid;align-items:center;
  padding:132px var(--pad-x) 84px;
  background:var(--bg);color:var(--fg);
  overflow-x:hidden;overflow-y:auto;isolation:isolate;
  scrollbar-width:thin;
}
.slide::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(1200px 600px at 78% -10%,rgba(125,211,252,.10),transparent 60%);
  opacity:0;transition:opacity .4s ease;
}
.slide--ink::before{opacity:1}
.slide--paper::before{background:radial-gradient(1000px 520px at 82% -12%,rgba(18,127,176,.06),transparent 62%);opacity:1}
.slide--paper{background:var(--paper);color:var(--ink)}

.slide-inner{width:100%;max-width:var(--stage);margin:0 auto;position:relative}

/* ---------- 版式单元 ---------- */
.kicker{
  display:inline-flex;align-items:center;gap:9px;
  font-size:13px;letter-spacing:.12em;
  color:var(--accent);margin:0 0 20px;font-weight:700;
  padding:7px 13px;border-radius:6px;
  background:var(--kicker-bg);border:1px solid var(--kicker-line);
}
.kicker::before{content:"";width:8px;height:8px;border-radius:2px;background:currentColor}
h2{
  position:relative;
  font-family:var(--font-display);
  font-size:clamp(30px,3.6vw,54px);
  line-height:1.18;margin:0 0 20px;padding-bottom:16px;letter-spacing:.01em;font-weight:700;
}
h2::after{content:"";position:absolute;left:0;bottom:0;width:64px;height:3px;background:var(--accent-2)}
h2 .thin{font-weight:400;opacity:.65}
.lead{
  font-size:clamp(15px,1.3vw,19px);line-height:1.75;color:var(--fg-2);
  max-width:62ch;margin:0 0 28px;
}
.note{font-size:clamp(13px,1.05vw,15px);line-height:1.7;color:var(--muted-fg);max-width:68ch}
.note--band{max-width:none;background:var(--card-bg);border:1px solid var(--card-line);border-left:3px solid var(--accent);border-radius:var(--radius);padding:12px 16px}
.footnote{margin-top:22px;font-size:11.5px;line-height:1.6;color:var(--muted-fg)}
.footnote a{color:var(--accent);text-decoration:none;border-bottom:1px solid currentColor}
.footnote a:hover{opacity:.8}

.grid{display:grid;gap:14px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.card{
  background:var(--card-bg);border:1px solid var(--card-line);
  border-radius:var(--radius);padding:18px 18px 16px;
}
.card h3{margin:0 0 8px;font-size:clamp(15px,1.25vw,17.5px);font-weight:650;letter-spacing:.01em}
.card p{margin:0;font-size:clamp(13px,1.05vw,14.8px);line-height:1.65;color:var(--fg-2)}
.card .tag{
  display:inline-block;font-size:11px;letter-spacing:.06em;color:var(--accent);
  border:1px solid currentColor;border-radius:4px;padding:3px 6px;margin-bottom:10px;opacity:.9;
}
.stat{padding:18px;display:flex;flex-direction:column;gap:4px}
.stat .num{
  font-family:var(--font-display);font-size:clamp(30px,3.6vw,52px);line-height:1;font-weight:700;
  color:var(--accent);font-variant-numeric:tabular-nums;
}
.stat .num small{font-size:.42em;font-weight:600;margin-left:4px}
.stat .label{font-size:12.5px;color:var(--muted-fg);letter-spacing:.04em}
.stat .desc{font-size:12.5px;line-height:1.55;color:var(--fg-2);margin-top:6px}

ul.clean{list-style:none;margin:0;padding:0}
ul.clean li{
  position:relative;padding:10px 0 10px 18px;font-size:clamp(13.5px,1.1vw,15.5px);
  line-height:1.65;color:var(--fg-2);border-bottom:1px solid var(--line-fg);
}
ul.clean li:last-child{border-bottom:0}
ul.clean li::before{content:"";position:absolute;left:0;top:19px;width:6px;height:6px;border-radius:50%;background:var(--accent);opacity:.8}
ul.clean strong{color:var(--fg);font-weight:650}
ul.clean a{color:var(--accent);text-decoration:none;border-bottom:1px solid currentColor}
ul.clean a:hover{opacity:.8}

.chain{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;counter-reset:step}
.chain .step{
  position:relative;background:var(--card-bg);border:1px solid var(--card-line);
  border-radius:var(--radius);padding:16px 14px 14px;
}
.chain .step::before{
  counter-increment:step;content:counter(step,decimal-leading-zero);
  font-family:var(--font-mono);font-size:11px;color:var(--accent);letter-spacing:.1em;
  display:block;margin-bottom:8px;
}
.chain .step h4{margin:0 0 6px;font-size:14.5px;font-weight:650}
.chain .step p{margin:0;font-size:12.5px;line-height:1.6;color:var(--fg-2)}
.chain .step:not(:last-child)::after{
  content:"→";position:absolute;right:-9px;top:50%;transform:translateY(-50%);
  color:var(--muted-fg);font-size:13px;z-index:2;
}

.table-wrap{overflow-x:auto;border:1px solid var(--card-line);border-radius:var(--radius);background:var(--card-bg)}
table{width:100%;border-collapse:collapse;font-size:clamp(12px,1vw,13.5px)}
th,td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line-fg);vertical-align:top;line-height:1.5}
th{font-weight:650;color:var(--fg);background:rgba(125,211,252,.07);white-space:nowrap}
td{color:var(--fg-2)}
tr:last-child td{border-bottom:0}
td:first-child{color:var(--fg);font-weight:600;white-space:nowrap}

.figure{margin:0;background:#fff;border:1px solid var(--card-line);border-radius:var(--radius);padding:10px;position:relative}
.figure img{display:block;width:100%;height:auto;max-height:58vh;object-fit:contain;margin:0 auto;cursor:zoom-in}
.figure figcaption{font-size:11.5px;color:var(--muted);padding:8px 4px 2px;text-align:center}
.figure::after{content:"点击放大";position:absolute;top:8px;right:8px;font-size:10.5px;letter-spacing:.05em;color:var(--muted);background:var(--paper);border:1px solid var(--card-line);border-radius:4px;padding:2px 7px;pointer-events:none;opacity:.85}
.figure--dark{background:var(--navy);border-color:#213755}
.figure--dark figcaption{color:#9FB2C8}
.figure--dark::after{color:#9FB2C8;background:#12294a;border-color:#213755}
.figure--bare{background:transparent;border:0;padding:0;border-radius:0}
.figure--bare::after{display:none}

.split{display:grid;grid-template-columns:1.05fr .95fr;gap:clamp(18px,3vw,44px);align-items:center}
.split--rev{grid-template-columns:.95fr 1.05fr}
.split--fig{grid-template-columns:1.3fr .7fr}
.split--fig.split--rev{grid-template-columns:.7fr 1.3fr}

.metrics{display:flex;flex-wrap:wrap;gap:clamp(18px,3vw,48px);margin-top:8px}
.metric .v{font-family:var(--font-display);font-size:clamp(26px,3vw,44px);line-height:1;font-weight:700;color:var(--accent);font-variant-numeric:tabular-nums}
.metric .k{font-size:12px;color:var(--muted-fg);margin-top:6px;letter-spacing:.03em}
.slide--compact .card{padding:14px 16px}
.slide--compact .metric .v{font-size:clamp(22px,2.4vw,34px)}
.slide--compact .metrics{gap:18px}
.card p a{color:var(--accent);text-decoration:none;border-bottom:1px solid currentColor}
.card p a:hover{opacity:.8}

/* 自有产权数据 hero（放大独立） */
.asset-hero{
  position:relative;background:var(--card-bg);
  border:1px solid var(--kicker-line);border-radius:var(--radius);
  padding:26px 28px;overflow:hidden;
}
.asset-hero::before{
  content:"";position:absolute;inset:0;pointer-events:none;
  background:radial-gradient(640px 220px at 10% 0%,var(--kicker-bg),transparent 70%);
}
.asset-hero .tag{
  position:relative;display:inline-block;font-size:11.5px;letter-spacing:.06em;
  color:var(--accent);border:1px solid currentColor;border-radius:4px;
  padding:4px 8px;margin-bottom:8px;font-weight:600;
}
.asset-num{
  position:relative;display:flex;align-items:baseline;gap:4px;flex-wrap:wrap;
  font-family:var(--font-display);font-weight:700;
  font-size:clamp(44px,6.5vw,88px);line-height:1;color:var(--accent);
  font-variant-numeric:tabular-nums;margin:8px 0 14px;
}
.asset-num small{font-size:.34em;font-weight:600;margin-left:2px}
.asset-sep{width:1px;height:.55em;background:var(--line-fg);margin:0 16px;align-self:center}
.asset-desc{position:relative;margin:0;font-size:clamp(13px,1.15vw,16px);line-height:1.7;color:var(--fg-2);max-width:74ch}
.asset-desc strong{color:var(--fg)}
.split .asset-num{font-size:clamp(34px,4.4vw,62px)}
.split .asset-hero{padding:20px 22px}

/* 章节导览 */
.tiles{display:grid;grid-template-columns:repeat(5,1fr);gap:10px;margin-top:8px}
.tile{
  background:var(--card-bg);border:1px solid var(--card-line);border-radius:var(--radius);
  padding:16px 14px;display:flex;flex-direction:column;gap:8px;min-height:140px;
}
.tile .no{font-family:var(--font-mono);font-size:11px;color:var(--accent);letter-spacing:.1em}
.tile h3{margin:0;font-size:15px;font-weight:650;line-height:1.4}
.tile p{margin:0;font-size:12px;color:var(--fg-2);line-height:1.55}

/* 封面 */
.cover .slide-inner{max-width:1080px}
.cover-title{
  font-family:var(--font-display);font-weight:700;
  font-size:clamp(38px,6vw,86px);line-height:1.12;margin:0 0 18px;letter-spacing:.02em;
}
.cover-sub{font-size:clamp(15px,1.6vw,21px);color:var(--fg-2);letter-spacing:.08em;margin:0 0 36px}
.cover-meta{display:flex;flex-wrap:wrap;gap:10px 26px;font-size:13px;color:var(--muted-fg);letter-spacing:.04em}
.cover-rule{width:72px;height:2px;background:var(--accent-2);margin:0 0 30px}
.hint{
  display:inline-flex;align-items:center;gap:8px;margin-top:44px;
  font-size:12px;color:var(--muted-fg);border:1px solid var(--line-fg);
  border-radius:999px;padding:8px 14px;
}
.hint kbd{
  font-family:var(--font-mono);font-size:11px;border:1px solid var(--line-fg);
  border-bottom-width:2px;border-radius:4px;padding:1px 5px;color:var(--fg-2);background:var(--card-bg);
}

/* 封底 */
.closing-quote{
  font-family:var(--font-display);font-size:clamp(22px,2.6vw,38px);
  line-height:1.5;margin:0 0 28px;max-width:22ch;
}
.closing-quote em{font-style:normal;color:var(--accent-2)}

/* ---------- 长文模式 ---------- */
body.long #deck{
  display:block;width:100%;height:auto;overflow:visible;
  scroll-snap-type:none;
}
body.long .slide{
  display:block;height:auto;min-height:auto;width:100%;
  padding:120px var(--pad-x) 56px;
  overflow:visible;scroll-snap-align:none;
  border-bottom:1px solid var(--line-fg);
}
body.long .slide:last-child{border-bottom:0;padding-bottom:110px}
body.long .slide-inner{max-width:920px}
body.long .figure img{max-height:none}
body.long .tiles{grid-template-columns:repeat(3,1fr)}
body.long .chain{grid-template-columns:repeat(2,1fr)}
body.long .chain .step:not(:last-child)::after{display:none}
body.long .progress{bottom:55px}

/* ---------- 目录抽屉 ---------- */
.toc-panel{
  position:fixed;inset:96px 0 56px auto;width:min(380px,92vw);z-index:50;
  background:var(--navy-deep);color:#EDF3FA;
  border-left:1px solid rgba(255,255,255,.1);
  transform:translateX(100%);transition:transform .3s ease;
  overflow-y:auto;padding:22px 20px 60px;
}
.toc-panel.open{transform:translateX(0)}
.toc-panel h3{margin:0 0 4px;font-family:var(--font-display);font-size:18px}
.toc-panel .toc-sub{margin:0 0 18px;font-size:11.5px;color:#8FA3BA;letter-spacing:.06em}
.toc-chapter{margin:18px 0 6px;font-size:11px;letter-spacing:.14em;color:#7DD3FC;text-transform:uppercase}
.toc-list{list-style:none;margin:0;padding:0}
.toc-list button{
  display:flex;width:100%;gap:10px;align-items:baseline;text-align:left;
  background:none;border:0;border-bottom:1px solid rgba(255,255,255,.07);
  color:#C3D2E4;font:inherit;font-size:13px;line-height:1.5;
  padding:10px 6px;cursor:pointer;border-radius:4px;
}
.toc-list button:hover,.toc-list button:focus-visible{background:rgba(125,211,252,.1);color:#fff;outline:none}
.toc-list button .idx{font-family:var(--font-mono);font-size:10.5px;color:#7DD3FC;min-width:22px}
.toc-list button[aria-current="true"]{color:#fff;background:rgba(125,211,252,.14)}
.scrim{position:fixed;inset:0;background:rgba(4,12,26,.55);z-index:45;opacity:0;pointer-events:none;transition:opacity .3s ease}
.scrim.show{opacity:1;pointer-events:auto}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .g4{grid-template-columns:repeat(2,1fr)}
  .tiles{grid-template-columns:repeat(3,1fr)}
  .split,.split--rev,.split--fig,.split--fig.split--rev{grid-template-columns:1fr}
}
@media (max-width:760px){
  .chapterbar{display:none}
  .topbar{padding:0 12px;height:52px}
  .brand span{display:none}
  .btn{padding:9px 10px;font-size:12px}
  #modeBtn span{display:none}
  .controls{height:52px;padding:0 10px}
  .progress{bottom:51px}
  .slide{padding:76px 18px 96px;overflow-y:auto}
  .toc-panel{inset:52px 0 52px auto;width:min(340px,94vw)}
  h2{font-size:clamp(24px,7vw,34px)}
  .lead{font-size:15.5px}
  .g2,.g3,.g4,.tiles{grid-template-columns:1fr}
  .chain{grid-template-columns:1fr 1fr}
  .chain .step:not(:last-child)::after{display:none}
  .figure img{max-height:46vh}
  .chapter-mark{display:none}
  .metric .v{font-size:30px}
  .cover-title{font-size:clamp(32px,10vw,48px)}
  .cover-sub{font-size:15px;letter-spacing:.04em}
  .hint{margin-top:28px}
  body.long .slide{padding:72px 18px 48px}
}
@media (max-width:400px){
  .chain{grid-template-columns:1fr}
  .controls .navbtn{width:38px;height:38px}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{transition:none!important;animation:none!important}
}

/* ---------- 图表放大灯箱 ---------- */
.lightbox{position:fixed;inset:0;z-index:120;display:none;background:rgba(6,14,28,.92);backdrop-filter:blur(3px)}
.lightbox.open{display:flex;flex-direction:column}
.lightbox-bar{display:flex;align-items:center;gap:8px;padding:10px 14px;color:#DCE6F2;flex:0 0 auto}
.lightbox-bar .lb-title{font-size:13px;letter-spacing:.03em;margin-right:auto;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.lightbox-bar button{background:#12294a;color:#DCE6F2;border:1px solid #213755;border-radius:6px;padding:6px 12px;font-size:13px;cursor:pointer}
.lightbox-bar button:hover{background:#1a3a63}
.lightbox-stage{flex:1 1 auto;overflow:auto;display:flex;align-items:flex-start;justify-content:center;padding:8px 16px 20px}
.lightbox-stage img{display:block;height:auto;max-width:none;border-radius:6px;background:#fff}
.lightbox-cap{flex:0 0 auto;text-align:center;color:#9FB2C8;font-size:12px;padding:0 16px 12px}

@media print{
  .topbar,.controls,.progress,.toc-panel,.scrim,.lightbox{display:none!important}
  body.long #deck{display:block}
  .slide{page-break-after:always;height:auto;min-height:auto}
}