/* ==========================================================================
   home.css — 首页与通用营销区块
   ========================================================================== */

/* --------------------------------------------------------------------------
   01. Hero
   -------------------------------------------------------------------------- */

.hero {
  position: relative;
  overflow: hidden;
  padding: calc(var(--nav-h) + clamp(48px, 6vw, 86px)) 0 clamp(56px, 7vw, 92px);
  background: #fff;
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to right, rgba(12, 13, 18, 0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(12, 13, 18, 0.045) 1px, transparent 1px);
  background-size: 76px 76px;
  mask-image: radial-gradient(ellipse 90% 80% at 48% 18%, #000 22%, transparent 74%);
  -webkit-mask-image: radial-gradient(ellipse 90% 80% at 48% 18%, #000 22%, transparent 74%);
  pointer-events: none;
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(60px);
  pointer-events: none;
}

.orb--1 {
  top: -140px;
  right: -60px;
  width: 520px;
  height: 520px;
  background: radial-gradient(circle, rgba(75, 69, 255, 0.17), transparent 68%);
}

.orb--2 {
  bottom: -180px;
  left: -140px;
  width: 460px;
  height: 460px;
  background: radial-gradient(circle, rgba(124, 99, 255, 0.13), transparent 68%);
}

.hero__inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.04fr) minmax(0, 0.96fr);
  align-items: center;
  gap: clamp(36px, 5vw, 72px);
}

.hero__copy {
  position: relative;
}

.hero h1 {
  margin-top: 22px;
  font-size: clamp(40px, 5.6vw, 76px);
  line-height: 1.04;
  letter-spacing: -0.05em;
  font-weight: 800;
}

.hero h1 > span {
  display: block;
}

.hero__sub {
  margin-top: 26px;
  max-width: 560px;
  font-size: clamp(15.5px, 1.35vw, 18px);
  line-height: 1.9;
  color: var(--muted);
}

.hero__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 26px;
}

.chip {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  padding: 7px 13px;
  border: 1px solid var(--line);
  border-radius: var(--r-full);
  background: rgba(255, 255, 255, 0.72);
  font-size: 12.5px;
  color: var(--ink-2);
  backdrop-filter: blur(6px);
  transition: border-color 0.2s var(--ease), color 0.2s var(--ease);
}

.chip .dot {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--brand);
  opacity: 0.8;
}

.chip:hover {
  border-color: rgba(75, 69, 255, 0.35);
  color: var(--brand-ink);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 32px;
}

.hero__note {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 20px;
  font-size: 12px;
  color: var(--muted-2);
}

.hero__note span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.hero__note .icon {
  width: 13px;
  height: 13px;
  color: var(--success);
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 40px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
}

.hero__stat strong {
  display: block;
  font-size: clamp(22px, 2vw, 28px);
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
}

.hero__stat strong small {
  font-size: 0.55em;
  font-weight: 600;
  margin-left: 2px;
  color: var(--muted);
}

.hero__stat span {
  display: block;
  margin-top: 7px;
  font-size: 11.5px;
  color: var(--muted-2);
  letter-spacing: 0.02em;
}

/* Hero 视觉：AI 中枢面板 */
.hero__visual {
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 460px;
}

.hero__rings {
  position: absolute;
  top: 50%;
  left: 50%;
  width: min(660px, 108%);
  aspect-ratio: 1;
  transform: translate(-50%, -50%);
  pointer-events: none;
}

.hero__rings::before,
.hero__rings::after {
  content: "";
  position: absolute;
  border-radius: 50%;
}

.hero__rings::before {
  inset: 0;
  border: 1px dashed rgba(75, 69, 255, 0.16);
}

.hero__rings::after {
  inset: 12%;
  border: 1px solid rgba(12, 13, 18, 0.055);
}

.hero__rings .orbit-dot {
  position: absolute;
  top: 6.5%;
  left: 50%;
  width: 9px;
  height: 9px;
  margin-left: -4px;
  border-radius: 50%;
  background: var(--grad);
  box-shadow: 0 0 0 6px rgba(75, 69, 255, 0.1);
}

.hero__rings {
  animation: ring-spin 46s linear infinite;
}

.hero__rings::after {
  animation: none;
}

@keyframes ring-spin {
  to {
    transform: translate(-50%, -50%) rotate(360deg);
  }
}

.console {
  position: relative;
  width: 100%;
  max-width: 520px;
  padding: 1px;
  border-radius: 26px;
  background: linear-gradient(
    155deg,
    rgba(75, 69, 255, 0.34),
    rgba(255, 255, 255, 0.75) 42%,
    rgba(124, 99, 255, 0.28)
  );
  box-shadow: 0 50px 120px -40px rgba(24, 26, 60, 0.35), 0 18px 50px -30px rgba(75, 69, 255, 0.35);
}

.console__inner {
  border-radius: 25px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(20px);
}

.console__bar {
  display: flex;
  align-items: center;
  gap: 7px;
  height: 46px;
  padding: 0 16px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.8);
}

.console__dots {
  display: flex;
  gap: 5px;
}

.console__dots i {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #e3e5ec;
}

.console__dots i:first-child {
  background: #ffb4b4;
}

.console__dots i:nth-child(2) {
  background: #ffd9a0;
}

.console__dots i:nth-child(3) {
  background: #a9e8c9;
}

.console__title {
  margin-left: 6px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--muted-2);
}

.console__live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-left: auto;
  padding: 4px 9px;
  border-radius: var(--r-full);
  background: var(--success-soft);
  color: #0a8f66;
  font-size: 10px;
  font-weight: 600;
}

.console__live i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--success);
  animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%,
  100% {
    box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.35);
  }
  50% {
    box-shadow: 0 0 0 4px rgba(16, 185, 129, 0);
  }
}

.console__body {
  padding: 16px;
  background: linear-gradient(180deg, #fbfbfe 0%, #f5f6fb 100%);
}

.console__summary {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
  margin-bottom: 12px;
}

.console__summary div {
  padding: 10px 12px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid rgba(12, 13, 18, 0.06);
}

.console__summary span {
  display: block;
  font-size: 10px;
  color: var(--muted-2);
}

.console__summary strong {
  display: block;
  margin-top: 3px;
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.console__summary strong.ok {
  font-family: var(--font-sans);
  font-size: 14px;
  color: #0a8f66;
  padding-top: 3px;
}

.task {
  display: grid;
  grid-template-columns: 38px minmax(0, 1fr) auto;
  align-items: center;
  gap: 11px;
  padding: 11px 12px;
  border-radius: 14px;
  background: #fff;
  border: 1px solid rgba(12, 13, 18, 0.065);
  box-shadow: 0 8px 20px -18px rgba(12, 13, 18, 0.25);
}

.task + .task {
  margin-top: 8px;
}

.task__icon {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: var(--brand-soft);
  color: var(--brand);
}

.task__icon--green {
  background: var(--success-soft);
  color: #0a9b6e;
}

.task__icon--amber {
  background: #fff5e6;
  color: #d97706;
}

.task__icon .icon {
  width: 18px;
  height: 18px;
}

.task__name {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--ink);
}

.task__meta {
  margin-top: 2px;
  font-size: 10.5px;
  color: var(--muted-2);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.task__bar {
  height: 3px;
  margin-top: 7px;
  border-radius: 3px;
  background: #f0f1f6;
  overflow: hidden;
}

.task__bar i {
  display: block;
  height: 100%;
  border-radius: inherit;
  background: var(--grad);
  transform-origin: 0 50%;
  animation: bar-grow 1.6s var(--ease-out) both;
}

.task__bar i[data-w="68"] {
  width: 68%;
}
.task__bar i[data-w="92"] {
  width: 92%;
}
.task__bar i[data-w="54"] {
  width: 54%;
}

@keyframes bar-grow {
  from {
    transform: scaleX(0);
  }
  to {
    transform: scaleX(1);
  }
}

.task__badge {
  padding: 3px 8px;
  border-radius: var(--r-full);
  background: var(--brand-soft);
  color: var(--brand-ink);
  font-size: 9.5px;
  font-weight: 600;
  white-space: nowrap;
}

.task__badge--green {
  background: var(--success-soft);
  color: #0a8f66;
}

.console__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 12px;
  padding: 0 2px;
  font-size: 10px;
  color: var(--muted-2);
}

.console__foot .ok {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: #0a8f66;
}

.console__foot .ok .icon {
  width: 12px;
  height: 12px;
}

.float-chip {
  position: absolute;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px 10px 11px;
  border: 1px solid rgba(12, 13, 18, 0.08);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: 0 22px 50px -24px rgba(18, 20, 50, 0.35);
  backdrop-filter: blur(12px);
  animation: float-y 7s ease-in-out infinite;
}

.float-chip__icon {
  display: grid;
  place-items: center;
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: var(--grad);
  color: #fff;
}

.float-chip__icon .icon {
  width: 16px;
  height: 16px;
}

.float-chip b {
  display: block;
  font-size: 11.5px;
  font-weight: 600;
  line-height: 1.3;
}

.float-chip small {
  display: block;
  margin-top: 2px;
  font-size: 9.5px;
  color: var(--muted-2);
}

.float-chip--tl {
  top: 18px;
  left: -18px;
}

.float-chip--br {
  right: -16px;
  bottom: 34px;
  animation-delay: -3s;
}

@keyframes float-y {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

.hero__scroll {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: clamp(48px, 6vw, 76px);
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted-2);
}

.hero__scroll::after {
  content: "";
  width: 54px;
  height: 1px;
  background: linear-gradient(to right, var(--line-strong), transparent);
}

@media (max-width: 1120px) {
  .hero__inner {
    grid-template-columns: 1fr;
    gap: 56px;
  }

  .hero__copy {
    max-width: 760px;
  }

  .hero__visual {
    min-height: 0;
    padding: 12px 0 8px;
  }

  .console {
    max-width: 560px;
  }

  .float-chip--tl {
    left: 0;
  }

  .float-chip--br {
    right: 0;
  }
}

@media (max-width: 720px) {
  .hero__stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 18px 12px;
  }

  .float-chip {
    display: none;
  }

  .hero__rings {
    width: 118%;
  }

  .console__summary strong {
    font-size: 16px;
  }

  .task__meta {
    white-space: normal;
  }
}

@media (max-width: 420px) {
  .hero__actions .btn {
    width: 100%;
  }

  .console__body {
    padding: 12px;
  }

  .console__summary {
    grid-template-columns: 1fr 1fr;
  }

  .console__summary div:last-child {
    display: none;
  }
}

@media (max-width: 360px) {
  .hero h1 {
    font-size: 34px;
  }
}

/* --------------------------------------------------------------------------
   02. 行业跑马灯
   -------------------------------------------------------------------------- */

.marquee {
  display: flex;
  align-items: stretch;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.marquee__label {
  display: flex;
  align-items: center;
  flex: none;
  padding: 0 26px;
  border-right: 1px solid var(--line);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted-2);
  white-space: nowrap;
}

.marquee__viewport {
  overflow: hidden;
  flex: 1;
  padding: 15px 0;
  mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 6%, #000 94%, transparent);
}

.marquee__track {
  display: flex;
  width: max-content;
  animation: marquee 38s linear infinite;
}

.marquee:hover .marquee__track {
  animation-play-state: paused;
}

.marquee__group {
  display: flex;
  align-items: center;
  gap: 34px;
  padding-right: 34px;
  white-space: nowrap;
  font-size: 13px;
  color: var(--ink-2);
}

.marquee__group i {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--line-strong);
}

@keyframes marquee {
  to {
    transform: translateX(-50%);
  }
}

@media (max-width: 720px) {
  .marquee__label {
    display: none;
  }

  .marquee__group {
    gap: 24px;
    padding-right: 24px;
    font-size: 12.5px;
  }
}

/* --------------------------------------------------------------------------
   03. 痛点
   -------------------------------------------------------------------------- */

.pain {
  background: var(--bg-soft);
}

.pain__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-top: clamp(38px, 5vw, 56px);
}

.pain-card {
  position: relative;
  padding: 28px 24px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: #fff;
  overflow: hidden;
  transition: transform 0.3s var(--ease), border-color 0.3s var(--ease),
    box-shadow 0.3s var(--ease);
}

.pain-card:hover {
  transform: translateY(-4px);
  border-color: rgba(75, 69, 255, 0.28);
  box-shadow: var(--shadow-md);
}

.pain-card__icon {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  border-radius: 12px;
  background: var(--bg-tint);
  color: var(--ink-2);
  transition: background 0.3s var(--ease), color 0.3s var(--ease);
}

.pain-card:hover .pain-card__icon {
  background: var(--brand-soft);
  color: var(--brand);
}

.pain-card__num {
  position: absolute;
  top: 24px;
  right: 22px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--muted-2);
  opacity: 0.7;
}

.pain-card h3 {
  margin-top: 22px;
  font-size: 17px;
  letter-spacing: -0.02em;
  font-weight: 700;
}

.pain-card p {
  margin-top: 9px;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
}

.pain__conclusion {
  position: relative;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  margin-top: 20px;
  padding: 30px 34px;
  border-radius: var(--r-lg);
  border: 1px solid rgba(75, 69, 255, 0.18);
  background: var(--grad-soft);
  color: var(--ink);
}

.pain__conclusion::before {
  content: "";
  position: absolute;
  right: -80px;
  top: -120px;
  width: 340px;
  height: 340px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124, 99, 255, 0.2), transparent 68%);
  filter: blur(10px);
  pointer-events: none;
}

.pain__conclusion p {
  position: relative;
  font-size: clamp(17px, 1.8vw, 22px);
  line-height: 1.55;
  letter-spacing: -0.02em;
  font-weight: 600;
  color: var(--ink);
}

.pain__conclusion p em {
  font-style: normal;
  color: var(--brand-ink);
}

.pain__conclusion .link-arrow {
  position: relative;
  flex: none;
  color: var(--brand-ink);
}

.pain__conclusion .link-arrow:hover {
  color: var(--brand);
}

@media (max-width: 980px) {
  .pain__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

  .pain__conclusion {
    flex-direction: column;
    align-items: flex-start;
    gap: 20px;
    padding: 26px;
  }
}

/* --------------------------------------------------------------------------
   04. 服务矩阵（Bento）
   -------------------------------------------------------------------------- */

.svc-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 14px;
  margin-top: clamp(38px, 5vw, 56px);
}

.svc-card {
  position: relative;
  display: flex;
  flex-direction: column;
  grid-column: span 3;
  min-height: 216px;
  padding: 26px 24px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: #fff;
  overflow: hidden;
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease),
    box-shadow 0.35s var(--ease);
}

.svc-card:hover {
  transform: translateY(-4px);
  border-color: rgba(75, 69, 255, 0.3);
  box-shadow: var(--shadow-md);
}

.svc-card__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.svc-card__icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 13px;
  background: var(--brand-soft);
  color: var(--brand);
  transition: background 0.3s var(--ease), color 0.3s var(--ease);
}

.svc-card:hover .svc-card__icon {
  background: var(--grad);
  color: #fff;
}

.svc-card__num {
  font-family: var(--font-mono);
  font-size: 10.5px;
  color: var(--muted-2);
  transition: opacity 0.25s var(--ease);
}

.svc-card:hover .svc-card__num {
  opacity: 0;
}

.svc-card h3 {
  margin-top: 22px;
  font-size: 19px;
  font-weight: 700;
  letter-spacing: -0.025em;
}

.svc-card p {
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

.svc-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: auto;
  padding-top: 18px;
}

.svc-card__tags span {
  padding: 4px 9px;
  border-radius: 6px;
  background: var(--bg-soft);
  font-size: 10.5px;
  color: var(--muted);
}

.svc-card__arrow {
  position: absolute;
  top: 22px;
  right: 22px;
  display: grid;
  place-items: center;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--ink);
  color: #fff;
  opacity: 0;
  transform: translate(-4px, 4px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
}

.svc-card__arrow .icon {
  width: 13px;
  height: 13px;
}

.svc-card:hover .svc-card__arrow {
  opacity: 1;
  transform: none;
}

/* 主推卡：企业 AI 搭建（浅色主推，避免大面积深底） */
.svc-card--feature {
  grid-column: span 6;
  grid-row: span 2;
  padding: 32px;
  background: linear-gradient(150deg, #f2f1ff 0%, #ffffff 46%, #f7f6ff 100%);
  border-color: rgba(75, 69, 255, 0.18);
  color: var(--ink);
  min-height: 446px;
}

.svc-card--feature::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to right, rgba(12, 13, 18, 0.05) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(12, 13, 18, 0.05) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 70% at 80% 10%, #000, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 80% 70% at 80% 10%, #000, transparent 75%);
  pointer-events: none;
}

.svc-card--feature::after {
  content: "";
  position: absolute;
  top: -140px;
  right: -100px;
  width: 380px;
  height: 380px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124, 99, 255, 0.2), transparent 66%);
  filter: blur(16px);
  pointer-events: none;
}

.svc-card--feature:hover {
  border-color: rgba(75, 69, 255, 0.4);
  box-shadow: 0 34px 80px -44px rgba(75, 69, 255, 0.4);
}

.svc-card--feature > * {
  position: relative;
  z-index: 1;
}

.svc-card--feature .svc-card__icon {
  background: var(--grad);
  color: #fff;
  border: 0;
  box-shadow: 0 12px 26px -14px rgba(75, 69, 255, 0.65);
}

.svc-card--feature:hover .svc-card__icon {
  background: var(--grad);
  color: #fff;
  transform: scale(1.04);
}

.svc-card--feature .svc-card__num {
  color: var(--muted-2);
}

.svc-card--feature .svc-card__badge {
  margin-top: 22px;
  border-color: rgba(75, 69, 255, 0.22);
  background: #fff;
  color: var(--brand-ink);
}

.svc-card--feature .svc-card__badge i {
  background: var(--brand);
  box-shadow: 0 0 0 3px rgba(75, 69, 255, 0.14);
}

.svc-card--feature .svc-card__arrow {
  display: none;
}

.svc-card__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
  padding: 5px 10px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--r-full);
  background: rgba(255, 255, 255, 0.06);
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.65);
}

.svc-card__badge i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--brand-2);
  box-shadow: 0 0 0 3px rgba(124, 99, 255, 0.18);
}

.svc-card--feature h3 {
  margin-top: 26px;
  font-size: clamp(24px, 2.4vw, 32px);
  letter-spacing: -0.035em;
  line-height: 1.2;
  color: var(--ink);
}

.svc-card--feature > p {
  margin-top: 12px;
  max-width: 420px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-2);
}

.svc-feature-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 18px;
  margin-top: 28px;
}

.svc-feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 12.5px;
  color: var(--ink-3);
}

.svc-feature-list .icon {
  width: 14px;
  height: 14px;
  margin-top: 3px;
  color: var(--brand);
}

.svc-card--feature .link-arrow {
  margin-top: auto;
  padding-top: 30px;
  color: var(--ink);
}

.svc-card--feature .link-arrow:hover {
  color: var(--brand);
}

/* 诊断 CTA 卡 */
.svc-card--cta {
  grid-column: span 6;
  justify-content: space-between;
  background: var(--grad-soft);
  border-color: rgba(75, 69, 255, 0.18);
}

.svc-card--cta:hover {
  border-color: rgba(75, 69, 255, 0.4);
}

.svc-card--cta h3 {
  margin-top: 20px;
  font-size: 22px;
}

.svc-card--cta .link-arrow {
  margin-top: 18px;
  align-self: flex-start;
}

.svc-card--cta .spark-mark {
  position: absolute;
  right: 22px;
  bottom: 20px;
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: #fff;
  color: var(--brand);
  box-shadow: var(--shadow-sm);
}

.svc-card--cta .spark-mark .icon {
  width: 24px;
  height: 24px;
}

@media (max-width: 1080px) {
  .svc-grid {
    grid-template-columns: repeat(6, 1fr);
  }

  .svc-card--feature {
    grid-column: span 6;
    grid-row: auto;
    min-height: 0;
  }

  .svc-card {
    grid-column: span 3;
  }

  .svc-card--cta {
    grid-column: span 6;
  }
}

@media (max-width: 680px) {
  .svc-grid {
    grid-template-columns: 1fr;
  }

  .svc-card,
  .svc-card--feature,
  .svc-card--cta {
    grid-column: span 1;
  }

  .svc-card {
    min-height: 200px;
  }

  .svc-card--feature {
    padding: 26px 22px;
  }

  .svc-feature-list {
    grid-template-columns: 1fr;
  }

  .svc-card--cta .spark-mark {
    display: none;
  }
}

/* --------------------------------------------------------------------------
   05. 系统架构（深色）
   -------------------------------------------------------------------------- */

.system {
  position: relative;
  overflow: hidden;
  background: linear-gradient(160deg, #171d3d 0%, #111634 48%, #131834 100%);
  color: #fff;
}

.system__bg {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(to right, rgba(255, 255, 255, 0.045) 1px, transparent 1px),
    linear-gradient(to bottom, rgba(255, 255, 255, 0.045) 1px, transparent 1px);
  background-size: 76px 76px;
  mask-image: radial-gradient(ellipse 80% 80% at 70% 20%, #000 20%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse 80% 80% at 70% 20%, #000 20%, transparent 72%);
  pointer-events: none;
}

.system__orb {
  position: absolute;
  top: -180px;
  right: -100px;
  width: 620px;
  height: 620px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(75, 69, 255, 0.3), transparent 66%);
  filter: blur(30px);
  pointer-events: none;
}

.system .container {
  position: relative;
  z-index: 1;
}

.system__grid {
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
  gap: clamp(40px, 5vw, 80px);
  align-items: start;
}

.system__intro {
  position: sticky;
  top: calc(var(--nav-h) + 40px);
}

.system .eyebrow {
  color: rgba(255, 255, 255, 0.68);
}

.system__intro h2 {
  margin-top: 20px;
  font-size: clamp(32px, 4vw, 54px);
  line-height: 1.1;
  letter-spacing: -0.04em;
  font-weight: 800;
}

.system__intro .lead {
  margin-top: 22px;
  max-width: 430px;
  font-size: 15.5px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.78);
}

.system__intro .link-arrow {
  margin-top: 30px;
  color: #fff;
}

.system__intro .link-arrow:hover {
  color: #cfcaff;
}

.system__note {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-top: 36px;
  padding: 14px 16px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.06);
  font-size: 12px;
  color: rgba(255, 255, 255, 0.72);
  max-width: 380px;
}

.system__note .icon {
  width: 16px;
  height: 16px;
  color: #9d8fff;
  flex: none;
}

.layers {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.layers::before {
  content: "";
  position: absolute;
  left: 31px;
  top: 40px;
  bottom: 40px;
  width: 1px;
  background: linear-gradient(
    to bottom,
    transparent,
    rgba(124, 99, 255, 0.45) 15%,
    rgba(124, 99, 255, 0.45) 85%,
    transparent
  );
  pointer-events: none;
}

.layer {
  position: relative;
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr);
  gap: 16px;
  padding: 22px 24px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, 0.055);
  transition: background 0.3s var(--ease), border-color 0.3s var(--ease),
    transform 0.3s var(--ease);
}

.layer:hover {
  background: rgba(255, 255, 255, 0.085);
  border-color: rgba(124, 99, 255, 0.5);
  transform: translateX(4px);
}

.layer__no {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.24);
  background: #1a2044;
  font-family: var(--font-mono);
  font-size: 11px;
  color: rgba(255, 255, 255, 0.78);
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease);
}

.layer:hover .layer__no {
  border-color: rgba(124, 99, 255, 0.65);
  color: #cfcaff;
}

.layer__head {
  display: flex;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 10px;
}

.layer__head h3 {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.layer__head span {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  color: rgba(255, 255, 255, 0.58);
  text-transform: uppercase;
}

.layer__head em {
  margin-left: auto;
  font-style: normal;
  font-size: 11px;
  color: #9d8fff;
}

.layer p {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.74);
}

.layer__chips {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 13px;
}

.layer__chips span {
  padding: 4px 9px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 10.5px;
  color: rgba(255, 255, 255, 0.78);
}

.system__stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin-top: clamp(48px, 6vw, 72px);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: var(--r-md);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.14);
}

.system__stat {
  padding: 24px;
  background: rgba(17, 22, 52, 0.9);
}

.system__stat strong {
  display: block;
  font-family: var(--font-mono);
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.system__stat strong small {
  font-family: var(--font-sans);
  font-size: 12px;
  margin-left: 3px;
  color: rgba(255, 255, 255, 0.6);
}

.system__stat span {
  display: block;
  margin-top: 7px;
  font-size: 11.5px;
  color: rgba(255, 255, 255, 0.68);
}

@media (max-width: 980px) {
  .system__grid {
    grid-template-columns: 1fr;
  }

  .system__intro {
    position: static;
  }

  .system__note {
    max-width: none;
  }
}

@media (max-width: 640px) {
  .layer {
    grid-template-columns: 38px 1fr;
    padding: 20px;
    gap: 13px;
  }

  .layer__no {
    width: 38px;
    height: 38px;
    font-size: 10px;
  }

  .layers::before {
    left: 39px;
  }

  .layer__head em {
    display: none;
  }

  .system__stats {
    grid-template-columns: 1fr 1fr;
  }
}

/* --------------------------------------------------------------------------
   06. 交付方法 / 五步
   -------------------------------------------------------------------------- */

.steps {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
  margin-top: clamp(42px, 5vw, 64px);
}

.steps::before {
  content: "";
  position: absolute;
  top: 27px;
  left: 8%;
  right: 8%;
  height: 1px;
  background: linear-gradient(to right, var(--line), rgba(75, 69, 255, 0.4), var(--line));
}

.step {
  position: relative;
}

.step__dot {
  position: relative;
  z-index: 1;
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  background: #fff;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted);
  transition: background 0.35s var(--ease), color 0.35s var(--ease),
    border-color 0.35s var(--ease), box-shadow 0.35s var(--ease),
    transform 0.35s var(--ease);
}

.step:hover .step__dot {
  transform: translateY(-3px);
  border-color: transparent;
  background: var(--grad);
  color: #fff;
  box-shadow: var(--glow);
}

.step h3 {
  margin-top: 22px;
  font-size: 16.5px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.step p {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--muted);
}

.step__time {
  display: inline-block;
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--brand-ink);
  background: var(--brand-soft);
  padding: 3px 8px;
  border-radius: 5px;
}

@media (max-width: 980px) {
  .steps {
    grid-template-columns: 1fr 1fr;
    gap: 28px 20px;
  }

  .steps::before {
    display: none;
  }
}

@media (max-width: 560px) {
  .steps {
    grid-template-columns: 1fr;
  }

  .step {
    padding-left: 72px;
  }

  .step__dot {
    position: absolute;
    left: 0;
    top: 0;
  }

  .step h3 {
    margin-top: 4px;
  }
}

/* --------------------------------------------------------------------------
   07. 场景
   -------------------------------------------------------------------------- */

.scn-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: clamp(38px, 5vw, 56px);
}

.scn-card {
  display: flex;
  flex-direction: column;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: #fff;
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease),
    box-shadow 0.35s var(--ease);
}

.scn-card:hover {
  transform: translateY(-4px);
  border-color: rgba(75, 69, 255, 0.28);
  box-shadow: var(--shadow-md);
}

.scn-card__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
}

.scn-card__icon {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 13px;
  background: var(--brand-soft);
  color: var(--brand);
}

.scn-card__tag {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted-2);
  padding: 5px 9px;
  border: 1px solid var(--line);
  border-radius: var(--r-full);
}

.scn-card h3 {
  margin-top: 20px;
  font-size: 21px;
  font-weight: 700;
  letter-spacing: -0.025em;
}

.scn-card__pain {
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

.scn-flow {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 20px;
}

.scn-flow span {
  padding: 5px 10px;
  border-radius: 7px;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  font-size: 11px;
  color: var(--ink-2);
  white-space: nowrap;
}

.scn-flow .icon {
  width: 12px;
  height: 12px;
  color: var(--muted-2);
  opacity: 0.7;
}

.scn-card__foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: 22px;
  padding-top: 22px;
  border-top: 1px dashed var(--line);
}

.scn-card__foot small {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.1em;
  color: var(--muted-2);
  text-transform: uppercase;
}

.scn-card__foot strong {
  font-size: 12.5px;
  font-weight: 600;
  color: var(--brand-ink);
  text-align: right;
}

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

/* --------------------------------------------------------------------------
   08. 90 天计划
   -------------------------------------------------------------------------- */

.plan90 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: clamp(38px, 5vw, 56px);
}

.d30 {
  position: relative;
  padding: 30px 28px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: #fff;
  overflow: hidden;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease),
    border-color 0.35s var(--ease);
}

.d30:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(75, 69, 255, 0.26);
}

.d30__day {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  color: var(--brand-ink);
  text-transform: uppercase;
}

.d30__day i {
  display: block;
  width: 26px;
  height: 1px;
  background: var(--brand);
  opacity: 0.4;
}

.d30 h3 {
  margin-top: 18px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.d30 > p {
  margin-top: 8px;
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--muted);
}

.d30 ul {
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.d30 li {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  font-size: 12.5px;
  color: var(--ink-2);
}

.d30 li + li {
  margin-top: 10px;
}

.d30 li .icon {
  width: 14px;
  height: 14px;
  margin-top: 4px;
  color: var(--brand);
  flex: none;
}

.d30__bar {
  position: absolute;
  left: 0;
  bottom: 0;
  height: 3px;
  width: 100%;
  background: var(--bg-tint);
}

.d30__bar i {
  display: block;
  height: 100%;
  background: var(--grad);
}

.d30:nth-child(1) .d30__bar i {
  width: 33.33%;
}
.d30:nth-child(2) .d30__bar i {
  width: 66.66%;
}
.d30:nth-child(3) .d30__bar i {
  width: 100%;
}

.plan90__after {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  margin-top: 16px;
  padding: 20px 26px;
  border: 1px dashed var(--line-strong);
  border-radius: var(--r-md);
  background: rgba(255, 255, 255, 0.6);
}

.plan90__after p {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13.5px;
  color: var(--ink-2);
}

.plan90__after .icon {
  width: 17px;
  height: 17px;
  color: var(--brand);
}

@media (max-width: 900px) {
  .plan90 {
    grid-template-columns: 1fr;
  }
}

/* --------------------------------------------------------------------------
   09. 为什么是星媒
   -------------------------------------------------------------------------- */

.why-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  margin-top: clamp(38px, 5vw, 56px);
}

.why-card {
  position: relative;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: #fff;
  overflow: hidden;
  transition: border-color 0.35s var(--ease), box-shadow 0.35s var(--ease),
    transform 0.35s var(--ease);
}

.why-card:hover {
  transform: translateY(-3px);
  border-color: rgba(75, 69, 255, 0.26);
  box-shadow: var(--shadow-md);
}

.why-card__num {
  position: absolute;
  top: 26px;
  right: 30px;
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted-2);
}

.why-card__icon {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 13px;
  background: var(--brand-soft);
  color: var(--brand);
}

.why-card h3 {
  margin-top: 24px;
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.025em;
}

.why-card p {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 480px;
}

.why-card__line {
  display: block;
  margin-top: 22px;
  padding-top: 16px;
  border-top: 1px dashed var(--line);
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--brand-ink);
}

@media (max-width: 760px) {
  .why-grid {
    grid-template-columns: 1fr;
  }
}

/* --------------------------------------------------------------------------
   10. 合作方式
   -------------------------------------------------------------------------- */

.plans {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: clamp(38px, 5vw, 56px);
  align-items: stretch;
}

.plan {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 32px 28px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: #fff;
  overflow: hidden;
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease),
    border-color 0.35s var(--ease);
}

.plan:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(75, 69, 255, 0.25);
}

.plan--feature {
  background: linear-gradient(155deg, #443dff 0%, #5548ff 48%, #6e58ff 100%);
  border-color: transparent;
  color: #fff;
  box-shadow: 0 40px 90px -46px rgba(75, 69, 255, 0.6);
}

.plan--feature::before {
  content: "";
  position: absolute;
  top: -120px;
  right: -100px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.28), transparent 66%);
  filter: blur(12px);
}

.plan--feature > * {
  position: relative;
  z-index: 1;
}

.plan__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  align-self: flex-start;
  padding: 5px 10px;
  border-radius: var(--r-full);
  background: var(--brand-soft);
  color: var(--brand-ink);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.04em;
}

.plan--feature .plan__badge {
  background: rgba(255, 255, 255, 0.18);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.28);
}

.plan__kicker {
  margin-top: 20px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--muted-2);
}

.plan--feature .plan__kicker {
  color: rgba(255, 255, 255, 0.78);
}

.plan h3 {
  margin-top: 8px;
  font-size: 23px;
  font-weight: 700;
  letter-spacing: -0.03em;
}

.plan > p {
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--muted);
}

.plan--feature > p {
  color: rgba(255, 255, 255, 0.9);
}

.plan__price {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-top: 22px;
  padding-bottom: 22px;
  border-bottom: 1px solid var(--line);
}

.plan--feature .plan__price {
  border-color: rgba(255, 255, 255, 0.24);
}

.plan__price strong {
  font-size: 30px;
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1;
}

.plan__price span {
  font-size: 12px;
  color: var(--muted-2);
}

.plan--feature .plan__price span {
  color: rgba(255, 255, 255, 0.82);
}

.plan ul {
  margin-top: 22px;
}

.plan li {
  display: flex;
  align-items: flex-start;
  gap: 9px;
  font-size: 13px;
  color: var(--ink-2);
}

.plan li + li {
  margin-top: 11px;
}

.plan li .icon {
  width: 15px;
  height: 15px;
  margin-top: 3px;
  color: var(--brand);
  flex: none;
}

.plan--feature li {
  color: rgba(255, 255, 255, 0.94);
}

.plan--feature li .icon {
  color: #fff;
}

.plan .btn {
  margin-top: 28px;
  width: 100%;
}

.plan--feature .btn {
  background: #fff;
  color: var(--ink);
}

.plan--feature .btn:hover {
  background: var(--ink);
  color: #fff;
}

.plans__note {
  margin-top: 18px;
  text-align: center;
  font-size: 12px;
  color: var(--muted-2);
}

@media (max-width: 900px) {
  .plans {
    grid-template-columns: 1fr;
    max-width: 520px;
    margin-inline: auto;
  }
}

/* --------------------------------------------------------------------------
   11. FAQ
   -------------------------------------------------------------------------- */

.faq {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: clamp(32px, 5vw, 80px);
  align-items: start;
}

.faq__intro {
  position: sticky;
  top: calc(var(--nav-h) + 40px);
}

.faq__intro h2 {
  margin-top: 18px;
  font-size: clamp(30px, 3.4vw, 46px);
  line-height: 1.14;
  letter-spacing: -0.04em;
  font-weight: 800;
}

.faq__intro p {
  margin-top: 18px;
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--muted);
  max-width: 340px;
}

.faq__contact {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 26px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  background: var(--bg-soft);
  max-width: 320px;
}

.faq__contact .icon {
  width: 18px;
  height: 18px;
  color: var(--brand);
  flex: none;
}

.faq__contact div {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.5;
}

.faq__contact b {
  display: block;
  color: var(--ink);
  font-size: 13px;
}

.faq-list {
  border-top: 1px solid var(--line);
}

.faq-item {
  border-bottom: 1px solid var(--line);
}

.faq-q {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
  padding: 22px 2px;
  text-align: left;
  font-size: 16px;
  font-weight: 600;
  letter-spacing: -0.015em;
  color: var(--ink);
  transition: color 0.2s var(--ease);
}

.faq-q:hover {
  color: var(--brand);
}

.faq-q__icon {
  position: relative;
  flex: none;
  width: 26px;
  height: 26px;
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease),
    transform 0.3s var(--ease);
}

.faq-q__icon::before,
.faq-q__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 9px;
  height: 1.4px;
  background: var(--ink-2);
  transform: translate(-50%, -50%);
  transition: transform 0.3s var(--ease), background 0.3s var(--ease);
}

.faq-q__icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
}

.faq-item.is-open .faq-q__icon {
  background: var(--ink);
  border-color: var(--ink);
  transform: rotate(180deg);
}

.faq-item.is-open .faq-q__icon::before,
.faq-item.is-open .faq-q__icon::after {
  background: #fff;
}

.faq-item.is-open .faq-q__icon::after {
  transform: translate(-50%, -50%) rotate(0deg);
}

.faq-a {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows 0.35s var(--ease);
}

.faq-a > div {
  overflow: hidden;
  visibility: hidden;
  transition: visibility 0s linear 0.35s;
}

.faq-a p {
  padding: 0 40px 24px 2px;
  font-size: 14px;
  line-height: 1.9;
  color: var(--muted);
}

.faq-item.is-open .faq-a {
  grid-template-rows: 1fr;
}

.faq-item.is-open .faq-a > div {
  visibility: visible;
  transition-delay: 0s;
}

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

  .faq__intro {
    position: static;
  }
}

/* --------------------------------------------------------------------------
   业务版图：四类 AI 能力
   -------------------------------------------------------------------------- */

.biz-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: clamp(38px, 5vw, 54px);
}

.biz-card {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  background: #fff;
  overflow: hidden;
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease),
    box-shadow 0.35s var(--ease);
}

.biz-card--tint {
  background: var(--grad-soft);
  border-color: rgba(75, 69, 255, 0.16);
}

.biz-card:hover {
  transform: translateY(-4px);
  border-color: rgba(75, 69, 255, 0.32);
  box-shadow: var(--shadow-md);
}

.biz-card__top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 14px;
}

.biz-card__icon {
  display: grid;
  place-items: center;
  width: 46px;
  height: 46px;
  border-radius: 13px;
  background: var(--brand-soft);
  color: var(--brand);
  transition: background 0.3s var(--ease), color 0.3s var(--ease);
}

.biz-card:hover .biz-card__icon {
  background: var(--grad);
  color: #fff;
}

.biz-card__num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted-2);
}

.biz-card__kicker {
  margin-top: 24px;
  font-family: var(--font-mono);
  font-size: 9.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--brand-ink);
}

.biz-card h3 {
  margin-top: 7px;
  font-size: clamp(22px, 2vw, 27px);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.25;
}

.biz-card > p {
  margin-top: 10px;
  max-width: 520px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--muted);
}

.biz-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 9px 16px;
  margin-top: 20px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
}

.biz-list a {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 12.5px;
  color: var(--ink-2);
  transition: color 0.2s var(--ease);
}

.biz-list a::before {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--brand);
  opacity: 0.75;
  flex: none;
}

.biz-list a:hover {
  color: var(--brand-ink);
}

.biz-card .link-arrow {
  margin-top: auto;
  padding-top: 24px;
}

.biz-note {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  margin-top: 16px;
  padding: 22px 26px;
  border: 1px solid var(--line);
  border-radius: var(--r-md);
  background: #fff;
}

.biz-note strong {
  display: block;
  font-size: 14.5px;
  letter-spacing: -0.01em;
}

.biz-note span {
  display: block;
  margin-top: 4px;
  font-size: 12px;
  color: var(--muted);
}

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

@media (max-width: 560px) {
  .biz-card {
    padding: 24px 22px;
  }

  .biz-list {
    grid-template-columns: 1fr;
  }

  .biz-note {
    align-items: flex-start;
    flex-direction: column;
    gap: 16px;
  }

  .biz-note .btn {
    width: 100%;
  }
}