.page-home {
  --home-red: #E53935;
  --home-blue: #1E88E5;
  --home-yellow: #FFC107;
  --home-bg-dark: #212121;
  --home-bg-card: #2C2C2C;
  --home-text-primary: #FFFFFF;
  --home-text-secondary: #B0BEC5;
  --home-font-heading: Impact, 'Montserrat Black', sans-serif;
  --home-font-body: Inter, system-ui, sans-serif;
  --home-line-grad: linear-gradient(135deg, #E53935, #1E88E5);
  --home-transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  display: block;
}

/* ===== 滚动进度条 ===== */
.home-scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1001;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--home-red), var(--home-blue), var(--home-yellow));
  transform-origin: left center;
  transform: scaleX(0);
  will-change: transform;
  pointer-events: none;
}

@supports (animation-timeline: scroll()) {
  .home-scroll-progress {
    animation: homeProgress linear forwards;
    animation-timeline: scroll(root);
  }
}

@keyframes homeProgress {
  from { transform: scaleX(0); }
  to { transform: scaleX(1); }
}

/* ===== Hero 首屏 ===== */
.home-hero {
  position: relative;
  background: var(--home-bg-dark);
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding: 80px 0 60px;
}

.home-hero__grid-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}

.home-hero__speedlines {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  overflow: hidden;
}

.speedline {
  position: absolute;
  height: 2px;
  width: 120px;
  opacity: 0.15;
  transform: rotate(-25deg);
}

.speedline--red {
  background: var(--home-red);
  top: 20%;
  right: -20px;
  width: 180px;
}

.speedline--blue {
  background: var(--home-blue);
  bottom: 30%;
  left: -30px;
  width: 220px;
}

.speedline--red:nth-child(3) {
  top: 55%;
  right: 10%;
  width: 100px;
}

.speedline--blue:nth-child(4) {
  top: 10%;
  left: 25%;
  width: 80px;
}

.speedline--red:nth-child(5) {
  bottom: 15%;
  right: 30%;
  width: 140px;
}

.home-hero__bg-img {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.08;
  pointer-events: none;
}

.home-hero .container {
  position: relative;
  z-index: 2;
  width: 100%;
  max-width: var(--container-max, 1280px);
  margin: 0 auto;
  padding: 0 var(--container-padding, 20px);
}

.home-hero__intro {
  margin-bottom: 48px;
  text-align: left;
}

.home-hero__title {
  font-family: var(--home-font-heading);
  font-size: clamp(36px, 8vw, 72px);
  color: var(--home-red);
  text-transform: uppercase;
  transform: rotate(-3deg);
  transform-origin: left center;
  letter-spacing: 0.02em;
  line-height: 1.1;
  margin: 0 0 12px;
  text-shadow: 2px 2px 0 rgba(0,0,0,0.3);
}

.home-hero__subtitle {
  font-family: var(--home-font-body);
  font-size: clamp(16px, 2.5vw, 22px);
  color: var(--home-text-secondary);
  font-weight: 400;
  margin: 0;
  letter-spacing: 0.08em;
}

/* ===== 翻页卡片 ===== */
.home-hero__cards {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  justify-content: center;
  perspective: 1200px;
}

.card-flip {
  flex: 0 1 320px;
  min-width: 260px;
  perspective: 1000px;
  animation: homeCardEntry 0.9s cubic-bezier(0.25, 0.46, 0.45, 0.94) backwards;
}

.card-flip:nth-child(1) { animation-delay: 0.15s; }
.card-flip:nth-child(2) { animation-delay: 0.45s; }
.card-flip:nth-child(3) { animation-delay: 0.75s; }

@keyframes homeCardEntry {
  from {
    transform: rotateY(95deg) translateZ(-60px);
    opacity: 0;
  }
  to {
    transform: rotateY(0) translateZ(0);
    opacity: 1;
  }
}

.card-flip__inner {
  position: relative;
  width: 100%;
  height: 420px;
  transition: transform 0.7s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  transform-style: preserve-3d;
  cursor: default;
}

.card-flip:hover .card-flip__inner,
.card-flip:focus-within .card-flip__inner {
  transform: rotateY(180deg);
}

.card-flip__front,
.card-flip__back {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
  border-radius: 4px;
  overflow: hidden;
}

.card-flip__front {
  background: var(--home-bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
}

.card-flip__bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.12;
  pointer-events: none;
}

.card-flip__content {
  position: relative;
  z-index: 1;
  padding: 28px 24px 32px;
  background: linear-gradient(transparent 20%, rgba(33,33,33,0.92) 70%);
}

.card-flip__index {
  font-family: 'Courier New', monospace;
  font-size: 14px;
  color: var(--home-blue);
  letter-spacing: 0.1em;
  display: block;
  margin-bottom: 8px;
}

.card-flip__heading {
  font-family: var(--home-font-heading);
  font-size: 28px;
  color: var(--home-text-primary);
  margin: 0 0 8px;
  line-height: 1.15;
  letter-spacing: 0.02em;
}

.card-flip__desc {
  font-family: var(--home-font-body);
  font-size: 15px;
  color: var(--home-text-secondary);
  margin: 0 0 16px;
  line-height: 1.5;
}

.card-flip__link {
  display: inline-block;
  font-family: var(--home-font-body);
  font-size: 14px;
  font-weight: 600;
  color: var(--home-yellow);
  text-decoration: none;
  border-bottom: 2px solid var(--home-yellow);
  padding-bottom: 2px;
  transition: color var(--home-transition), border-color var(--home-transition);
}

.card-flip__link:hover,
.card-flip__link:focus {
  color: var(--home-red);
  border-color: var(--home-red);
}

.card-flip__back {
  background: var(--home-line-grad);
  transform: rotateY(180deg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 32px;
}

.card-flip__back-content {
  text-align: center;
  color: var(--home-text-primary);
}

.card-flip__back-text {
  font-family: var(--home-font-body);
  font-size: 16px;
  line-height: 1.6;
  margin: 0 0 24px;
  opacity: 0.95;
}

/* ===== 时间轴 ===== */
.home-timeline {
  background: var(--home-bg-dark);
  padding: 64px 0 80px;
  border-top: 1px solid rgba(255,255,255,0.05);
}

.home-timeline__title {
  font-family: var(--home-font-heading);
  font-size: clamp(28px, 5vw, 44px);
  color: var(--home-text-primary);
  margin: 0 0 48px;
  letter-spacing: 0.02em;
  transform: rotate(-2deg);
  transform-origin: left center;
}

.home-timeline__track {
  position: relative;
  padding-left: 32px;
}

.home-timeline__line {
  position: absolute;
  left: 14px;
  top: 8px;
  bottom: 8px;
  width: 3px;
  background: var(--home-line-grad);
  border-radius: 2px;
  opacity: 0.5;
}

.timeline-item {
  position: relative;
  display: flex;
  gap: 20px;
  margin-bottom: 36px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.timeline-item:last-child {
  margin-bottom: 0;
}

.timeline-item:hover {
  transform: translateX(6px);
}

.timeline-item__dot {
  flex: 0 0 12px;
  height: 12px;
  margin-top: 6px;
  border-radius: 50%;
  background: var(--home-yellow);
  border: 2px solid var(--home-red);
  box-shadow: 0 0 0 4px rgba(229,57,53,0.15);
  z-index: 1;
}

.timeline-item__body {
  flex: 1;
  min-width: 0;
}

.timeline-item__heading {
  font-family: var(--home-font-heading);
  font-size: 20px;
  color: var(--home-text-primary);
  margin: 0 0 6px;
  letter-spacing: 0.01em;
}

.timeline-item__desc {
  font-family: var(--home-font-body);
  font-size: 15px;
  color: var(--home-text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* ===== 站内直达 ===== */
.home-quicklinks {
  background: var(--home-bg-dark);
  padding: 0 0 80px;
}

.home-quicklinks__title {
  font-family: var(--home-font-heading);
  font-size: clamp(28px, 5vw, 44px);
  color: var(--home-text-primary);
  margin: 0 0 40px;
  letter-spacing: 0.02em;
  transform: rotate(-2deg);
  transform-origin: left center;
}

.home-quicklinks__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.quicklink-card {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--home-bg-card);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: 4px;
  padding: 24px 28px;
  text-decoration: none;
  transition: background var(--home-transition), border-color var(--home-transition), transform 0.3s ease;
  cursor: pointer;
}

.quicklink-card:hover,
.quicklink-card:focus {
  background: rgba(255,255,255,0.05);
  border-color: var(--home-blue);
  transform: translateX(8px);
}

.quicklink-card__icon {
  flex: 0 0 40px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.quicklink-card__label {
  font-family: var(--home-font-heading);
  font-size: 20px;
  color: var(--home-text-primary);
  letter-spacing: 0.02em;
}

.quicklink-card__hint {
  font-family: var(--home-font-body);
  font-size: 13px;
  color: var(--home-text-secondary);
  margin-left: auto;
  white-space: nowrap;
}

/* ===== 陈述条 ===== */
.home-statement {
  background: var(--home-bg-dark);
  padding: 0 0 40px;
  border-top: 1px solid rgba(255,255,255,0.04);
}

.home-statement__text {
  font-family: var(--home-font-body);
  font-size: 13px;
  color: var(--home-text-secondary);
  text-align: center;
  margin: 0;
  opacity: 0.7;
  letter-spacing: 0.04em;
}

/* ===== 移动端适配 ===== */
@media (max-width: 767px) {
  .home-hero {
    padding: 100px 0 40px;
    min-height: auto;
  }

  .home-hero__title {
    transform: rotate(0);
    font-size: clamp(28px, 10vw, 40px);
  }

  .home-hero__subtitle {
    font-size: 14px;
  }

  .home-hero__cards {
    gap: 24px;
  }

  .card-flip {
    flex: 0 1 100%;
    max-width: 400px;
  }

  .card-flip__inner {
    height: 340px;
  }

  .card-flip__heading {
    font-size: 22px;
  }

  .card-flip__back {
    padding: 24px;
  }

  .card-flip__back-text {
    font-size: 14px;
  }

  .home-timeline {
    padding: 48px 0 56px;
  }

  .home-timeline__title {
    transform: rotate(0);
    margin-bottom: 32px;
  }

  .home-timeline__track {
    padding-left: 24px;
  }

  .timeline-item {
    gap: 14px;
  }

  .timeline-item__dot {
    flex: 0 0 10px;
    height: 10px;
    margin-top: 4px;
  }

  .timeline-item__heading {
    font-size: 17px;
  }

  .home-quicklinks {
    padding: 0 0 56px;
  }

  .home-quicklinks__title {
    transform: rotate(0);
    margin-bottom: 28px;
  }

  .quicklink-card {
    padding: 18px 20px;
    gap: 14px;
  }

  .quicklink-card__label {
    font-size: 17px;
  }

  .quicklink-card__hint {
    font-size: 12px;
  }

  .home-statement {
    padding: 0 0 28px;
  }

  .home-statement__text {
    font-size: 12px;
  }
}

@media (min-width: 768px) {
  .home-hero__cards {
    gap: 28px;
    justify-content: flex-start;
  }

  .card-flip {
    flex: 0 0 300px;
  }

  .card-flip:nth-child(2) {
    margin-top: 40px;
  }

  .card-flip:nth-child(3) {
    margin-top: 80px;
  }

  .home-quicklinks__grid {
    grid-template-columns: repeat(3, 1fr);
  }

  .quicklink-card {
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
    padding: 32px 28px;
  }

  .quicklink-card__hint {
    margin-left: 0;
    white-space: normal;
  }

  .quicklink-card:hover,
  .quicklink-card:focus {
    transform: translateY(-6px);
  }
}

@media (min-width: 1024px) {
  .card-flip {
    flex: 0 0 320px;
  }

  .card-flip__inner {
    height: 460px;
  }
}

/* ===== 减少动效适配 ===== */
@media (prefers-reduced-motion: reduce) {
  .home-scroll-progress {
    animation: none;
    transform: scaleX(0);
  }

  .card-flip {
    animation: none;
    opacity: 1;
    transform: none;
  }

  .card-flip__inner {
    transition: none;
  }

  .card-flip:hover .card-flip__inner,
  .card-flip:focus-within .card-flip__inner {
    transform: none;
  }

  .card-flip__back {
    display: none;
  }

  .timeline-item:hover {
    transform: none;
  }

  .quicklink-card:hover,
  .quicklink-card:focus {
    transform: none;
  }
}