/* ==========================================================================
   NieGeIP · 品牌叙事版 BP —— 网页演示稿
   设计语言：深色底 / 暖白文字 / 香槟金点缀 / 细分隔线 / 大留白
   字体：系统字族（Inter + 苹方/微软雅黑），品牌字标用 Arial Black，无外部字体依赖
   ========================================================================== */

/* ---------- tokens ---------- */
:root {
  --bg: #101110;
  --bg-deep: #0b0c0b;
  --panel: #151613;
  --panel-2: #191b18;
  --white: #dddddd;
  --off: #eeede6;
  --muted: #a5aa9c;
  --gold: #c6b07e;
  --gold-2: #d8c492;
  --line: rgba(228, 219, 197, 0.16);
  --line-soft: rgba(228, 219, 197, 0.09);
  --line-strong: rgba(228, 219, 197, 0.34);
  --font-sans: "Inter", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --font-black: "Arial Black", "Helvetica Neue", "PingFang SC", sans-serif;
  --header: 76px;
  --footer: 84px;
  --pad: clamp(20px, 4.6vw, 72px);
  --dur: 700ms;
  --ease: cubic-bezier(0.22, 0.8, 0.24, 1);
}

/* ---------- reset ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
  scroll-behavior: smooth;
  overflow: hidden;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--white);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
}

/* 关闭态 dialog 必须真正不参与布局（作者样式会盖掉 UA 的 display:none） */
dialog:not([open]) {
  display: none !important;
}

h1, h2, h3, p, figure, ol, ul, dl, dd {
  margin: 0;
  padding: 0;
}

ol, ul { list-style: none; }

img, video { display: block; max-width: 100%; }

a { color: inherit; text-decoration: none; }

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

:focus-visible {
  outline: 2px solid var(--gold-2);
  outline-offset: 3px;
  border-radius: 2px;
}

::selection { background: rgba(198, 176, 126, 0.32); color: #fff; }

.sr-only {
  position: absolute !important;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: fixed;
  top: 8px; left: 8px;
  z-index: 200;
  padding: 10px 16px;
  background: var(--gold);
  color: #14140f;
  font-size: 13px;
  transform: translateY(-160%);
  transition: transform 0.2s var(--ease);
}
.skip-link:focus { transform: translateY(0); }

/* ---------- ambient background ---------- */
.ambient {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  background:
    radial-gradient(58% 46% at 78% 22%, rgba(198, 176, 126, 0.1), transparent 68%),
    radial-gradient(46% 42% at 12% 82%, rgba(150, 160, 140, 0.06), transparent 70%),
    linear-gradient(180deg, #121310 0%, #0e0f0e 58%, #0b0c0b 100%);
}
.ambient__glow {
  position: absolute;
  inset: -10%;
  background: radial-gradient(closest-side, rgba(198, 176, 126, 0.1), transparent 72%);
  opacity: 0.55;
  transform: translate3d(0, 0, 0);
  animation: breathe 18s ease-in-out infinite alternate;
}
.grain {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.05;
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.55'/%3E%3C/svg%3E");
}

@keyframes breathe {
  from { opacity: 0.35; transform: translate3d(-2%, -1%, 0) scale(1); }
  to   { opacity: 0.72; transform: translate3d(2%, 2%, 0) scale(1.08); }
}

/* ---------- top bar ---------- */
.topbar {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 40;
  height: var(--header);
  padding: 0 var(--pad);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-bottom: 1px solid var(--line-soft);
  background: linear-gradient(180deg, rgba(16, 17, 16, 0.92), rgba(16, 17, 16, 0.62));
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 16px;
  min-height: 44px;
  align-content: center;
}

.brand__name {
  font-family: var(--font-black);
  font-size: clamp(17px, 1.55vw, 22px);
  font-weight: 900;
  letter-spacing: -0.035em;
  color: var(--gold);
  line-height: 1;
  transform: translateY(1px);
}

.brand__sub {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--gold-2);
  opacity: 0.92;
  white-space: nowrap;
  line-height: 1;
}

.topbar__actions {
  display: flex;
  align-items: center;
  gap: 6px;
}

.ibtn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-width: 44px;
  min-height: 44px;
  padding: 0 10px;
  color: var(--muted);
  font-size: 12px;
  letter-spacing: 0.08em;
  border-radius: 2px;
  transition: color 0.25s var(--ease), background 0.25s var(--ease);
}
.ibtn:hover { color: var(--off); background: rgba(238, 237, 230, 0.05); }
.ibtn svg { width: 18px; height: 18px; display: block; }
.ibtn__label { white-space: nowrap; }

.ibtn[aria-pressed="false"] .icon-wave { opacity: 0.32; }
.ibtn[aria-pressed="false"]::after {
  content: "";
  position: absolute;
  width: 22px;
  height: 1px;
  background: currentColor;
  transform: rotate(-45deg);
}
.ibtn { position: relative; }

/* ---------- deck ---------- */
#deck {
  position: relative;
  z-index: 10;
  height: 100dvh;
  overflow: hidden;
}

.slide {
  position: absolute;
  inset: calc(var(--header)) 0 var(--footer);
  opacity: 0;
  visibility: hidden;
  transform: translate3d(0, 18px, 0);
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease),
    visibility 0s linear var(--dur);
  pointer-events: none;
}
.slide.is-active {
  opacity: 1;
  visibility: visible;
  transform: none;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease),
    visibility 0s;
  pointer-events: auto;
  z-index: 2;
}

.slide__scroll {
  height: 100%;
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: thin;
  scrollbar-color: rgba(198, 176, 126, 0.32) transparent;
  overscroll-behavior: contain;
}
.slide__scroll::-webkit-scrollbar { width: 6px; }
.slide__scroll::-webkit-scrollbar-thumb {
  background: rgba(198, 176, 126, 0.28);
  border-radius: 3px;
}

.slide__inner {
  min-height: 100%;
  padding: clamp(24px, 3.6vh, 56px) var(--pad) clamp(20px, 3vh, 44px);
  display: grid;
  align-content: safe center;
  gap: clamp(20px, 3.4vh, 40px);
}

/* ---------- footer deck nav ---------- */
.deckfoot {
  position: fixed;
  inset: auto 0 0 0;
  z-index: 40;
  height: var(--footer);
  padding: 0 var(--pad);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 42vw) minmax(0, 1fr);
  align-items: center;
  gap: 24px;
  border-top: 1px solid var(--line-soft);
  background: linear-gradient(0deg, rgba(16, 17, 16, 0.94), rgba(16, 17, 16, 0.6));
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
}

.deckfoot__left {
  display: flex;
  align-items: baseline;
  gap: 18px;
  min-width: 0;
}

.pn {
  font-family: "SF Mono", ui-monospace, Menlo, Consolas, monospace;
  font-size: 13px;
  letter-spacing: 0.06em;
  color: var(--off);
  white-space: nowrap;
  font-variant-numeric: tabular-nums;
}
.pn__sep { color: var(--line-strong); margin: 0 2px; }

.deckfoot__title {
  font-size: 11.5px;
  line-height: 1.4;
  letter-spacing: 0.06em;
  color: var(--muted);
  max-width: 40ch;
  text-wrap: pretty;
}

.progress {
  display: flex;
  align-items: center;
  gap: 5px;
  height: 44px;
}
.progress button {
  flex: 1 1 0;
  height: 44px;
  position: relative;
  min-width: 4px;
}
.progress button::before {
  content: "";
  position: absolute;
  left: 0; right: 0;
  top: 50%;
  height: 1px;
  background: var(--line);
  transition: background 0.35s var(--ease), transform 0.35s var(--ease);
}
.progress button.is-done::before { background: rgba(238, 237, 230, 0.32); }
.progress button.is-current::before {
  background: var(--gold);
  height: 2px;
  transform: translateY(-0.5px);
}
.progress button:hover::before { background: var(--gold-2); }

.deckfoot__nav {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
}
.footline {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 1px;
  background: rgba(228, 219, 197, 0.1);
}
.footline__fill {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, rgba(198, 176, 126, 0.85), rgba(198, 176, 126, 0.35));
  transition: width 0.6s var(--ease);
}

.navbtn {
  width: 46px;
  height: 46px;
  border: 1px solid var(--line);
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--off);
  transition: border-color 0.28s var(--ease), background 0.28s var(--ease),
    color 0.28s var(--ease), transform 0.28s var(--ease);
}
.navbtn svg { width: 18px; height: 18px; }
.navbtn:hover:not(:disabled) {
  border-color: var(--gold);
  color: var(--gold);
  background: rgba(198, 176, 126, 0.07);
}
.navbtn:disabled { opacity: 0.28; cursor: default; }

/* ---------- typography ---------- */
.eyebrow {
  font-family: var(--font-black);
  font-size: clamp(9.5px, 0.78vw, 11px);
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--gold-2);
  white-space: pre-wrap;
  line-height: 1.6;
  font-weight: 900;
}

.h2 {
  font-size: clamp(27px, 3vw, 42px);
  line-height: 1.35;
  font-weight: 500;
  letter-spacing: -0.012em;
  color: var(--off);
  text-wrap: balance;
}
.h2 > span { display: block; }
.h2 em {
  font-style: normal;
  color: var(--gold-2);
}

.lede {
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 2;
  color: var(--gold-2);
  letter-spacing: 0.01em;
}
.lede > span { display: block; }

.body {
  font-size: clamp(15px, 1.15vw, 17px);
  line-height: 1.95;
  color: var(--white);
}
.body > span { display: block; }

.footnote {
  font-size: 12.5px;
  line-height: 1.85;
  color: var(--muted);
  letter-spacing: 0.01em;
}

.rule {
  height: 1px;
  background: var(--line);
  border: 0;
  margin: 0;
}

/* ---------- media ---------- */
.media {
  position: relative;
  border: 1px solid var(--line);
  background: #0c0d0c;
  overflow: hidden;
}
.media--16x9 { aspect-ratio: 16 / 9; width: 100%; }
.media--9x16 { aspect-ratio: 9 / 16; }
.media video,
.media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.media video { background: #0c0d0c; }

.media__play {
  position: absolute;
  right: 14px;
  bottom: 14px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--off);
  background: rgba(12, 13, 12, 0.56);
  border: 1px solid var(--line);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  transition: background 0.25s var(--ease), border-color 0.25s var(--ease),
    transform 0.25s var(--ease);
}
.media__play:hover {
  background: rgba(198, 176, 126, 0.86);
  border-color: transparent;
  color: #151612;
  transform: scale(1.04);
}
.media__play svg { width: 15px; height: 15px; }

.media__tag {
  position: absolute;
  left: 14px;
  top: 12px;
  font-family: "SF Mono", ui-monospace, Menlo, monospace;
  font-size: 10px;
  letter-spacing: 0.16em;
  color: var(--muted);
  text-transform: uppercase;
}

/* ---------- 01 cover ---------- */
.s-cover .slide__inner { padding-top: clamp(20px, 3vh, 40px); }
.cover {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  align-items: center;
  gap: clamp(28px, 4vw, 72px);
  height: 100%;
}
.cover__text { max-width: 620px; }
.cover__title { margin: 0; }
.cover__l1 {
  display: block;
  font-size: clamp(44px, 5.4vw, 82px);
  line-height: 1.18;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--off);
}
.cover__l2 {
  display: block;
  margin-top: 0.06em;
  font-size: clamp(50px, 6.4vw, 100px);
  line-height: 1.14;
  font-weight: 600;
  letter-spacing: -0.025em;
  color: var(--gold);
}
.cover__meta {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: clamp(28px, 5vh, 56px);
}
.cover__meta .rule { width: 56px; flex: none; }
.cover__lede {
  font-size: clamp(13px, 0.95vw, 15px);
  line-height: 1.9;
  color: var(--white);
  max-width: 26em;
  letter-spacing: 0.02em;
}
.cover__lede > span { display: block; }

.strips {
  display: flex;
  gap: clamp(6px, 0.62vw, 10px);
  align-items: stretch;
  justify-content: flex-end;
  height: clamp(300px, 60vh, 620px);
}
.strip {
  position: relative;
  flex: 0 0 auto;
  height: 100%;
  width: auto;
  aspect-ratio: 272 / 1504;
  min-width: 0;
  border: 1px solid var(--line-soft);
  background: #0c0d0c;
  overflow: hidden;
  transition: filter 0.4s var(--ease), transform 0.5s var(--ease),
    border-color 0.4s var(--ease);
}
.strip video { width: 100%; height: 100%; object-fit: cover; }
.strip:hover { filter: brightness(1.08); border-color: var(--line-strong); }
.strip__hit {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  cursor: pointer;
}
.strip__hit::after {
  content: "";
  position: absolute;
  inset: auto 50% 14px 50%;
  width: 1px;
  height: clamp(18px, 3vh, 30px);
  background: rgba(238, 237, 230, 0.5);
  transform: translateX(-50%);
  opacity: 0;
  transition: opacity 0.3s var(--ease);
}
.strip:hover .strip__hit::after { opacity: 1; }

/* ---------- split slides (2/3/5/13) ---------- */
.split {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(0, 1.14fr);
  align-items: center;
  gap: clamp(32px, 5vw, 88px);
}
.split__copy { display: grid; gap: clamp(18px, 2.6vh, 30px); align-content: center; }
.split--media-left { grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr); }

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 30px;
  margin-top: 4px;
}
.tags li {
  position: relative;
  padding-left: 18px;
  font-size: 12.5px;
  letter-spacing: 0.08em;
  color: var(--gold-2);
}
.tags li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  width: 10px;
  height: 1px;
  background: var(--gold);
  opacity: 0.7;
}

/* ---------- 04 platform values ---------- */
.platform {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  align-items: center;
  gap: clamp(32px, 4.6vw, 80px);
}
.values { display: grid; gap: clamp(16px, 2.4vh, 26px); }
.value {
  display: grid;
  gap: 8px;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
}
.value__k {
  font-size: clamp(14px, 1.05vw, 16px);
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--gold-2);
}
.value__v {
  font-size: clamp(13px, 0.92vw, 14.5px);
  line-height: 1.85;
  color: var(--white);
}
.value__v > span { display: block; }

/* ---------- 06 numbers ---------- */
.numbers__title { max-width: 20em; }
.stats {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(26px, 3.4vw, 52px) clamp(24px, 3.2vw, 56px);
  margin-top: clamp(6px, 1.6vh, 14px);
}
.stat {
  padding-top: clamp(14px, 2vh, 20px);
  border-top: 1px solid var(--line);
  display: grid;
  gap: 6px;
  align-content: start;
}
.stat__n {
  font-size: clamp(34px, 3.5vw, 54px);
  line-height: 1.22;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.stat__l {
  font-size: clamp(14px, 1vw, 15.5px);
  font-weight: 500;
  color: var(--off);
  letter-spacing: 0.02em;
}
.stat__s {
  font-size: clamp(12.5px, 0.86vw, 13.5px);
  color: var(--muted);
  letter-spacing: 0.02em;
}
.numbers__foot {
  color: var(--off);
  font-weight: 500;
  padding-top: clamp(10px, 2vh, 20px);
  border-top: 1px solid var(--line-soft);
  max-width: 62em;
}

/* ---------- 07 cases ---------- */
.cases {
  display: grid;
  grid-template-columns: minmax(0, 0.76fr) minmax(0, 1.24fr);
  gap: clamp(28px, 4vw, 64px);
  align-items: center;
}
.cases__copy { display: grid; gap: clamp(16px, 2.4vh, 28px); align-content: center; padding-top: 6px; }
.collage { display: grid; gap: clamp(14px, 1.8vw, 22px); }
.collage__row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: clamp(12px, 1.4vw, 18px);
  align-items: start;
}
.collage__row--bottom {
  grid-template-columns: minmax(0, 0.5fr) minmax(0, 1.5fr);
  align-items: start;
}
.frame {
  position: relative;
  padding: 7px;
  background: #f2efe8;
  box-shadow: 0 18px 40px rgba(0, 0, 0, 0.34);
}
.frame img { width: 100%; height: auto; display: block; }
.frame--wide { aspect-ratio: 16 / 9; padding: 8px; }
.frame--wide img { height: 100%; object-fit: cover; }

.case {
  display: grid;
  gap: 10px;
  align-content: start;
}
.case__cap {
  font-size: clamp(11.5px, 0.82vw, 12.5px);
  line-height: 1.75;
  color: var(--muted);
  letter-spacing: 0.01em;
  max-width: 42em;
}
.case__cap--right { text-align: right; max-width: none; margin-top: -4px; }
.case__zoom {
  position: absolute;
  right: 10px;
  bottom: 10px;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  cursor: zoom-in;
  border-radius: 50%;
  color: var(--off);
  background: rgba(16, 17, 16, 0.62);
  border: 1px solid rgba(238, 237, 230, 0.22);
  -webkit-backdrop-filter: blur(8px);
  backdrop-filter: blur(8px);
  transition: opacity 0.28s var(--ease), background 0.28s var(--ease);
}
.case__zoom svg { width: 17px; height: 17px; }
.case__zoom:hover { background: rgba(198, 176, 126, 0.22); }
@media (hover: hover) {
  .case__zoom { opacity: 0; }
  .frame:hover .case__zoom, .case__zoom:focus-visible { opacity: 1; }
}
.frame:hover { box-shadow: 0 22px 50px rgba(0, 0, 0, 0.45); }

.poster { display: grid; grid-template-columns: minmax(0, auto) minmax(0, 1fr); gap: 12px; align-items: stretch; }
.poster__img { width: min(100%, clamp(132px, 12.5vw, 186px)); }
.poster__cap {
  font-size: clamp(11.5px, 0.82vw, 12.5px);
  line-height: 1.55;
  color: var(--muted);
  letter-spacing: 0.14em;
  padding-top: 2px;
  writing-mode: vertical-rl;
  text-orientation: mixed;
  justify-self: start;
}
.stage { position: relative; }
.frame .stage__detail,
.stage .stage__detail {
  position: absolute;
  right: -5%;
  bottom: -10%;
  width: 38%;
  height: auto;
  border: 1px solid var(--line);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.4);
}
.case__caps { display: grid; gap: 8px; padding-right: 8px; }

/* ---------- 08 loop ---------- */
.loop {
  display: grid;
  gap: 0;
  margin-top: 4px;
}
.loop__row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) auto;
  gap: clamp(14px, 1.6vw, 22px);
  align-items: baseline;
  padding: clamp(12px, 1.8vh, 18px) 0;
  border-top: 1px solid var(--line);
}
.loop__n {
  font-family: "SF Mono", ui-monospace, Menlo, monospace;
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--gold);
}
.loop__t {
  font-size: clamp(15px, 1.12vw, 17.5px);
  font-weight: 500;
  color: var(--off);
  letter-spacing: 0.02em;
}
.loop__d {
  margin-top: 4px;
  font-size: clamp(12.5px, 0.88vw, 13.5px);
  color: var(--muted);
}
.loop__s {
  font-size: 12.5px;
  letter-spacing: 0.1em;
  color: var(--gold-2);
  white-space: nowrap;
}
.loop__media {
  height: clamp(320px, 56vh, 540px);
  width: auto;
  justify-self: center;
}
.flywheel {
  margin-top: clamp(16px, 2.4vh, 24px);
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
  font-size: 12.5px;
  color: var(--muted);
  letter-spacing: 0.02em;
}
.flywheel b { color: var(--off); font-weight: 500; }

/* ---------- 09 market ---------- */
.market {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(30px, 4.2vw, 64px);
  margin-top: clamp(4px, 2vh, 18px);
}
.mkt { padding-top: clamp(16px, 2.2vh, 22px); border-top: 1px solid var(--line); display: grid; gap: 10px; }
.mkt__label {
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--gold-2);
  text-transform: none;
}
.mkt__num {
  font-size: clamp(38px, 4vw, 60px);
  line-height: 1.1;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.mkt:first-child .mkt__num { font-size: clamp(46px, 5.4vw, 80px); }
.mkt__cap {
  margin-top: 8px;
  font-size: clamp(14px, 1vw, 15.5px);
  font-weight: 500;
  color: var(--off);
}

/* ---------- 10 forecast ---------- */
.forecast {
  display: grid;
  grid-template-columns: minmax(0, 1.16fr) minmax(0, 0.84fr);
  gap: clamp(24px, 3.4vw, 56px);
  align-items: stretch;
}
.chartcard {
  border: 1px solid var(--line-strong);
  padding: clamp(18px, 2.4vw, 30px) clamp(18px, 2.4vw, 34px) clamp(16px, 2vw, 24px);
  display: grid;
  align-items: stretch;
  background: linear-gradient(180deg, rgba(238, 237, 230, 0.02), transparent 60%);
}
.chart {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 10px;
  align-items: stretch;
  min-height: clamp(220px, 30vh, 300px);
}
.chart__y {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-items: flex-end;
  font-size: 11.5px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
  padding-bottom: 30px;
}
.chart__plot {
  display: grid;
  grid-template-rows: minmax(0, 1fr) auto;
  border-left: 1px solid var(--line-soft);
}
.chart__bars {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: end;
  gap: clamp(14px, 2.6vw, 38px);
  border-bottom: 1px solid var(--line);
  min-height: clamp(180px, 26vh, 260px);
}
.chart__bar {
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  height: 100%;
  min-height: clamp(180px, 26vh, 260px);
}
.chart__bar i {
  display: block;
  width: 72%;
  max-width: 76px;
  background: linear-gradient(180deg, #d9c393 0%, #c6b07e 62%, #b0945f 100%);
  height: var(--h);
  transform-origin: bottom;
  transform: scaleY(0.001);
  transition: transform 1.1s var(--ease) calc(0.15s + var(--i) * 0.12s);
}
.is-active .chart__bar i { transform: scaleY(1); }
.chart__val {
  position: absolute;
  bottom: calc(var(--h) + 10px);
  left: 50%;
  transform: translateX(-50%);
  font-size: 12px;
  color: var(--off);
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}
.chart__cat-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(14px, 2.6vw, 38px);
  padding-top: 10px;
  text-align: center;
  font-size: 12.5px;
  color: var(--off);
}
.chart__cat-row span { white-space: nowrap; }
.forecast__side { display: grid; gap: 16px; align-content: start; }
.forecast__cap { font-size: 12.5px; color: var(--muted); letter-spacing: 0.02em; margin-top: 12px; }
.forecast__chart { display: grid; align-content: start; }
.platform__eyebrow { margin-bottom: clamp(-6px, -0.6vh, 0px); }

/* ---------- tables ---------- */
.table-wrap { width: 100%; overflow: visible; }
table.data {
  width: 100%;
  border-collapse: collapse;
  font-size: clamp(13px, 0.94vw, 14.5px);
  font-variant-numeric: tabular-nums;
}
table.data th {
  text-align: left;
  font-weight: 500;
  font-size: 12.5px;
  letter-spacing: 0.06em;
  color: var(--muted);
  padding: 0 14px 12px;
  border-bottom: 1px solid var(--line-strong);
  white-space: nowrap;
}
table.data td {
  padding: 14px;
  border-bottom: 1px solid var(--line);
  color: var(--off);
  letter-spacing: 0.01em;
  vertical-align: top;
}
table.data td:first-child { color: var(--white); }
table.data tr:last-child td { border-bottom: 1px solid var(--line-strong); }
table.data th:first-child, table.data td:first-child { padding-left: 2px; }
table.data th:last-child, table.data td:last-child { padding-right: 2px; }

/* ---------- 11 plan ---------- */
.plan {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(0, 1.08fr);
  gap: clamp(28px, 4vw, 64px);
  align-items: center;
}
.plan__left { display: grid; gap: clamp(10px, 1.6vh, 16px); }
.plan__label {
  font-size: clamp(13px, 0.95vw, 15px);
  letter-spacing: 0.14em;
  color: var(--gold-2);
}
.plan__num {
  display: flex;
  align-items: baseline;
  gap: 12px;
  line-height: 0.98;
}
.plan__num b {
  font-size: clamp(66px, 8.4vw, 128px);
  font-weight: 500;
  letter-spacing: -0.04em;
  color: var(--gold);
  font-variant-numeric: tabular-nums;
  line-height: 1.1;
}
.plan__num i {
  font-style: normal;
  font-size: clamp(18px, 1.7vw, 26px);
  color: var(--gold-2);
  letter-spacing: 0.04em;
}
.plan__note {
  margin-top: clamp(8px, 2.4vh, 24px);
  font-size: 12.5px;
  line-height: 1.9;
  color: var(--muted);
  max-width: 40em;
  padding-top: 14px;
  border-top: 1px solid var(--line-soft);
}

/* ---------- 12 roadmap ---------- */
.phases {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(28px, 4vw, 64px);
  margin-top: clamp(4px, 2vh, 16px);
}
.phases::before {
  content: "";
  position: absolute;
  left: 0; right: 0;
  top: 0;
  height: 1px;
  background: var(--line-strong);
}
.phase { position: relative; padding-top: clamp(18px, 2.4vh, 26px); display: grid; gap: 12px; }
.phase::before {
  content: "";
  position: absolute;
  top: -3px;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--gold);
}
.phase__k {
  font-size: clamp(12.5px, 0.92vw, 14px);
  letter-spacing: 0.1em;
  color: var(--gold-2);
}
.phase__v {
  font-size: clamp(16px, 1.3vw, 21px);
  line-height: 1.65;
  color: var(--off);
  letter-spacing: 0.01em;
}

/* ---------- 13 showcase ---------- */
.showcase__media {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(12px, 1.4vw, 18px);
  align-items: start;
}
.showcase__media .media { aspect-ratio: 9 / 16; }
.showcase__media .media:nth-child(2) { transform: translateY(clamp(10px, 2.2vh, 22px)); }

/* ---------- 14 closing ---------- */
.closing { display: grid; place-items: center; text-align: center; min-height: 100%; gap: clamp(22px, 4vh, 44px); }
.closing__line {
  font-size: clamp(24px, 2.7vw, 40px);
  line-height: 1.5;
  font-weight: 500;
  letter-spacing: 0.01em;
  color: var(--gold-2);
  text-wrap: balance;
}
.closing__rule { width: 1px; height: clamp(28px, 5vh, 56px); background: var(--line-strong); }
.closing__url {
  font-family: var(--font-black);
  font-size: clamp(22px, 2.4vw, 34px);
  letter-spacing: -0.01em;
  color: var(--off);
  line-height: 1;
  transition: color 0.3s var(--ease);
}
.closing__url:hover { color: var(--gold-2); }
.closing__badge {
  font-size: 10.5px;
  letter-spacing: 0.24em;
  color: var(--muted);
  text-transform: uppercase;
}

/* ---------- reveal motion ---------- */
[data-reveal] {
  opacity: 0;
  transform: translate3d(0, 14px, 0);
  transition: opacity 0.72s var(--ease), transform 0.72s var(--ease);
  transition-delay: calc(var(--d, 0) * 60ms);
}
.is-active [data-reveal],
.slide.in-view [data-reveal] { opacity: 1; transform: none; }

/* ---------- hint ---------- */
.hint {
  position: fixed;
  left: 50%;
  bottom: calc(var(--footer) + 14px);
  transform: translate(-50%, 8px);
  z-index: 30;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 9px 16px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(12, 13, 12, 0.6);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
  font-size: 11.5px;
  letter-spacing: 0.06em;
  color: var(--muted);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.6s var(--ease), transform 0.6s var(--ease);
}
.hint.is-on { opacity: 1; transform: translate(-50%, 0); }
.hint kbd {
  font-family: inherit;
  border: 1px solid var(--line);
  border-radius: 3px;
  padding: 1px 5px;
  font-size: 10.5px;
  color: var(--off);
}

/* ---------- mobile dock ---------- */
.mobilebar {
  display: none;
  position: fixed;
  left: 0; right: 0; bottom: 0;
  z-index: 40;
  padding: 8px var(--pad) calc(8px + env(safe-area-inset-bottom, 0px));
  background: linear-gradient(0deg, rgba(16, 17, 16, 0.97), rgba(16, 17, 16, 0.82));
  border-top: 1px solid var(--line-soft);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  grid-template-columns: 44px minmax(0, 1fr) 44px;
  align-items: center;
  gap: 12px;
}
.mobilebar__info { display: grid; gap: 5px; min-width: 0; }
.mobilebar__row {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 10px;
}
.mobilebar__pn {
  font-family: "SF Mono", ui-monospace, Menlo, monospace;
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--off);
  font-variant-numeric: tabular-nums;
}
.mobilebar__track {
  position: relative;
  height: 2px;
  background: var(--line-soft);
}
.mobilebar__fill {
  position: absolute;
  inset: 0 auto 0 0;
  background: var(--gold);
  width: 0;
  transition: width 0.4s var(--ease);
}
.mobilebar .navbtn { width: 44px; height: 44px; }

/* ---------- dialogs ---------- */
dialog {
  border: 0;
  padding: 0;
  color: var(--white);
  background: transparent;
  max-width: none;
  max-height: none;
}
dialog::backdrop {
  background: rgba(6, 7, 6, 0.78);
  -webkit-backdrop-filter: blur(10px);
  backdrop-filter: blur(10px);
}

.toc {
  width: min(980px, calc(100vw - 2 * var(--pad)));
  max-height: min(78dvh, 760px);
  margin: auto;
  border: 1px solid var(--line);
  background: linear-gradient(180deg, #151613, #101110);
  box-shadow: 0 40px 120px rgba(0, 0, 0, 0.6);
  overflow: hidden;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
}
.toc__head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  border-bottom: 1px solid var(--line-soft);
}
.toc__title {
  font-family: var(--font-black);
  font-size: 11px;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--gold-2);
}
.toc__list {
  overflow-y: auto;
  padding: 10px 12px 20px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px 10px;
}
.toc__item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  align-items: baseline;
  width: 100%;
  text-align: left;
  padding: 13px 12px;
  border-radius: 2px;
  transition: background 0.22s var(--ease);
}
.toc__item:hover { background: rgba(238, 237, 230, 0.055); }
.toc__item[aria-current="true"] { background: rgba(198, 176, 126, 0.1); }
.toc__n {
  font-family: "SF Mono", ui-monospace, Menlo, monospace;
  font-size: 11px;
  color: var(--gold);
  letter-spacing: 0.06em;
}
.toc__t {
  font-size: 13.5px;
  line-height: 1.6;
  color: var(--off);
  letter-spacing: 0.01em;
}

.lightbox {
  width: 100vw;
  height: 100dvh;
  max-width: 100vw;
  max-height: 100dvh;
  display: grid;
  grid-template-rows: auto minmax(0, 1fr);
  padding: 14px var(--pad) calc(20px + env(safe-area-inset-bottom, 0px));
}
.lightbox__head {
  display: flex;
  justify-content: flex-end;
  padding-bottom: 10px;
}
.lightbox__body {
  display: grid;
  place-items: center;
  min-height: 0;
}
.lightbox__body video,
.lightbox__body img {
  max-width: min(96vw, 1100px);
  max-height: calc(100dvh - 120px);
  width: auto;
  height: auto;
  border: 1px solid var(--line);
  background: #0a0b0a;
}
.lightbox__body video { max-height: calc(100dvh - 120px); }
.lightbox .ibtn { color: var(--off); }

/* ---------- responsive ---------- */
@media (max-width: 1180px) {
  :root { --pad: clamp(20px, 4vw, 48px); }
  .deckfoot { grid-template-columns: minmax(0, 1fr) minmax(180px, 34vw) minmax(0, 1fr); }
  .deckfoot__title { max-width: 24ch; }
  .split, .split--media-left, .platform, .cases, .forecast, .plan {
    gap: clamp(24px, 3.4vw, 48px);
  }
}

@media (max-width: 1023px) {
  .cover { grid-template-columns: minmax(0, 1fr) minmax(0, 0.9fr); }
  .strips { height: min(100%, 62vh); }
  .stats { gap: 28px 32px; }
}

/* ---------- mobile / stacked mode ---------- */
@media (max-width: 899px) {
  html, body { overflow: visible; }
  body { overflow-x: hidden; overflow-y: auto; }
  :root {
    --header: 58px;
    --pad: clamp(18px, 5vw, 32px);
  }

  html { scroll-behavior: auto; }

  body { line-height: 1.8; }

  .ambient__glow { opacity: 0.4; }

  #deck {
    height: auto;
    padding: calc(var(--header) + 8px) 0 calc(72px + env(safe-area-inset-bottom, 0px));
    overflow: visible;
  }

  .slide {
    position: relative;
    inset: auto;
    opacity: 1;
    visibility: visible;
    transform: none;
    pointer-events: auto;
    padding: clamp(30px, 8vw, 52px) 0 clamp(26px, 7vw, 48px);
    border-bottom: 1px solid var(--line-soft);
    scroll-margin-top: calc(var(--header) + 10px);
  }
  .slide:last-child { border-bottom: 0; }
  .slide__scroll { height: auto; overflow: visible; }
  .slide__inner {
    min-height: 0;
    padding: 0 var(--pad);
    align-content: start;
    gap: clamp(20px, 4vh, 30px);
  }

  .deckfoot { display: none; }
  .hint { display: none; }
  .mobilebar { display: grid; }

  .topbar { height: var(--header); gap: 10px; }
  .brand { gap: 10px; }
  .brand__name { font-size: 16px; }
  .brand__sub { font-size: 10px; letter-spacing: 0.04em; }
  .topbar .ibtn { padding: 0 8px; }
  .topbar .ibtn__label { display: none; }

  /* cover */
  .cover {
    grid-template-columns: minmax(0, 1fr);
    height: auto;
    gap: 30px;
    align-items: start;
  }
  .cover__text { max-width: none; }
  .cover__l1 { font-size: clamp(34px, 9.4vw, 54px); }
  .cover__l2 { font-size: clamp(38px, 11vw, 62px); }
  .cover__meta { margin-top: 24px; gap: 12px; }
  .cover__lede { font-size: 14px; line-height: 1.85; }
  .strips {
    height: auto;
    justify-content: flex-start;
    gap: 8px;
    overflow-x: auto;
    padding-bottom: 6px;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .strips::-webkit-scrollbar { display: none; }
  .strip {
    flex: 0 0 118px;
    scroll-snap-align: start;
    aspect-ratio: 272 / 1504;
  }

  /* split / grid blocks -> single column, reading order preserved */
  .split, .split--media-left, .platform, .cases, .forecast, .plan {
    grid-template-columns: minmax(0, 1fr);
    gap: clamp(20px, 4.6vh, 30px);
  }
  .split__copy, .cases__copy, .plan__left { display: grid; gap: 16px; }

  .h2 { font-size: clamp(23px, 6vw, 30px); line-height: 1.42; }
  .lede, .body { font-size: 16px; line-height: 1.9; }
  .value__v { font-size: 15px; }
  .value__k { font-size: 15px; }
  .value__v, .stat__l, .stat__s, .mkt__cap, .case__cap, .poster__cap,
  .loop__d, .loop__t, .phase__v, .flywheel, .numbers__foot { font-size: 16px; }
  .loop__n, .loop__s, .mkt__label, .phase__k, .stats .stat__l { font-size: 13px; }
  .eyebrow { font-size: 10px; letter-spacing: 0.22em; }
  .footnote { font-size: 13px; }
  .closing__line { font-size: clamp(22px, 6.2vw, 30px); }

  /* numbers */
  .stats { grid-template-columns: minmax(0, 1fr); gap: 22px; }
  .stat { padding-top: 14px; }
  .stat__n { font-size: clamp(34px, 9vw, 44px); }
  .numbers__foot { font-size: 14px; }

  .market { grid-template-columns: minmax(0, 1fr); gap: 26px; }
  .mkt__num, .mkt:first-child .mkt__num { font-size: clamp(38px, 10vw, 52px); }

  .phases { grid-template-columns: minmax(0, 1fr); gap: 0; }
  .phases::before { display: none; }
  .phase {
    padding: 18px 0 18px 22px;
    border-top: 1px solid var(--line-soft);
    border-left: 1px solid var(--line);
    gap: 6px;
  }
  .phase::before { top: 24px; left: -3.5px; }
  .phase:first-child { border-top: 1px solid var(--line-strong); }
  .phase__v { font-size: 17px; }

  .loop__row {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 12px;
    padding: 14px 0;
  }
  .loop__s { grid-column: 2; justify-self: start; }

  .plan__num b { font-size: clamp(56px, 18vw, 84px); }
  .plan__num i { font-size: 18px; }
  .plan__note { font-size: 13px; }

  /* cases collage */
  .collage { gap: 18px; }
  .collage__row, .collage__row--bottom { grid-template-columns: minmax(0, 1fr); gap: 18px; }
  .poster { grid-template-columns: minmax(0, 1fr); }
  .poster__img { width: min(62%, 220px); }
  .stage__detail { position: relative; right: auto; bottom: auto; width: 64%; margin: -18% 0 0 auto; }
  .case__cap { font-size: 13px; }
  .poster__cap { font-size: 13px; }

  /* media ordering: text first, media after (same as source order in DOM) */
  .showcase__media { gap: 14px; }
  .showcase__media .media:nth-child(2) { transform: none; }
  .showcase__media { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .showcase__media .media { min-width: 0; }

  /* chart on mobile */
  .chartcard { padding: 16px 14px 14px; }
  .chart { min-height: 200px; }
  .chart__bar i { transform: scaleY(1); }
  .chart__y { font-size: 10.5px; }
  .chart__val { font-size: 11px; }
  .chart__cat-row { font-size: 12px; }

  /* tables -> stacked rows, no horizontal scroll */
  table.data { font-size: 15px; }
  table.data thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  table.data, table.data tbody, table.data tr, table.data td { display: block; width: 100%; }
  table.data tr {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 2px 14px;
    padding: 14px 0;
    border-bottom: 1px solid var(--line);
  }
  table.data tr:last-child { border-bottom: 1px solid var(--line-strong); }
  table.data td {
    border: 0;
    padding: 3px 0;
    font-size: 15px;
  }
  table.data td:first-child {
    grid-column: 1 / -1;
    font-size: 17px;
    font-weight: 500;
    color: var(--off);
    margin-bottom: 4px;
  }
  table.data td[data-label]::before {
    content: attr(data-label);
    display: block;
    font-size: 11.5px;
    letter-spacing: 0.06em;
    color: var(--muted);
    margin-bottom: 1px;
  }

  .media--16x9 { aspect-ratio: 16 / 10; }

  /* top bar safe area */
  .topbar { padding-top: env(safe-area-inset-top, 0px); height: calc(var(--header) + env(safe-area-inset-top, 0px)); }

  .toc { width: 100vw; max-height: 88dvh; border-left: 0; border-right: 0; }
  .toc__list { grid-template-columns: minmax(0, 1fr); }
  .toc__item { padding: 14px 12px; }
  .toc__t { font-size: 15px; }

  .lightbox { padding: 10px 14px calc(14px + env(safe-area-inset-bottom, 0px)); }
  .lightbox__body video, .lightbox__body img { max-width: 96vw; max-height: calc(88dvh - 60px); }

  /* 移动端正文不小于 16px（标签/眉题除外），数据与注释不小于 15px */
  .lede, .body, .value__k, .value__v, .stat__l, .stat__s, .mkt__cap, .case__cap,
  .poster__cap, .loop__d, .loop__t, .phase__v, .flywheel, .numbers__foot,
  .platform__copy, .forecast__cap, .chart__cat-row, table.data, table.data td {
    font-size: 16px;
    letter-spacing: 0.005em;
  }
  .footnote { font-size: 15px; }
  .poster__cap { writing-mode: horizontal-tb; letter-spacing: 0.01em; }
  .case__cap--right { text-align: left; margin-top: 0; }
  .frame .stage__detail, .stage .stage__detail { position: relative; right: auto; bottom: auto; width: 64%; margin: -18% 0 0 auto; }
  .skip-link { min-height: 44px; display: inline-flex; align-items: center; }
  .closing__url { min-height: 44px; display: inline-flex; align-items: center; padding: 2px 4px; }
  .topbar { background: rgba(16, 17, 16, 0.97); }
}

@media (max-width: 420px) {
  .brand__sub { letter-spacing: 0.02em; }
  .strips .strip { flex-basis: 104px; }
  .numbers__title { max-width: none; }
}

/* landscape phones */
@media (max-height: 560px) and (orientation: landscape) {
  .slide__inner { align-content: start; padding-top: 18px; padding-bottom: 18px; }
  .cover__l1 { font-size: clamp(28px, 5vw, 44px); }
  .cover__l2 { font-size: clamp(32px, 6vw, 56px); }
  .cover__meta { margin-top: 18px; }
  .strips { height: 100%; }
  .h2 { font-size: clamp(22px, 3.2vw, 30px); }
}

/* ---------- motion off ---------- */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
  .ambient__glow { animation: none; }
  [data-reveal] { opacity: 1; transform: none; }
  .chart__bar i { transform: scaleY(1); }
}

html[data-motion="off"] *,
html[data-motion="off"] *::before,
html[data-motion="off"] *::after {
  animation-duration: 0.001ms !important;
  animation-iteration-count: 1 !important;
  transition-duration: 0.001ms !important;
}
html[data-motion="off"] .ambient__glow { animation: none; }
html[data-motion="off"] [data-reveal] { opacity: 1; transform: none; }
html[data-motion="off"] .chart__bar i { transform: scaleY(1); }