/* ============================================================
   LOOM · 品牌站 — 设计 token 与宣传片 1:1 同源 (front/loom.css)
   白底 · 发丝线 · Inter/Noto Sans SC · 慢动效 · 留白
   ============================================================ */

:root {
  --canvas: #ffffff;
  --ink: #121212;
  --muted: #8a8a8a;
  --faint: #b4b1ab;
  --line: #dedbd5;
  --hair: #e3e0da;
  --stone: #f6f4ef;
  --shadow: 0 30px 90px rgba(18, 18, 18, 0.07);
  --font: "Inter", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --pad-x: clamp(24px, 5vw, 96px);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--canvas);
  color: var(--ink);
  font-family: var(--font);
  font-weight: 450;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection { background: var(--ink); color: var(--canvas); }

a { color: inherit; text-decoration: none; }
img, video { display: block; max-width: 100%; }

.container {
  width: min(1280px, calc(100% - 2 * var(--pad-x)));
  margin: 0 auto;
}

/* ---------- 文字体系 ---------- */
.label {
  font-size: clamp(12px, 1.1vw, 15px);
  font-weight: 560;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--muted);
}
.h-cn {
  font-size: clamp(34px, 4.6vw, 64px);
  font-weight: 580;
  letter-spacing: 0.01em;
  line-height: 1.12;
  color: var(--ink);
}
.sub {
  font-size: clamp(17px, 1.6vw, 23px);
  font-weight: 450;
  color: var(--muted);
  line-height: 1.55;
}
.num { font-variant-numeric: tabular-nums; }

/* ---------- 公共 chrome ---------- */
.pagenum {
  position: absolute;
  top: clamp(28px, 4vw, 48px);
  right: var(--pad-x);
  font-size: 13px;
  font-weight: 560;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--faint);
}
.rule {
  height: 1.4px;
  background: var(--ink);
  transform-origin: left center;
}
.rule-hair { background: var(--hair); height: 1px; }

section { position: relative; }
.sec { padding: clamp(110px, 14vh, 180px) 0; }
.sec-head { max-width: 880px; }
.sec-head .label { display: block; margin-bottom: 22px; }
.sec-head .label::before {
  content: "";
  display: inline-block;
  width: 36px;
  height: 1.4px;
  background: var(--ink);
  margin-right: 16px;
  vertical-align: 0.3em;
}
.sec-head .sub { margin-top: 24px; max-width: 640px; }

/* ---------- 导航 ---------- */
.nav {
  position: fixed;
  inset: 0 0 auto;
  z-index: 100;
  background: rgba(255, 255, 255, 0.82);
  -webkit-backdrop-filter: blur(14px);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.6s ease;
}
body.scrolled .nav { border-bottom-color: var(--hair); }
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.nav-logo {
  font-size: 17px;
  font-weight: 600;
  letter-spacing: 0.18em;
}
.nav-logo span { color: var(--faint); font-weight: 520; margin-left: 12px; letter-spacing: 0.14em; font-size: 12px; text-transform: uppercase; }
.nav-link {
  font-size: 13px;
  font-weight: 560;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
  padding-bottom: 3px;
  border-bottom: 1.4px solid var(--line);
  transition: color 0.4s ease, border-color 0.4s ease;
}
.nav-link:hover { color: var(--ink); border-bottom-color: var(--ink); }

/* ============================================================
   01 · Hero
   ============================================================ */
.hero {
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: 110px 0 110px;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.05fr 0.82fr;
  align-items: center;
  gap: clamp(40px, 6vw, 96px);
}
.hero-eyebrow { letter-spacing: 0.34em; }
.wordmark {
  font-size: clamp(72px, 10.5vw, 164px);
  font-weight: 600;
  letter-spacing: 0.035em;
  line-height: 1;
  overflow: hidden;
  margin-top: clamp(20px, 3.4vh, 34px);
}
.wordmark .wm-letter { display: inline-block; }
.hero-tagline {
  font-size: clamp(15px, 1.5vw, 21px);
  font-weight: 470;
  color: var(--faint);
  margin-top: clamp(18px, 3vh, 28px);
  letter-spacing: 0.16em;
}
.hero-claim {
  margin-top: clamp(26px, 4.6vh, 42px);
  font-size: clamp(16px, 1.55vw, 21px);
  color: var(--muted);
  font-weight: 460;
  letter-spacing: 0.02em;
  line-height: 1.55;
}
/* 「第一次闭合。」整体不拆行——要断只断在逗号处 */
.hero-claim em { font-style: normal; color: var(--ink); font-weight: 560; white-space: nowrap; }
.hero-cta {
  display: inline-block;
  margin-top: clamp(24px, 4vh, 38px);
  font-size: 14px;
  font-weight: 560;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--ink);
  padding-bottom: 6px;
  border-bottom: 1.4px solid var(--ink);
  transition: opacity 0.4s ease;
}
.hero-cta:hover { opacity: 0.55; }
.hero-visual {
  position: relative;
  margin: 0;
  justify-self: end;
  width: 100%;
  max-width: 480px;
}
.hero-visual .hv-media {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid #e8e5df;
  box-shadow: var(--shadow);
  background: var(--stone);
}
.hv-cap {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-top: 16px;
}
.hv-cap .hc-en {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted);
}
.hv-cap .hc-cn { font-size: 13px; color: var(--faint); letter-spacing: 0.1em; }
.hero-foot {
  position: absolute;
  bottom: 36px;
  left: var(--pad-x);
  font-size: 13px;
  font-weight: 520;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--faint);
}
.scroll-cue {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.scroll-cue .sc-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--faint);
}
.scroll-cue .sc-line {
  width: 1.4px;
  height: 44px;
  background: var(--line);
  overflow: hidden;
  position: relative;
}
.scroll-cue .sc-line i {
  position: absolute;
  inset: 0;
  background: var(--ink);
  transform-origin: top center;
}

/* ---------- 动态字带 ---------- */
.marquee {
  border-top: 1px solid var(--hair);
  border-bottom: 1px solid var(--hair);
  overflow: hidden;
  padding: 18px 0;
}
.mq-track {
  display: flex;
  width: max-content;
  animation: mq-scroll 42s linear infinite;
}
.mq-track span {
  flex: none;
  white-space: nowrap;
  font-size: 14px;
  font-weight: 540;
  letter-spacing: 0.26em;
  text-transform: uppercase;
  color: var(--faint);
}
@keyframes mq-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ---------- 滚动进度轨 ---------- */
.rail {
  position: fixed;
  right: 26px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 90;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}
.rail-label {
  writing-mode: vertical-rl;
  font-size: 11px;
  font-weight: 580;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--faint);
  transition: opacity 0.5s ease;
}
.rail-line {
  position: relative;
  width: 1.4px;
  height: 30vh;
  background: var(--hair);
}
.rail-line i {
  position: absolute;
  left: 50%;
  top: 0;
  transform: translate(-50%, -50%);
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--ink);
}

/* ============================================================
   02 · 不可能三角 (pinned)
   ============================================================ */
.tri-sec { padding: 0; }
.tri-pin {
  min-height: 100svh;
  display: grid;
  place-items: center;
  padding: 80px 0;
}
.tri-stage {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: clamp(40px, 6vw, 90px);
  width: min(1280px, calc(100% - 2 * var(--pad-x)));
}
.tri-wrap {
  position: relative;
  justify-self: center;
  width: min(480px, 100%);
  aspect-ratio: 560 / 500;
}
.tri-svg { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
.tri-side { fill: none; stroke: var(--ink); stroke-width: 1.6; }
.tri-fill { fill: var(--ink); opacity: 0; }
.vtx { position: absolute; transform: translate(-50%, -50%); text-align: center; white-space: nowrap; }
.vtx .v-cn { font-size: clamp(18px, 2vw, 27px); font-weight: 580; }
.vtx .v-en { font-size: clamp(10px, 1vw, 13px); letter-spacing: 0.2em; text-transform: uppercase; color: var(--muted); margin-top: 6px; }
.vtx-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--ink);
  position: absolute;
  transform: translate(-50%, -50%);
}
.seed {
  position: absolute; left: 50%; top: 58%;
  transform: translate(-50%, -50%);
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--ink);
  opacity: 0;
}
.seed-ring {
  position: absolute; left: 50%; top: 58%;
  transform: translate(-50%, -50%) scale(0.4);
  width: 64px; height: 64px; border-radius: 50%;
  border: 1.4px solid var(--ink);
  opacity: 0;
}
.tri-copy .label { display: block; }
.tri-states { position: relative; margin-top: 26px; min-height: clamp(180px, 24vh, 230px); }
.tri-state { position: absolute; top: 0; left: 0; opacity: 0; }
.tri-state .big {
  font-size: clamp(40px, 4.8vw, 66px);
  font-weight: 600;
  letter-spacing: 0.005em;
  line-height: 1.1;
}
.tri-state .small {
  font-size: clamp(16px, 1.7vw, 24px);
  font-weight: 470;
  color: var(--muted);
  margin-top: 18px;
  max-width: 520px;
  line-height: 1.5;
}
.tri-rule { width: 64px; margin-top: 30px; transform: scaleX(0); }

/* ============================================================
   03 · 四种场景
   ============================================================ */
.who-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  column-gap: clamp(40px, 5vw, 72px);
  margin-top: clamp(56px, 8vh, 90px);
}
.who-cell {
  position: relative;
  padding: 38px 0 clamp(44px, 6vh, 64px);
}
.who-cell .cell-rule { position: absolute; top: 0; left: 0; right: 0; transition: background-color 0.5s ease; }
.who-cell:hover .cell-rule { background: var(--ink); }
.who-idx { font-size: 14px; font-weight: 600; letter-spacing: 0.16em; color: var(--faint); transition: color 0.5s ease; }
.who-cell:hover .who-idx { color: var(--ink); }
.who-cn { font-size: clamp(26px, 2.8vw, 40px); font-weight: 560; margin-top: 16px; }
.who-en { font-size: 14px; font-weight: 520; letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted); margin-top: 12px; }
.who-note {
  font-size: clamp(15px, 1.5vw, 19px);
  color: var(--muted);
  margin-top: 14px;
  max-width: 520px;
  line-height: 1.5;
}

/* ============================================================
   04 · 痛点（pinned，一页一页白场叠化）
   ============================================================ */
.pain-sec { padding: 0; }
.pain-pin {
  min-height: 100svh;
  display: grid;
  place-items: center;
  overflow: hidden;
  padding: 80px 0;
}
.pain-line {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  width: min(1100px, calc(100% - 2 * var(--pad-x)));
  opacity: 0;
}
.pain-tag {
  font-size: 14px;
  font-weight: 580;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--faint);
}
.pain-cn {
  font-size: clamp(30px, 4.6vw, 66px);
  font-weight: 580;
  margin-top: 26px;
  line-height: 1.2;
  letter-spacing: 0.005em;
}
.pain-sub {
  font-size: clamp(16px, 1.8vw, 25px);
  font-weight: 450;
  color: var(--muted);
  margin-top: 24px;
  line-height: 1.55;
}
.pain-call .pc-top {
  font-size: clamp(18px, 2.2vw, 29px);
  font-weight: 470;
  color: var(--muted);
  letter-spacing: 0.04em;
}
.pain-call .pc-bottom {
  font-size: clamp(36px, 5vw, 60px);
  font-weight: 600;
  margin-top: 30px;
  padding-left: 0.55em; /* 全角句号墨水偏左，补左让字面光学居中 */
}

/* ============================================================
   05 · 三项能力
   ============================================================ */
.cap-head {
  max-width: none;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: clamp(32px, 5vw, 72px);
}
.cap-figure { margin: 0; }
.cap-figure img {
  width: clamp(170px, 19vw, 250px);
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 12px;
  border: 1px solid #e8e5df;
  box-shadow: var(--shadow);
  background: var(--stone);
}
.cap-block {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: clamp(36px, 5vw, 72px);
  align-items: center;
  margin-top: clamp(80px, 12vh, 140px);
}
.cap-block:first-of-type { margin-top: clamp(56px, 8vh, 96px); }
.cap-idx { font-size: 15px; font-weight: 600; letter-spacing: 0.16em; color: var(--faint); }
.cap-cn { font-size: clamp(30px, 3.4vw, 50px); font-weight: 580; margin-top: 18px; line-height: 1.12; }
.cap-en { font-size: 14px; font-weight: 540; letter-spacing: 0.2em; text-transform: uppercase; color: var(--muted); margin-top: 16px; }
.cap-desc {
  font-size: clamp(16px, 1.6vw, 21px);
  color: var(--muted);
  margin-top: 24px;
  max-width: 460px;
  line-height: 1.55;
}

/* 玻璃面板 */
.glass {
  position: relative;
  border: 1px solid #e8e5df;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.glass-bar {
  height: 52px;
  border-bottom: 1px solid var(--hair);
  display: flex;
  align-items: center;
  padding: 0 22px;
  gap: 8px;
}
.glass-dot { width: 9px; height: 9px; border-radius: 50%; background: #e2ddd4; flex: none; }
.glass-url { margin-left: 14px; font-size: 13px; color: var(--faint); letter-spacing: 0.04em; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.glass-tag { margin-left: auto; font-size: 11px; font-weight: 600; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); flex: none; }
.glass-body { position: relative; padding: clamp(20px, 2.4vw, 30px); }

/* 面板 1 · 数据监控 */
.mon-rows { padding-bottom: clamp(110px, 12vw, 150px); }
.mon-row {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  height: clamp(44px, 4.6vw, 56px);
  border-bottom: 1px solid #f0eee9;
}
.mon-row .mr-name { font-size: clamp(14px, 1.4vw, 17px); color: #3a3a3a; }
.mon-row .mr-val { font-size: clamp(13px, 1.3vw, 15px); font-weight: 600; font-variant-numeric: tabular-nums; }
.spark {
  position: absolute;
  right: clamp(20px, 2.4vw, 30px);
  bottom: clamp(20px, 2.4vw, 30px);
  width: min(360px, 60%);
  height: auto;
}
.spark path { fill: none; stroke: var(--ink); stroke-width: 1.8; }

/* 面板 2 · 生图生视频 */
.asset-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(10px, 1.2vw, 14px);
}
.asset {
  border-radius: 8px;
  background: var(--stone);
  position: relative;
  overflow: hidden;
  aspect-ratio: 4 / 5;
}
.asset img, .asset video {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  object-fit: cover;
}

/* 面板 3 · 综合运营 */
.ops-body { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(20px, 2.4vw, 30px); }
.agent-cards { display: grid; gap: clamp(10px, 1.2vw, 14px); align-content: start; }
.agent-card {
  border: 1px solid var(--hair);
  border-radius: 9px;
  padding: clamp(13px, 1.4vw, 17px) clamp(14px, 1.6vw, 18px);
  background: #fff;
}
.agent-card .ac-t { font-size: clamp(14px, 1.4vw, 17px); font-weight: 560; }
.agent-card .ac-s { font-size: 11px; color: var(--faint); margin-top: 6px; letter-spacing: 0.1em; text-transform: uppercase; }
.targets {
  border-left: 1px solid var(--hair);
  padding-left: clamp(18px, 2.2vw, 26px);
  display: grid;
  align-content: start;
  gap: 0;
}
.target {
  position: relative;
  padding: clamp(12px, 1.4vw, 16px) 0 clamp(12px, 1.4vw, 16px) 26px;
  font-size: clamp(13px, 1.35vw, 16px);
  color: #555;
}
.target::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 7px; height: 7px;
  border-radius: 50%;
  border: 1.4px solid var(--ink);
  background: #fff;
}
.target + .target { border-top: 1px solid #f0eee9; }
.target .tg-en { display: block; font-size: 10px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--faint); margin-top: 4px; }

/* ============================================================
   06 · 案例 + 影片
   ============================================================ */
.reel-kicker {
  margin-top: clamp(48px, 7vh, 80px);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted);
}
.reel-kicker::before {
  content: "";
  display: inline-block;
  width: 24px;
  height: 1.4px;
  background: var(--ink);
  margin-right: 12px;
  vertical-align: 0.3em;
}
.reel {
  position: relative;
  border-radius: 14px;
  overflow: hidden;
  background: var(--stone);
  box-shadow: 0 40px 110px rgba(18, 18, 18, 0.1);
  cursor: pointer;
  margin-top: 18px;
}
.reel video { width: 100%; aspect-ratio: 16 / 9; object-fit: cover; }
.reel-play {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  transition: opacity 0.5s ease;
  pointer-events: none;
}
.reel-play .rp-btn {
  width: clamp(64px, 7vw, 88px);
  height: clamp(64px, 7vw, 88px);
  border-radius: 50%;
  border: 1.4px solid rgba(255, 255, 255, 0.9);
  background: rgba(18, 18, 18, 0.22);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
  display: grid;
  place-items: center;
  transition: transform 0.5s ease;
}
.reel:hover .rp-btn { transform: scale(1.06); }
.reel-play svg { width: 26%; height: 26%; fill: #fff; margin-left: 6%; }
.reel.is-playing .reel-play { opacity: 0; }
.reel-cap { text-align: center; margin-top: 28px; }
.reel-cap .rc-en { font-size: 13px; font-weight: 540; letter-spacing: 0.24em; text-transform: uppercase; color: var(--muted); }
.reel-cap .rc-cn { font-size: clamp(17px, 1.8vw, 25px); font-weight: 520; margin-top: 12px; letter-spacing: 0.04em; }

.film-block { margin-top: clamp(90px, 13vh, 150px); }
.film-block .label { display: block; margin-bottom: 8px; }

/* ============================================================
   07 · 合作模式
   ============================================================ */
.how-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(40px, 5vw, 72px);
  margin-top: clamp(56px, 8vh, 90px);
}
.how-col { position: relative; padding-top: 38px; }
.how-col .cell-rule { position: absolute; top: 0; left: 0; right: 0; }
.how-idx { font-size: 14px; font-weight: 600; letter-spacing: 0.16em; color: var(--faint); }
.how-cn { font-size: clamp(26px, 2.8vw, 40px); font-weight: 560; margin-top: 16px; }
.how-en { font-size: 14px; font-weight: 520; letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted); margin-top: 12px; }
.how-badge {
  display: inline-block;
  margin-left: 12px;
  font-size: 12px;
  font-weight: 580;
  letter-spacing: 0.12em;
  color: var(--ink);
  border: 1.4px solid var(--ink);
  border-radius: 999px;
  padding: 3px 12px;
  vertical-align: 4px;
}
.how-note {
  font-size: clamp(15px, 1.6vw, 20px);
  color: var(--muted);
  margin-top: 18px;
  max-width: 480px;
  line-height: 1.55;
}
.how-note em { font-style: normal; color: var(--ink); font-weight: 540; }
.how-list { list-style: none; margin-top: 28px; }
.how-list li {
  position: relative;
  padding: 16px 0 16px 36px;
  font-size: clamp(15px, 1.5vw, 19px);
  color: #4a4a4a;
  border-top: 1px solid #f0eee9;
}
.how-list li:last-child { border-bottom: 1px solid #f0eee9; }
.how-list .li-idx {
  position: absolute;
  left: 0;
  font-size: 13px;
  font-weight: 600;
  color: var(--faint);
  letter-spacing: 0.08em;
  top: 50%;
  transform: translateY(-50%);
}
.how-list .li-en { display: block; font-size: 11px; letter-spacing: 0.14em; text-transform: uppercase; color: var(--faint); margin-top: 5px; }
.how-stance {
  margin-top: clamp(64px, 9vh, 100px);
  text-align: center;
  font-size: clamp(19px, 2.2vw, 28px);
  font-weight: 470;
  color: var(--muted);
  letter-spacing: 0.03em;
}
.how-stance em { font-style: normal; color: var(--ink); font-weight: 580; }

/* ============================================================
   08 · CTA / 页脚
   ============================================================ */
.cta-sec {
  min-height: 88svh;
  display: grid;
  align-items: center;
}
.cta-eyebrow { display: block; }
.cta-eyebrow::before {
  content: "";
  display: inline-block;
  width: 36px;
  height: 1.4px;
  background: var(--ink);
  margin-right: 16px;
  vertical-align: 0.3em;
}
.cta-big {
  font-size: clamp(38px, 6vw, 84px);
  font-weight: 600;
  letter-spacing: 0.01em;
  margin-top: 30px;
  line-height: 1.15;
}
.cta-mail {
  display: inline-block;
  margin-top: clamp(36px, 5vh, 52px);
  font-size: clamp(15px, 1.5vw, 19px);
  font-weight: 540;
  letter-spacing: 0.1em;
  color: var(--ink);
  padding: 0 0 8px;
  background: none;
  border: 0;
  border-bottom: 1.4px solid var(--ink);
  font-family: var(--font);
  cursor: pointer;
  transition: opacity 0.4s ease;
}
.cta-mail:hover { opacity: 0.55; }
.cta-hint { margin-top: 22px; font-size: 13px; color: var(--faint); letter-spacing: 0.1em; }

/* ---------- 二维码弹层 ---------- */
.qr-modal { position: fixed; inset: 0; z-index: 200; display: grid; place-items: center; }
.qr-modal[hidden] { display: none; }
.qr-backdrop {
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.86);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
}
.qr-card {
  position: relative;
  background: #fff;
  border: 1px solid #e8e5df;
  border-radius: 12px;
  box-shadow: 0 40px 110px rgba(18, 18, 18, 0.12);
  padding: clamp(36px, 5vw, 52px) clamp(40px, 6vw, 64px) clamp(30px, 4vw, 42px);
  text-align: center;
  width: min(420px, calc(100% - 48px));
}
.qr-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  background: none;
  border: 0;
  color: var(--muted);
  cursor: pointer;
  transition: color 0.3s ease;
}
.qr-close:hover { color: var(--ink); }
.qr-close svg { width: 16px; height: 16px; }
.qr-label { display: block; }
.qr-img {
  width: min(260px, 60vw);
  margin: 26px auto 0;
  display: block;
}
.qr-cn { font-size: 19px; font-weight: 560; margin-top: 22px; letter-spacing: 0.04em; }
.qr-en { font-size: 12px; font-weight: 540; letter-spacing: 0.24em; text-transform: uppercase; color: var(--muted); margin-top: 10px; }
.qr-alt { font-size: 12.5px; color: var(--faint); margin-top: 24px; letter-spacing: 0.04em; }
.qr-alt a { border-bottom: 1px solid var(--line); padding-bottom: 2px; transition: color 0.3s ease; }
.qr-alt a:hover { color: var(--ink); }
body.qr-open { overflow: hidden; }

.footer { border-top: 1px solid var(--hair); }
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  padding: 34px 0;
  font-size: 12.5px;
  font-weight: 540;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--faint);
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1100px) {
  .rail { display: none; }
}

@media (max-width: 880px) {
  .pagenum { display: none; }
  .hero { padding-top: 96px; }
  .hero-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero-visual { justify-self: start; max-width: min(380px, 86vw); }
  .cap-head { grid-template-columns: 1fr; align-items: start; }
  .pain-call .pc-bottom { padding-left: 0; }
  .tri-stage { grid-template-columns: 1fr; gap: 44px; }
  .tri-wrap { width: min(340px, 78vw); }
  .tri-states { min-height: 220px; }
  .who-grid, .how-grid, .ops-body { grid-template-columns: 1fr; }
  .cap-block { grid-template-columns: 1fr; gap: 32px; }
  .targets { border-left: 0; padding-left: 0; }
  .asset-grid { grid-template-columns: repeat(2, 1fr); }
  .asset-grid .asset:nth-child(n + 5) { display: none; }
  .nav-logo span { display: none; }
  .hero-foot { display: none; }
}

/* ============================================================
   入场初始态（JS 接管；no-js / reduced-motion 时还原可见）
   ============================================================ */
.js [data-reveal], .js [data-hero], .js .hero-visual { opacity: 0; }
.js .cell-rule[data-rule] { transform: scaleX(0); }

.no-motion [data-reveal], .no-motion [data-hero], .no-motion .hero-visual, .no-motion .wordmark .wm-letter { opacity: 1 !important; transform: none !important; filter: none !important; }
.no-motion .cell-rule[data-rule] { transform: none; }
.no-motion .tri-side { stroke-dasharray: none !important; stroke-dashoffset: 0 !important; }
.no-motion .tri-state { position: static; opacity: 1; }
.no-motion .tri-state + .tri-state { margin-top: 34px; }
.no-motion .tri-rule { transform: none; }
.no-motion .seed { opacity: 1; }
.no-motion .tri-fill { opacity: 0.04; }
.no-motion .pain-pin { min-height: 0; display: block; padding: 0; }
.no-motion .pain-line { position: static; transform: none; opacity: 1; margin: 72px auto; }
.no-motion .spark path { stroke-dasharray: none !important; stroke-dashoffset: 0 !important; }
.no-motion .scroll-cue, .no-motion .rail { display: none; }
.no-motion .mq-track { animation: none; }