/* ============================================================
 * home.css —— 首页 10 屏叙事走廊（宇宙星空版）
 * ============================================================ */

@import url('./base.css');

/* —— 全屏 section 通用 —— */
.scene {
  min-height: 100vh;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 120px 0 var(--s-9);
}

/* ============================================================
 * S1 · HERO
 * ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  overflow: hidden;
  display: flex;
  align-items: center;
}

.hero__inner {
  position: relative;
  z-index: var(--z-base);
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: var(--s-8);
  align-items: center;
  width: 100%;
  padding-top: 80px;
}

.hero__copy { padding-bottom: 80px; }
.hero__eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-mono);
  text-transform: uppercase;
  color: var(--gray-4);
  margin-bottom: var(--s-6);
  opacity: 0;
  animation: fade-in 1s var(--ease-jt) 0.2s forwards;
}
.hero__eyebrow::before {
  content: '';
  width: 32px; height: 1px;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan-glow);
}

.hero__title {
  font-family: var(--font-serif-cn);
  font-size: var(--fs-h1);
  font-weight: 600;
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  color: #F0F2FF;
  margin-bottom: var(--s-6);
  text-shadow: 0 0 30px rgba(123, 226, 214, 0.08);
}

/* 逐字浮现：每个字符是一个 span，由 reveal.js 注入 */
.hero__title .char {
  display: inline-block;
  opacity: 0;
  transform: translateY(0.4em);
  filter: blur(6px);
  animation: char-rise 1s var(--ease-jt) forwards;
}
@keyframes char-rise {
  to { opacity: 1; transform: translateY(0); filter: blur(0); }
}
.hero__title .accent {
  color: var(--cyan);
  position: relative;
  text-shadow: 0 0 24px var(--cyan-glow);
}

.hero__subtitle {
  font-family: var(--font-serif-en);
  font-size: var(--fs-h6);
  font-weight: 300;
  font-style: italic;
  letter-spacing: 0.01em;
  color: var(--gray-5);
  margin-bottom: var(--s-7);
  opacity: 0;
  animation: fade-in var(--t-slow) var(--ease-jt) 1.6s forwards;
}

.hero__meta {
  display: flex;
  gap: var(--s-6);
  flex-wrap: wrap;
  font-family: var(--font-mono);
  font-size: var(--fs-mini);
  color: var(--gray-4);
  letter-spacing: var(--ls-mono);
  text-transform: uppercase;
  opacity: 0;
  animation: fade-in var(--t-slow) var(--ease-jt) 1.9s forwards;
}
.hero__meta-item { display: inline-flex; align-items: center; gap: 8px; }
.hero__meta-dot {
  width: 6px; height: 6px;
  background: var(--cyan);
  display: inline-block;
  box-shadow: 0 0 8px var(--cyan-glow);
}

/* Hero 三维体舞台 */
.hero__stage {
  position: relative;
  width: 100%;
  aspect-ratio: 4 / 5;
  max-height: 80vh;
}
.hero__canvas { width: 100%; height: 100%; display: block; }

/* 光晕：在金属体后面加一个柔和的圆形光斑 */
.hero__stage::before {
  content: '';
  position: absolute;
  left: 50%; top: 50%;
  width: 60%; height: 60%;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(123, 226, 214, 0.18), transparent 60%);
  pointer-events: none;
  filter: blur(40px);
  animation: hero-glow 4s var(--ease-jt) infinite;
}
@keyframes hero-glow {
  0%, 100% { opacity: 0.55; transform: translate(-50%, -50%) scale(0.95); }
  50% { opacity: 1; transform: translate(-50%, -50%) scale(1.1); }
}

.hero__stage-meta {
  position: absolute;
  left: 0; bottom: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-mono);
  color: var(--gray-3);
  text-transform: uppercase;
}
.hero__stage-meta-row { display: flex; gap: 8px; align-items: baseline; }
.hero__stage-meta-key { color: var(--gray-3); }
.hero__stage-meta-val { color: var(--cyan); }

@keyframes fade-in {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
 * S2 · 当下：GUI 时代结束
 * ============================================================ */
.s-now {
  border-top: 1px solid var(--line-hair);
}
.s-now__grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: var(--s-8);
  margin-top: var(--s-9);
}
.necessity {
  position: relative;
  padding-top: var(--s-5);
  border-top: 1px solid var(--line-fine);
  transition: transform var(--t-base) var(--ease-jt);
}
.necessity:hover {
  transform: translateY(-4px);
}
.necessity:hover::before {
  opacity: 1;
}
.necessity::before {
  content: '';
  position: absolute;
  top: -1px; left: 0; right: 0;
  height: 1px;
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan-glow);
  opacity: 0;
  transition: opacity var(--t-base) var(--ease-jt);
}

.necessity__num {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-mono);
  color: var(--cyan);
  margin-bottom: var(--s-3);
  text-transform: uppercase;
}
.necessity__head {
  font-family: var(--font-serif-cn);
  font-size: var(--fs-h5);
  font-weight: 500;
  line-height: var(--lh-snug);
  color: #F0F2FF;
  margin-bottom: var(--s-4);
}
.necessity__lead {
  font-family: var(--font-serif-en);
  font-size: var(--fs-mini);
  font-style: italic;
  color: var(--gray-4);
  margin-bottom: var(--s-5);
}
.necessity__body {
  font-size: var(--fs-mini);
  color: var(--gray-5);
  line-height: var(--lh-loose);
}
.necessity__data {
  margin-top: var(--s-5);
  padding-top: var(--s-4);
  border-top: 1px dashed var(--line-hair);
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-mono);
  color: var(--gray-3);
  text-transform: uppercase;
}

/* ============================================================
 * S3 · 病灶：四引擎
 * ============================================================ */
.s-pain { padding-bottom: var(--s-10); }
.s-pain__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line-fine);
  margin-top: var(--s-9);
  background: rgba(10, 14, 38, 0.4);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.engine {
  padding: var(--s-6) var(--s-5);
  border-right: 1px solid var(--line-fine);
  position: relative;
  cursor: default;
  transition: background var(--t-base) var(--ease-jt);
  overflow: hidden;
}
.engine:last-child { border-right: none; }
.engine::after {
  content: '';
  position: absolute;
  top: 0; left: 0;
  right: 100%; bottom: 0;
  background: radial-gradient(ellipse at left top, var(--cyan-soft), transparent 60%);
  transition: right var(--t-slow) var(--ease-jt);
  pointer-events: none;
}
.engine:hover::after { right: 0; }
.engine:hover .engine__title { color: var(--cyan); text-shadow: 0 0 16px var(--cyan-glow); }
.engine__num {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-mono);
  color: var(--gray-3);
  margin-bottom: var(--s-3);
  position: relative;
}
.engine__title {
  font-family: var(--font-serif-cn);
  font-size: var(--fs-h6);
  font-weight: 500;
  margin-bottom: var(--s-5);
  color: #F0F2FF;
  transition: color var(--t-base) var(--ease-jt), text-shadow var(--t-base) var(--ease-jt);
  position: relative;
}
.engine__list { list-style: none; display: flex; flex-direction: column; gap: var(--s-3); position: relative; }
.engine__list li {
  font-size: var(--fs-mini);
  color: var(--gray-5);
  padding-left: 14px;
  position: relative;
  line-height: var(--lh-snug);
}
.engine__list li::before {
  content: '';
  position: absolute; left: 0; top: 9px;
  width: 6px; height: 1px;
  background: var(--gray-3);
}
.engine__list li b {
  display: block;
  font-weight: 500;
  color: var(--gray-4);
  font-size: var(--fs-micro);
  font-family: var(--font-mono);
  letter-spacing: var(--ls-mono);
  text-transform: uppercase;
  margin-bottom: 2px;
}

/* ============================================================
 * S4 · 转折：呼吸屏
 * ============================================================ */
.s-shift {
  min-height: 80vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: var(--s-11) 0;
  position: relative;
}
.s-shift::before {
  content: '';
  position: absolute;
  left: 50%; top: 50%;
  transform: translate(-50%, -50%);
  width: 80vw; height: 80vw;
  max-width: 1200px;
  max-height: 1200px;
  background: radial-gradient(circle, rgba(123, 226, 214, 0.05), transparent 50%);
  pointer-events: none;
  filter: blur(40px);
}
.s-shift__line {
  font-family: var(--font-serif-cn);
  font-size: clamp(40px, 6vw, 96px);
  font-weight: 500;
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  color: #F0F2FF;
  max-width: 18ch;
  position: relative;
}
.s-shift__line em {
  font-style: normal;
  color: var(--cyan);
  font-family: var(--font-serif-en);
  font-weight: 400;
  text-shadow: 0 0 24px var(--cyan-glow);
}
.s-shift__divider {
  margin-top: var(--s-7);
  width: 240px;
  height: 32px;
}

/* ============================================================
 * S5 · 架构：四层
 * ============================================================ */
.s-arch__grid {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: var(--s-8);
  margin-top: var(--s-9);
  align-items: start;
}
.stack {
  display: flex;
  flex-direction: column;
  gap: 1px;
  background: var(--line-fine);
  border: 1px solid var(--line-fine);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}
.layer {
  padding: var(--s-5) var(--s-6);
  background: rgba(17, 22, 58, 0.6);
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: var(--s-5);
  align-items: center;
  cursor: pointer;
  transition: background var(--t-base) var(--ease-jt), border-color var(--t-base) var(--ease-jt);
  position: relative;
  overflow: hidden;
}
.layer:hover, .layer.is-active {
  background: rgba(35, 42, 101, 0.85);
}
.layer.is-active::before {
  content: '';
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 2px;
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan-glow);
}
.layer:hover .layer__name, .layer.is-active .layer__name { color: var(--cyan); }
.layer__num {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-mono);
  color: var(--gray-3);
}
.layer__name {
  font-family: var(--font-serif-cn);
  font-size: var(--fs-h6);
  font-weight: 500;
  color: #F0F2FF;
  transition: color var(--t-base) var(--ease-jt);
}
.layer__tag {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-mono);
  color: var(--gray-4);
  text-transform: uppercase;
}
.layer__detail {
  position: sticky;
  top: 100px;
  border-left: 1px solid var(--line-fine);
  padding-left: var(--s-6);
}
.layer__detail-num {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-mono);
  color: var(--cyan);
  margin-bottom: var(--s-3);
}
.layer__detail-title {
  font-family: var(--font-serif-cn);
  font-size: var(--fs-h4);
  font-weight: 500;
  line-height: var(--lh-snug);
  margin-bottom: var(--s-4);
  color: #F0F2FF;
}
.layer__detail-body {
  font-size: var(--fs-body);
  color: var(--gray-5);
  line-height: var(--lh-loose);
  margin-bottom: var(--s-5);
}
.layer__detail-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
}
.layer__detail-list li {
  font-family: var(--font-mono);
  font-size: var(--fs-mini);
  color: var(--gray-5);
  padding-left: 16px;
  position: relative;
}
.layer__detail-list li::before {
  content: '+';
  position: absolute; left: 0;
  color: var(--cyan);
}

/* ============================================================
 * S6 · 演示：试着说点什么
 * ============================================================ */
.s-demo__stage {
  margin-top: var(--s-9);
  border: 1px solid var(--line-fine);
  padding: var(--s-7);
  background: linear-gradient(180deg, rgba(17, 22, 58, 0.7), rgba(10, 14, 38, 0.5));
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  position: relative;
  overflow: hidden;
}
.s-demo__stage::before {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 200px; height: 200px;
  background: radial-gradient(circle, var(--cyan-soft), transparent 60%);
  filter: blur(30px);
  pointer-events: none;
}
.demo-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-mono);
  color: var(--gray-3);
  text-transform: uppercase;
  padding-bottom: var(--s-5);
  border-bottom: 1px solid var(--line-fine);
  margin-bottom: var(--s-6);
  position: relative;
}
.demo-bar__rec {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--cyan);
}
.demo-bar__rec-dot {
  width: 8px; height: 8px;
  background: var(--cyan);
  border-radius: 50%;
  animation: blink 1.4s var(--ease-jt) infinite;
  box-shadow: 0 0 10px var(--cyan-glow);
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50%      { opacity: 0.3; }
}
.demo__transcript {
  font-family: var(--font-serif-cn);
  font-size: var(--fs-h5);
  font-weight: 500;
  color: #F0F2FF;
  margin-bottom: var(--s-6);
  padding-left: var(--s-5);
  border-left: 2px solid var(--cyan);
  position: relative;
}
.demo__transcript .quote { color: var(--cyan); margin-right: 4px; font-family: var(--font-serif-en); }

.demo__waveform {
  height: 80px;
  margin-bottom: var(--s-6);
  position: relative;
}
.demo__waveform svg { width: 100%; height: 100%; filter: drop-shadow(0 0 6px var(--cyan-glow)); }

.demo__steps {
  display: flex;
  flex-direction: column;
  position: relative;
}
.demo-step {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  gap: var(--s-5);
  align-items: baseline;
  padding: var(--s-4) 0;
  border-top: 1px solid var(--line-hair);
  opacity: 0;
  transform: translateX(-12px);
  transition: opacity var(--t-base) var(--ease-jt), transform var(--t-base) var(--ease-jt);
}
.demo-step.is-visible { opacity: 1; transform: translateX(0); }
.demo-step__time {
  font-family: var(--font-mono);
  font-size: var(--fs-mini);
  color: var(--cyan);
}
.demo-step__what {
  font-size: var(--fs-body);
  color: #F0F2FF;
}
.demo-step__module {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-mono);
  color: var(--gray-4);
  text-transform: uppercase;
}
.demo__close {
  margin-top: var(--s-6);
  padding-top: var(--s-5);
  border-top: 1px solid var(--line-fine);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.demo__close-text {
  font-family: var(--font-serif-cn);
  font-size: var(--fs-h6);
  font-weight: 500;
  color: var(--cyan);
  text-shadow: 0 0 12px var(--cyan-glow);
}
.demo__close-text::before {
  content: '✓';
  margin-right: 8px;
  font-family: var(--font-mono);
}
.demo__close-meta {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-mono);
  color: var(--gray-4);
  text-transform: uppercase;
}

/* ============================================================
 * S7 · 员工：声纹档案墙
 * ============================================================ */
.s-roster__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border: 1px solid var(--line-fine);
  margin-top: var(--s-9);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.emp-card {
  position: relative;
  padding: var(--s-6);
  border-right: 1px solid var(--line-fine);
  border-bottom: 1px solid var(--line-fine);
  cursor: pointer;
  transition: background var(--t-base) var(--ease-jt), transform var(--t-base) var(--ease-jt);
  background: rgba(17, 22, 58, 0.4);
  overflow: hidden;
}
.emp-card:nth-child(3n) { border-right: none; }
.emp-card:nth-last-child(-n+3) { border-bottom: none; }
.emp-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 100%, var(--cyan-soft), transparent 70%);
  opacity: 0;
  transition: opacity var(--t-base) var(--ease-jt);
  pointer-events: none;
}
.emp-card:hover {
  background: rgba(35, 42, 101, 0.7);
}
.emp-card:hover::before { opacity: 1; }
.emp-card:hover .emp-card__id { color: var(--cyan); }
.emp-card:hover .emp-card__waveform path { stroke: var(--cyan); }
.emp-card__id {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-mono);
  color: var(--gray-3);
  margin-bottom: var(--s-4);
  display: flex;
  justify-content: space-between;
  text-transform: uppercase;
  transition: color var(--t-base) var(--ease-jt);
  position: relative;
}
.emp-card__id-status {
  display: inline-flex; align-items: center; gap: 6px;
  color: var(--cyan);
}
.emp-card__id-status::before {
  content: '';
  width: 6px; height: 6px;
  background: var(--cyan);
  border-radius: 50%;
  box-shadow: 0 0 6px var(--cyan-glow);
}
.emp-card__name {
  font-family: var(--font-serif-cn);
  font-size: var(--fs-h4);
  font-weight: 500;
  color: #F0F2FF;
  margin-bottom: var(--s-1);
  line-height: var(--lh-snug);
  position: relative;
}
.emp-card__role {
  font-family: var(--font-serif-en);
  font-size: var(--fs-mini);
  font-style: italic;
  color: var(--gray-4);
  margin-bottom: var(--s-5);
  position: relative;
}
.emp-card__waveform {
  height: 40px;
  margin-bottom: var(--s-5);
  position: relative;
}
.emp-card__waveform svg { width: 100%; height: 100%; overflow: visible; filter: drop-shadow(0 0 4px transparent); transition: filter var(--t-base) var(--ease-jt); }
.emp-card:hover .emp-card__waveform svg { filter: drop-shadow(0 0 6px var(--cyan-glow)); }
.emp-card__waveform path {
  fill: none;
  stroke: var(--gray-4);
  stroke-width: 1.2;
  transition: stroke var(--t-base) var(--ease-jt);
}
.emp-card__skills {
  font-size: var(--fs-mini);
  color: var(--gray-5);
  line-height: var(--lh-loose);
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 2px;
  position: relative;
}
.emp-card__skills li::before {
  content: '·  ';
  color: var(--gray-3);
}
.emp-card__cta {
  margin-top: var(--s-6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-mono);
  color: var(--gray-4);
  text-transform: uppercase;
  position: relative;
}
.emp-card__cta-arrow {
  display: inline-block;
  transition: transform var(--t-base) var(--ease-jt);
}
.emp-card:hover .emp-card__cta-arrow { transform: translateX(4px); color: var(--cyan); }

/* ============================================================
 * S8 · 数据冲击屏
 * ============================================================ */
.s-numbers { padding: var(--s-11) 0; }
.s-numbers__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--s-5);
  margin-top: var(--s-9);
}
.metric {
  display: flex;
  flex-direction: column;
  gap: var(--s-3);
  padding: var(--s-5) 0;
  border-top: 1px solid var(--cyan);
  position: relative;
  box-shadow: 0 -1px 0 0 var(--cyan-glow);
}
.metric::before {
  content: '';
  position: absolute;
  left: 0; right: 0; top: -1px;
  height: 1px;
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan-glow);
}
.metric__value {
  font-family: var(--font-serif-en);
  font-size: var(--fs-mega);
  font-weight: 300;
  line-height: 0.9;
  letter-spacing: -0.04em;
  color: #F0F2FF;
  font-feature-settings: 'tnum';
  display: flex;
  align-items: flex-start;
  text-shadow: 0 0 24px rgba(123, 226, 214, 0.18);
}
.metric__unit {
  font-size: 0.42em;
  color: var(--cyan);
  margin-left: 4px;
  margin-top: 0.2em;
}
.metric__label {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-mono);
  color: var(--gray-4);
  text-transform: uppercase;
}
.metric__hint {
  font-size: var(--fs-mini);
  color: var(--gray-5);
  line-height: var(--lh-snug);
}

/* ============================================================
 * S9 · 三阶愿景
 * ============================================================ */
.s-vision { padding-bottom: var(--s-10); }
.timeline {
  margin-top: var(--s-9);
  position: relative;
}
.timeline__rail {
  position: absolute;
  left: 0; right: 0; top: 36px;
  height: 1px;
  background: var(--line-fine);
}
.timeline__rail::after {
  content: '';
  position: absolute; left: 0; top: 0;
  width: var(--rail-progress, 0%);
  height: 1px;
  background: var(--cyan);
  box-shadow: 0 0 8px var(--cyan-glow);
  transition: width 1.6s var(--ease-jt);
}
.timeline__row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--s-7);
  position: relative;
}
.phase {
  position: relative;
  padding-top: 60px;
}
.phase__node {
  position: absolute;
  top: 28px; left: 0;
  width: 16px; height: 16px;
  border: 1px solid var(--line-mid);
  background: var(--ink);
  display: flex; align-items: center; justify-content: center;
  transition: border-color var(--t-base) var(--ease-jt);
}
.phase__node::after {
  content: '';
  width: 6px; height: 6px;
  background: var(--gray-3);
  transition: background var(--t-base) var(--ease-jt), box-shadow var(--t-base) var(--ease-jt);
}
.phase.is-on .phase__node {
  border-color: var(--cyan);
  box-shadow: 0 0 16px var(--cyan-glow);
}
.phase.is-on .phase__node::after {
  background: var(--cyan);
  box-shadow: 0 0 12px var(--cyan-glow);
}
.phase__index {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-mono);
  color: var(--gray-4);
  text-transform: uppercase;
  margin-bottom: var(--s-3);
}
.phase.is-on .phase__index { color: var(--cyan); }
.phase__name {
  font-family: var(--font-serif-cn);
  font-size: var(--fs-h4);
  font-weight: 500;
  margin-bottom: var(--s-2);
  line-height: var(--lh-snug);
  color: #F0F2FF;
}
.phase__when {
  font-family: var(--font-serif-en);
  font-size: var(--fs-mini);
  font-style: italic;
  color: var(--gray-4);
  margin-bottom: var(--s-5);
}
.phase__body {
  font-size: var(--fs-mini);
  color: var(--gray-5);
  line-height: var(--lh-loose);
}

/* ============================================================
 * S10 · CTA 收束
 * ============================================================ */
.s-cta {
  padding: var(--s-11) 0 var(--s-9);
  text-align: center;
  position: relative;
  border-top: 1px solid var(--line-hair);
}
.s-cta::before {
  content: '';
  position: absolute;
  left: 50%; top: 30%;
  transform: translateX(-50%);
  width: 80vw; height: 80vh;
  max-width: 1200px;
  background: radial-gradient(circle, rgba(123, 226, 214, 0.07), transparent 60%);
  pointer-events: none;
  filter: blur(40px);
}
.s-cta__title {
  font-family: var(--font-serif-cn);
  font-size: clamp(48px, 6vw, 96px);
  font-weight: 500;
  line-height: var(--lh-tight);
  letter-spacing: var(--ls-tight);
  margin-bottom: var(--s-7);
  color: #F0F2FF;
  position: relative;
}
.s-cta__form {
  display: inline-flex;
  align-items: center;
  gap: 0;
  border: 1px solid var(--line-mid);
  padding: 4px;
  margin-bottom: var(--s-6);
  background: rgba(17, 22, 58, 0.7);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  position: relative;
  transition: border-color var(--t-base) var(--ease-jt);
}
.s-cta__form:focus-within {
  border-color: var(--cyan);
  box-shadow: 0 0 24px var(--cyan-glow);
}
.s-cta__form-mic {
  width: 44px; height: 44px;
  display: inline-flex;
  justify-content: center; align-items: center;
  border-right: 1px solid var(--line-fine);
  cursor: pointer;
  color: var(--cyan);
  transition: background var(--t-base) var(--ease-jt);
}
.s-cta__form-mic:hover { background: var(--cyan-soft); }
.s-cta__form-input {
  width: 460px;
  max-width: 60vw;
  padding: 0 var(--s-5);
  background: transparent;
  border: none;
  outline: none;
  font-family: var(--font-sans-cn);
  font-size: var(--fs-body);
  color: #F0F2FF;
}
.s-cta__form-input::placeholder { color: var(--gray-3); }
.s-cta__form-submit {
  height: 44px;
  padding: 0 var(--s-5);
  background: var(--cyan);
  color: var(--ink);
  font-family: var(--font-sans-cn);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  transition: background var(--t-quick) var(--ease-jt), box-shadow var(--t-quick) var(--ease-jt);
}
.s-cta__form-submit:hover {
  background: var(--cyan-bright);
  box-shadow: 0 0 16px var(--cyan-glow);
}
.s-cta__hint {
  font-family: var(--font-mono);
  font-size: var(--fs-micro);
  letter-spacing: var(--ls-mono);
  color: var(--gray-4);
  text-transform: uppercase;
}

/* ============================================================
 * 响应式
 * ============================================================ */
@media (max-width: 1100px) {
  .hero__inner { grid-template-columns: 1fr; }
  .hero__stage { max-height: 50vh; aspect-ratio: 16/10; }
  .s-arch__grid { grid-template-columns: 1fr; }
  .layer__detail { position: static; padding-left: 0; border-left: none; border-top: 1px solid var(--line-fine); padding-top: var(--s-5); }
}
@media (max-width: 900px) {
  .s-now__grid { grid-template-columns: 1fr; }
  .s-pain__grid { grid-template-columns: 1fr 1fr; }
  .engine:nth-child(2) { border-right: none; }
  .engine:nth-child(-n+2) { border-bottom: 1px solid var(--line-fine); }
  .s-roster__grid { grid-template-columns: 1fr 1fr; }
  .emp-card:nth-child(3n) { border-right: 1px solid var(--line-fine); }
  .emp-card:nth-child(2n) { border-right: none; }
  .emp-card:nth-last-child(-n+3) { border-bottom: 1px solid var(--line-fine); }
  .emp-card:nth-last-child(-n+2) { border-bottom: none; }
  .s-numbers__grid { grid-template-columns: 1fr 1fr; }
  .timeline__row { grid-template-columns: 1fr; gap: var(--s-7); }
  .timeline__rail { display: none; }
}
@media (max-width: 640px) {
  .s-pain__grid, .s-roster__grid, .s-numbers__grid { grid-template-columns: 1fr; }
  .engine, .emp-card { border-right: none !important; border-bottom: 1px solid var(--line-fine) !important; }
  .demo-step { grid-template-columns: 60px 1fr; }
  .demo-step__module { grid-column: 2; grid-row: 2; padding-left: 60px; }

  /* —— 各 section 的内边距压缩 —— */
  .scene { padding: 88px 0 var(--s-7); }
  .hero { min-height: auto; padding: 100px 0 var(--s-7); }
  .hero__copy { padding-bottom: var(--s-5); }
  .hero__stage { max-height: 38vh; aspect-ratio: 1/1; }
  .hero__title { font-size: clamp(34px, 9vw, 48px); }
  .scroll-hint { display: none; }

  /* —— 章节标题统一收缩 —— */
  .section-title { font-size: clamp(28px, 6.5vw, 44px); max-width: 100% !important; }
  .s-shift__line { font-size: clamp(28px, 8vw, 48px); }

  /* —— Hero meta 压缩 —— */
  .hero__meta { gap: var(--s-3); flex-direction: column; }

  /* —— 病灶引擎：4×1 改 1 列 + 紧凑 padding —— */
  .engine { padding: var(--s-5) var(--s-4); }
  .engine__title { font-size: var(--fs-h6); }

  /* —— 数据冲击屏：每个数字单列 —— */
  .metric__value { font-size: clamp(56px, 18vw, 96px); }
  .metric { padding: var(--s-4) 0; }

  /* —— 演示区：缩小内边距 + 时间步堆叠 —— */
  .s-demo__stage { padding: var(--s-5) var(--s-4); }
  .demo__transcript { font-size: var(--fs-h6); padding-left: var(--s-3); }
  .demo-step { gap: var(--s-3); padding: var(--s-3) 0; }
  .demo__close { flex-direction: column; align-items: flex-start; gap: var(--s-3); }

  /* —— 架构层级 —— */
  .layer { padding: var(--s-4) var(--s-4); grid-template-columns: auto 1fr; }
  .layer__tag { display: none; }
  .layer__name { font-size: var(--fs-body); }

  /* —— 时间轴 —— */
  .phase { padding-top: 40px; }
  .phase__node { top: 12px; }
  .phase__name { font-size: var(--fs-h5); }

  /* —— CTA 表单 —— */
  .s-cta { padding: var(--s-9) 0 var(--s-7); }
  .s-cta__form { flex-wrap: wrap; max-width: 100%; }
  .s-cta__form-input { width: 100%; max-width: none; padding: 12px var(--s-4); }
  .s-cta__form-submit { width: 100%; }
  .s-cta__form-mic { width: 100%; height: 40px; border-right: none; border-bottom: 1px solid var(--line-fine); }
}