/* ========== Chapter / fullscreen ========== */
*{font-family:"Microsoft YaHei","微软雅黑",sans-serif !important}
.chapter {
  position: relative;
  min-height: 100svh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 5rem 0;
  overflow: hidden;
}

.chapter--tight {
  min-height: auto;
  padding: clamp(5rem, 12vw, 8rem) 0;
}

/* ========== Immersive hero ========== */
.hero-x {
  position: relative;
  min-height: min(100svh, 860px);
  min-height: min(100dvh, 860px);
  display: grid;
  align-content: start;
  padding: var(--hero-top) 0 var(--hero-bottom);
  overflow: hidden;
}

.hero-x__bg {
  position: absolute;
  inset: 0;
  background: var(--hero-bg);
}

.hero-x__bg::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0.5;
  background:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='800' height='600' fill='none'%3E%3Cpath stroke='%237a9e8f' stroke-opacity='.2' d='M80 160 L180 100 L280 180 L400 90 L520 150'/%3E%3Ccircle cx='180' cy='100' r='3.5' fill='%237a9e8f' fill-opacity='.5'/%3E%3Ccircle cx='400' cy='90' r='3.5' fill='%23c4a574' fill-opacity='.45'/%3E%3Cpath d='M0 420 C160 380 240 470 380 430 C520 390 600 340 800 360 L800 600 L0 600 Z' fill='%237a9e8f' fill-opacity='.05'/%3E%3C/svg%3E")
      right 5% center / min(700px, 65vw) no-repeat;
  mask-image: linear-gradient(90deg, transparent, #000 35%);
}

.hero-x__watermark {
  position: absolute;
  left: var(--gutter);
  top: 42%;
  bottom: auto;
  transform: translateY(-20%);
  font-family: var(--font-display);
  font-size: clamp(4.5rem, 18vw, 14rem);
  font-weight: 800;
  letter-spacing: -0.06em;
  line-height: 0.85;
  color: transparent;
  -webkit-text-stroke: 1px var(--wm-stroke);
  pointer-events: none;
  user-select: none;
  z-index: 1;
}

.hero-x__content {
  position: relative;
  z-index: 2;
  width: min(100% - var(--gutter) * 2, 1320px);
  margin-inline: auto;
  display: block;
  max-width: 42rem;
}

.hero-x__main {
  position: relative;
}

.hero-x__brand {
  font-family: var(--font-display);
  font-size: clamp(1rem, 1.5vw, 1.15rem);
  font-weight: 700;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.25rem;
}

.hero-x h1 {
  font-size: clamp(2.6rem, 3.5vw, 5rem);
  max-width: 30ch;
  margin-bottom: 1.25rem;
}

.hero-x__lead {
  max-width: 32rem;
  font-size: 1.05rem;
  margin-bottom: 1.75rem;
  color: var(--paper-dim);
}

.hero-x__cta {
  margin-top: 0.25rem;
}

.scroll-cue {
  position: absolute;
  left: 50%;
  bottom: 1.5rem;
  transform: translateX(-50%);
  z-index: 3;
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--text-muted);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
}

.scroll-cue i {
  display: block;
  width: 1px;
  height: 2.5rem;
  background: linear-gradient(var(--accent), transparent);
  animation: cue 2s var(--ease) infinite;
}

@keyframes cue {
  0%,
  100% {
    opacity: 0.35;
    transform: scaleY(0.7);
  }
  50% {
    opacity: 1;
    transform: scaleY(1);
  }
}

@media (max-width: 800px) {
  .hero-x h1 {
    max-width: none;
  }

  .hero-x {
    min-height: auto;
    padding: 1.75rem 0 3rem;
  }

  .hero-x__watermark {
    font-size: clamp(3.5rem, 22vw, 6rem);
    top: 48%;
    opacity: 0.7;
  }

  .scroll-cue {
    display: none;
  }
}

/* ========== Signal rail (replaces marquee) ========== */
.signal-rail {
  border-block: 1px solid var(--line);
  background: var(--bg-elevated);
  padding: 1.15rem 0;
  position: relative;
}

.signal-rail__inner {
  width: min(100% - var(--gutter) * 2, 1320px);
  margin-inline: auto;
  display: flex;
  align-items: center;
  gap: 1.25rem 1.75rem;
  flex-wrap: wrap;
}

.signal-rail__label {
  font-family: var(--kicker-font, var(--font-body));
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--kicker-color, var(--accent));
  flex-shrink: 0;
}

.signal-rail__line {
  width: 2rem;
  height: 1px;
  background: var(--accent);
  flex-shrink: 0;
}

.signal-rail__list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0;
  flex: 1;
  min-width: 0;
}

.signal-rail__list li {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-display);
  font-size: clamp(0.85rem, 1.4vw, 1rem);
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--paper);
}

.signal-rail__list li:not(:last-child)::after {
  content: "";
  display: inline-block;
  width: 3px;
  height: 3px;
  margin: 0 0.85rem;
  border-radius: 50%;
  background: var(--accent);
  opacity: 0.7;
}

.signal-rail__list a {
  color: inherit;
  transition: color 0.2s;
  position: relative;
}

.signal-rail__list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -0.15rem;
  width: 100%;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s var(--ease);
}

.signal-rail__list a:hover {
  color: var(--accent);
}

.signal-rail__list a:hover::after {
  transform: scaleX(1);
}

@media (max-width: 640px) {
  .signal-rail__line {
    display: none;
  }

  .signal-rail__list {
    width: 100%;
  }

  .signal-rail__list li {
    font-size: 0.82rem;
  }

  .signal-rail__list li:not(:last-child)::after {
    margin: 0 0.55rem;
  }
}

/* ========== Horizontal product strip ========== */
.h-strip {
  padding: clamp(4rem, 10vw, 6.5rem) 0;
  overflow: hidden;
}

.h-strip__head {
  width: min(100% - var(--gutter) * 2, 1320px);
  margin: 0 auto 2rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: end;
  gap: 1rem;
}

.h-strip__head h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  max-width: 110ch;
}

.h-strip__hint {
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-muted);
}

.h-track {
  display: flex;
  gap: 1.25rem;
  padding: 0.5rem var(--gutter) 1.5rem;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: var(--accent) transparent;
  cursor: grab;
}

.h-track.is-dragging {
  cursor: grabbing;
  scroll-snap-type: none;
}

.h-card {
  flex: 0 0 min(78vw, 380px);
  scroll-snap-align: start;
  min-height: 420px;
  padding: 1.75rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-elevated);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  transition: border-color 0.3s, transform 0.4s var(--ease);
}

.h-card:hover {
  border-color: var(--accent-line);
}

.h-card__index {
  font-family: var(--font-display);
  font-size: 0.8rem;
  color: var(--accent);
  letter-spacing: 0.12em;
}

.h-card__visual {
  flex: 1;
  margin: 1.5rem 0;
  border-radius: 8px;
  background: var(--visual-surface);
  min-height: 160px;
}

.h-card__visual--a {
  background: var(--visual-surface);
}

.h-card__visual--b {
  background:
    radial-gradient(circle at 60% 40%, rgba(138, 115, 72, 0.22), transparent 50%),
    var(--visual-surface-alt);
}

.h-card__visual--c {
  background:
    radial-gradient(circle at 30% 60%, var(--accent-soft), transparent 55%),
    var(--visual-surface);
}

.h-card__visual--d {
  background:
    radial-gradient(circle at 35% 55%, var(--accent-soft), transparent 55%),
    var(--visual-surface-alt);
}

.h-card__visual--e {
  background:
    radial-gradient(circle at 70% 30%, rgba(138, 115, 72, 0.18), transparent 50%),
    var(--visual-surface);
}

.h-card h3 {
  font-size: 1.45rem;
  margin-bottom: 0.5rem;
}

.h-card p {
  font-size: 0.9rem;
  margin-bottom: 1.25rem;
}

.h-card__link {
  font-family: var(--font-display);
  font-size: 0.8rem;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.h-card__link:hover {
  color: var(--accent-hover);
}

/* ========== Pin story ========== */
.story {
  display: grid;
  grid-template-columns: 1fr 1fr;
  min-height: 100svh;
}

.story__sticky {
  position: sticky;
  top: 0;
  height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 3rem var(--gutter);
  background: var(--bg-elevated);
  border-right: 1px solid var(--line);
}

.story__sticky h2 {
  font-size: clamp(2rem, 3.5vw, 3rem);
  margin: 0.75rem 0 1rem;
  max-width: 10ch;
}

.story__panels {
  display: flex;
  flex-direction: column;
}

.story__panel {
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 4rem var(--gutter);
  border-bottom: 1px solid var(--line);
}

.story__panel h3 {
  font-size: 1.75rem;
  margin-bottom: 1rem;
}

.story__panel p {
  max-width: 28rem;
  font-size: 1.05rem;
}

@media (max-width: 900px) {
  .story {
    grid-template-columns: 1fr;
  }

  .story__sticky {
    position: relative;
    height: auto;
    min-height: auto;
    padding-block: 3.5rem;
    border-right: none;
    border-bottom: 1px solid var(--line);
  }

  .story__panel {
    min-height: auto;
    padding-block: 3rem;
  }
}

/* ========== News editorial ========== */
.news-x {
  padding: clamp(4.5rem, 10vw, 7rem) 0;
}

.news-x__grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 2rem 2.5rem;
  margin-top: 2.5rem;
}

.news-x__feature {
  grid-row: span 2;
  padding: 2rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: linear-gradient(165deg, rgba(122, 158, 143, 0.1), transparent 50%), var(--bg-elevated);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  min-height: 360px;
}

.news-x__feature h3 {
  font-size: 1.75rem;
  margin: 0.75rem 0;
}

.news-x__list a {
  display: block;
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--line);
}

.news-x__list a:hover h4 {
  color: var(--accent);
}

.news-x__list h4 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
  transition: color 0.2s;
}

.news-x__list time {
  font-size: 0.75rem;
  color: var(--text-muted);
}

@media (max-width: 900px) {
  .news-x__grid {
    grid-template-columns: 1fr;
  }

  .news-x__feature {
    grid-row: auto;
    min-height: 260px;
  }
}

/* ========== CTA finale ========== */
.finale {
  min-height: 80svh;
  display: flex;
  align-items: center;
  text-align: center;
  padding: 5rem 0;
  position: relative;
  overflow: hidden;
}

.finale::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 50% 60% at 50% 80%, var(--finale-glow), transparent 55%);
  border-top: 1px solid var(--line);
}

.finale .wrap {
  position: relative;
  z-index: 1;
}

.finale h2 {
  font-size: clamp(2.4rem, 5.5vw, 4.25rem);
  max-width: 112ch;
  margin: 0 auto 1rem;
}

.finale p {
  max-width: 26rem;
  margin: 0 auto 2rem;
}

/* ========== Inner page ========== */
.page-x {
  padding: var(--page-top) 0 var(--page-bottom);
  min-height: auto;
  display: flex;
  align-items: flex-start;
  position: relative;
}

.page-x::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--page-x-bg);
  z-index: -1;
}

.page-x h1 {
  font-size: clamp(2.4rem, 5vw, 3.75rem);
  max-width: 32ch;
  margin-bottom: 1rem;
}

.page-x p {
  max-width: 36rem;
  font-size: 1.05rem;
}

@media (max-width: 900px) {
  /* 移动端 body 已有 header-h padding，这里只补内容间距 */
  .page-x {
    padding: 1.75rem 0 2.5rem;
  }
}

@media (max-width: 720px) {
  .page-x h1 {
    max-width: none;
  }
}

.section-x {
  padding: clamp(3.5rem, 8vw, 6rem) 0;
}

.section-x--tight {
  padding-top: clamp(2.5rem, 5vw, 3.5rem);
}

/* 首页能力三列（轻量，非产品详情长列表） */
.home-caps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
}

.home-cap {
  padding: 1.5rem 1.35rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
  transition: border-color 0.25s;
}

.home-cap:hover {
  border-color: var(--accent-line);
}

.home-cap__idx {
  display: block;
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.14em;
  color: var(--accent);
  margin-bottom: 0.85rem;
}

.home-cap h3 {
  font-size: 1.15rem;
  margin-bottom: 0.55rem;
}

.home-cap p {
  font-size: 0.9rem;
  line-height: 1.65;
}

@media (max-width: 800px) {
  .home-caps {
    grid-template-columns: 1fr;
  }
}

.cap-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 2rem 2.5rem;
}

.cap-item h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--accent-line);
  display: inline-block;
}

.cap-item p {
  font-size: 0.9rem;
  max-width: 28rem;
}

@media (max-width: 640px) {
  .cap-grid {
    grid-template-columns: 1fr;
  }
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.15rem;
}

.price-plan {
  padding: 2rem 1.5rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-elevated);
  display: flex;
  flex-direction: column;
}

.price-plan--featured {
  border-color: var(--accent-line);
  background: linear-gradient(180deg, var(--accent-soft), transparent 40%), var(--bg-elevated);
}

.price-plan__name {
  font-family: var(--font-display);
  font-size: 1.25rem;
}

.price-plan__badge {
  display: inline-block;
  margin-bottom: 0.65rem;
  padding: 0.2rem 0.55rem;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  border: 1px solid var(--accent-line);
  border-radius: 999px;
}

.price-plan--featured .price-plan__badge {
  background: var(--accent-soft);
}

.price-plan__desc {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.55;
  min-height: 2.8em;
}

.price-plan__price {
  font-family: var(--font-display);
  font-size: clamp(2rem, 3vw, 2.75rem);
  color: var(--accent);
  margin: 1rem 0 0.35rem;
}

.price-plan__price span {
  font-size: 0.85rem;
  color: var(--text-muted);
}

.price-plan ul {
  flex: 1;
  margin: 1.25rem 0 1.5rem;
}

.price-plan li {
  padding: 0.35rem 0 0.35rem 1.1rem;
  position: relative;
  font-size: 0.875rem;
  color: var(--text-secondary);
}

.price-plan li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.75rem;
  width: 0.35rem;
  height: 0.35rem;
  border-radius: 50%;
  background: var(--accent);
}

@media (max-width: 860px) {
  .pricing-grid {
    grid-template-columns: 1fr;
    max-width: 24rem;
    margin-inline: auto;
  }
}

.media-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.media-card__thumb {
  aspect-ratio: 16/10;
  margin-bottom: 1rem;
  border-radius: 8px;
  border: 1px solid var(--line);
  background:
    radial-gradient(circle at 40% 40%, var(--accent-soft), transparent 55%),
    var(--bg-soft);
}

.media-card h3 {
  font-size: 1.1rem;
  margin-bottom: 0.35rem;
}

.media-card:hover h3 {
  color: var(--accent);
}

.media-card p {
  font-size: 0.875rem;
}

@media (max-width: 860px) {
  .media-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 520px) {
  .media-grid {
    grid-template-columns: 1fr;
  }
}

.content-list a {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 1rem;
  align-items: start;
  padding: 1.15rem 0;
  border-bottom: 1px solid var(--line);
}

.content-list a:hover h3 {
  color: var(--accent);
}

.content-list h3 {
  font-size: 1.05rem;
  font-weight: 600;
  transition: color 0.2s;
}

.content-list time {
  font-size: 0.85rem;
  color: var(--text-muted);
  white-space: nowrap;
}

.content-list__body p {
  margin-top: 0.4rem;
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.55;
  max-width: 42rem;
}

.content-list__tag {
  display: inline-block;
  margin-bottom: 0.35rem;
  font-size: 0.7rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
}

/* ========== News page extras ========== */
.news-feature {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(1.5rem, 4vw, 2.75rem);
  align-items: stretch;
  padding: 1.75rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: linear-gradient(145deg, rgba(122, 158, 143, 0.1), transparent 45%), var(--bg-elevated);
  margin-bottom: 2.5rem;
}

.news-feature__visual {
  min-height: 240px;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: var(--visual-surface-alt);
  position: relative;
  overflow: hidden;
}

.news-feature__visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='400' height='280' fill='none'%3E%3Cpath stroke='%237a9e8f' stroke-opacity='.4' d='M30 180 C100 80 160 200 230 110 C300 30 350 140 380 90'/%3E%3Ccircle cx='100' cy='120' r='4' fill='%237a9e8f'/%3E%3Ccircle cx='230' cy='110' r='4' fill='%23c4a574'/%3E%3C/svg%3E") center / cover no-repeat;
  opacity: 0.85;
}

.news-feature__body {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.news-feature__meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
  margin-bottom: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.news-feature__meta .tag {
  color: var(--accent);
  border: 1px solid var(--accent-line);
  border-radius: 999px;
  padding: 0.15rem 0.55rem;
}

.news-feature h2 {
  font-size: clamp(1.4rem, 2.5vw, 1.85rem);
  margin-bottom: 0.75rem;
  max-width: 18ch;
}

.news-feature p {
  font-size: 0.95rem;
  color: var(--text-secondary);
  margin-bottom: 1.25rem;
  max-width: 36rem;
}

.news-topics {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.5rem;
}

.news-topics a {
  padding: 0.35rem 0.85rem;
  font-size: 0.8rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--paper-dim);
  transition: border-color 0.2s, color 0.2s;
}

.news-topics a:hover {
  border-color: var(--accent-line);
  color: var(--accent);
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
  align-items: center;
  margin: 0 0 1.75rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.article-meta .tag {
  color: var(--accent);
  border: 1px solid var(--accent-line);
  border-radius: 999px;
  padding: 0.15rem 0.55rem;
}

/* ========== Article detail layout ========== */
.article-page {
  padding: var(--page-top) 0 var(--page-bottom);
  position: relative;
}

.article-page::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--page-x-bg);
  z-index: -1;
  height: min(52vh, 420px);
}

.article-page__head {
  margin-bottom: 2rem;
}

.article-page__head h1 {
  font-size: clamp(2rem, 4.2vw, 3.15rem);
  max-width: 22ch;
  line-height: var(--heading-lh, 1.12);
  margin-bottom: 1.15rem;
}

.article-page__lead {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 42rem;
  line-height: 1.7;
  margin-bottom: 1.5rem;
}

.article-cover {
  aspect-ratio: 21 / 9;
  margin: 0 0 2.5rem;
  border-radius: 12px;
  border: 1px solid var(--line);
  background: var(--visual-surface-alt);
  position: relative;
  overflow: hidden;
}

.article-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 30% 45%, var(--accent-soft), transparent 50%),
    linear-gradient(180deg, transparent 55%, rgba(0, 0, 0, 0.12));
  pointer-events: none;
}

.article-body {
  display: grid;
  gap: clamp(2rem, 5vw, 3.5rem);
  align-items: start;
}

.article-toc {
  position: sticky;
  top: 5.5rem;
  padding: 1rem 0 1rem 1rem;
  border-left: 1px solid var(--line);
}

.article-toc__label {
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 0.85rem;
}

.article-toc a {
  display: block;
  font-size: 0.82rem;
  color: var(--text-secondary);
  padding: 0.35rem 0;
  line-height: 1.4;
  transition: color 0.2s;
}

.article-toc a:hover {
  color: var(--accent);
}

.article-callout {
  margin: 2.5rem 0;
  padding: 1.5rem 1.6rem;
  border: 1px solid var(--accent-line);
  border-radius: 12px;
  background: linear-gradient(145deg, var(--accent-soft), transparent 55%), var(--bg-elevated);
}

.article-callout h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.article-callout p {
  margin: 0 0 1.15rem;
  font-size: 0.95rem;
  color: var(--text-secondary);
}

.article-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 3rem;
  padding-top: 1.75rem;
  border-top: 1px solid var(--line);
}

.article-nav a {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  max-width: 16rem;
  padding: 0.85rem 0;
  transition: color 0.2s;
}

.article-nav a:hover {
  color: var(--accent);
}

.article-nav__label {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.06em;
}

.article-nav__title {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--paper);
}

.article-nav a:hover .article-nav__title {
  color: var(--accent);
}

.article-nav__next {
  text-align: right;
  margin-left: auto;
}

.news-related {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1.5rem;
}

.news-related a {
  display: block;
  padding: 1.15rem 1.2rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-elevated);
  transition: border-color 0.2s;
}

.news-related a:hover {
  border-color: var(--accent-line);
}

.news-related h3 {
  font-size: 0.95rem;
  margin: 0.4rem 0;
}

.news-related p {
  font-size: 0.8rem;
  color: var(--text-secondary);
}

@media (max-width: 900px) {
  .article-body {
    grid-template-columns: 1fr;
  }

  .article-toc {
    display: none;
  }

  .article-page {
    padding-top: 1.5rem;
  }

  .article-page__head h1 {
    max-width: none;
    font-size: clamp(1.75rem, 7vw, 2.4rem);
  }

  .article-page__lead {
    font-size: 1rem;
  }

  .article-cover {
    aspect-ratio: 16 / 9;
    margin-bottom: 1.75rem;
    border-radius: 10px;
  }

  .article-nav {
    flex-direction: column;
    gap: 0;
  }

  .article-nav a,
  .article-nav__next {
    max-width: none;
    text-align: left;
    margin-left: 0;
    width: 100%;
    border-bottom: 1px solid var(--line);
  }

  .article-nav a:last-child {
    border-bottom: none;
  }

  .article-callout {
    padding: 1.25rem 1.15rem;
  }

  .article-callout .btn-row .btn {
    flex: 1 1 auto;
    min-width: calc(50% - 0.5rem);
  }
}

@media (max-width: 860px) {
  .news-feature {
    grid-template-columns: 1fr;
    padding: 1.15rem;
  }

  .news-feature__visual {
    min-height: 180px;
  }

  .news-related {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .content-list a {
    grid-template-columns: 1fr;
    gap: 0.35rem;
  }

  .content-list time {
    order: -1;
    font-size: 0.75rem;
  }

  .btn-row {
    gap: 0.6rem;
  }

  .btn-row .btn {
    flex: 1 1 calc(50% - 0.4rem);
  }

  .section-x {
    padding: clamp(2.75rem, 8vw, 4rem) 0;
  }

  .pricing-grid {
    max-width: none;
  }

  .news-feature h2 {
    max-width: none;
  }

  .finale {
    min-height: auto;
    padding: 4rem 0;
  }

  .finale h2 {
    max-width: none;
    font-size: clamp(1.85rem, 8vw, 2.6rem);
  }

  .pd-live__actions .btn {
    flex: 1 1 auto;
  }

  .tabs {
    flex-wrap: nowrap;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }

  .tabs::-webkit-scrollbar {
    display: none;
  }

  .tabs__btn {
    flex: 0 0 auto;
  }

  .compare-wrap {
    margin-inline: calc(var(--gutter) * -0.25);
    border-radius: 8px;
  }
}

.tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  margin-bottom: 1.75rem;
  border-bottom: 1px solid var(--line);
  padding-bottom: 0.5rem;
}

.tabs__btn {
  padding: 0.5rem 1rem;
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--text-muted);
  border-radius: 4px;
}

.tabs__btn.is-active {
  color: var(--accent);
  background: var(--accent-soft);
}

.tab-panel {
  display: none;
}

.tab-panel.is-active {
  display: block;
}

.help-cats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.15rem;
}

.help-cat {
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg-elevated);
}

.help-cat:hover {
  border-color: var(--accent-line);
}

.help-cat h3 {
  font-size: 1.2rem;
  margin-bottom: 0.45rem;
}

@media (max-width: 720px) {
  .help-cats {
    grid-template-columns: 1fr;
  }
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 2.5rem;
}

.contact-info h3 {
  font-size: 1.15rem;
  margin: 1.5rem 0 0.4rem;
}

.contact-info h3:first-child {
  margin-top: 0;
}

@media (max-width: 720px) {
  .contact-grid {
    grid-template-columns: 1fr;
  }
}

.demo-note {
  margin-top: 2rem;
  padding: 1.15rem 1.25rem;
  border-left: 2px solid var(--accent);
  background: var(--accent-soft);
  font-size: 0.9rem;
  color: var(--text-secondary);
}

.demo-note code {
  color: var(--accent-hover);
  font-family: ui-monospace, Menlo, monospace;
  font-size: 0.9em;
}

.scene-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 1.25rem;
}

.scene-chip {
  padding: 0.35rem 0.8rem;
  font-size: 0.75rem;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--paper-dim);
}

.compare-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: 10px;
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 520px;
  font-size: 0.875rem;
}

.compare-table th,
.compare-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--line);
  text-align: left;
}

.compare-table th {
  background: var(--bg-soft);
  font-family: var(--font-display);
}

.compare-table .yes {
  color: var(--accent);
}