html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + 18px);
}

body {
  overflow-x: hidden;
  color: var(--color-text);
  background: var(--color-bg);
  font-family: var(--font-sans);
  font-size: var(--font-size-base);
  line-height: 1.75;
}

body.menu-open {
  overflow: hidden;
}

::selection {
  color: var(--color-white);
  background: var(--color-primary);
}

.container {
  width: min(
    calc(100% - 48px),
    var(--container-width)
  );
  margin-inline: auto;
}

.section {
  position: relative;
  padding-block: var(--space-section);
}

.skip-link {
  position: fixed;
  z-index: 1200;
  top: 12px;
  left: 16px;
  padding: 10px 16px;
  color: var(--color-white);
  background: var(--color-primary);
  border-radius: var(--radius-sm);
  transform: translateY(-140%);
  transition: transform var(--duration-fast) var(--ease-standard);
}

.skip-link:focus {
  transform: translateY(0);
}

.section-heading {
  margin-bottom: clamp(2.5rem, 5vw, 4.5rem);
}

.section-heading h2,
.contact-heading h2,
.advantages-intro h2,
.about-copy h2 {
  max-width: 760px;
  color: var(--color-heading);
  font-family: var(--font-display);
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  line-height: 1.28;
  letter-spacing: -0.035em;
}

.section-heading > p:not(.section-kicker),
.contact-heading > p:not(.section-kicker),
.advantages-intro > p:not(.section-kicker) {
  max-width: var(--content-width);
  margin-top: var(--space-5);
  color: var(--color-muted);
  line-height: 1.85;
}

.section-kicker {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  line-height: 1.4;
  letter-spacing: 0.11em;
}

.section-kicker::before {
  width: 24px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-pill);
  content: "";
}

.section-heading-center {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.section-heading-center .section-kicker {
  justify-content: center;
}

.section-heading-split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(300px, 0.65fr);
  gap: clamp(2rem, 6vw, 6rem);
  align-items: end;
}

.section-heading-split > p {
  position: relative;
  margin-top: 0 !important;
  padding-left: var(--space-6);
  border-left: 1px solid var(--color-border);
}

.button {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 11px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  line-height: 1.4;
  cursor: pointer;
  transition:
    color var(--duration-fast) var(--ease-standard),
    background-color var(--duration-fast) var(--ease-standard),
    border-color var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard),
    transform var(--duration-fast) var(--ease-standard);
}

.button svg,
.text-link svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
  transition: transform var(--duration-fast) var(--ease-standard);
}

.button:hover svg,
.text-link:hover svg {
  transform: translateX(3px);
}

.button-primary {
  color: var(--color-white);
  background: linear-gradient(135deg, var(--color-primary) 0%, #3177fa 58%, var(--color-secondary) 130%);
  box-shadow: 0 8px 20px rgba(36, 107, 253, 0.18);
}

.button-primary:hover {
  box-shadow: var(--shadow-blue);
  transform: translateY(-2px);
}

.button-secondary {
  color: var(--color-heading);
  background: rgba(255, 255, 255, 0.84);
  border-color: var(--color-border);
  box-shadow: var(--shadow-xs);
}

.button-secondary:hover {
  color: var(--color-primary);
  border-color: rgba(36, 107, 253, 0.35);
  transform: translateY(-2px);
}

.button-large {
  min-height: 52px;
  padding-inline: 26px;
  border-radius: 12px;
  font-size: var(--font-size-base);
}

/* 顶部导航 */
.site-header {
  position: fixed;
  z-index: 1000;
  top: 0;
  right: 0;
  left: 0;
  height: var(--nav-height);
  background: rgba(255, 255, 255, 0.76);
  border-bottom: 1px solid rgba(228, 231, 236, 0.58);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  transition:
    background-color var(--duration-normal) var(--ease-standard),
    box-shadow var(--duration-normal) var(--ease-standard),
    border-color var(--duration-normal) var(--ease-standard);
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.97);
  border-color: rgba(228, 231, 236, 0.9);
  box-shadow: 0 8px 28px rgba(16, 24, 40, 0.07);
}

.nav-shell {
  display: flex;
  height: 100%;
  align-items: center;
  justify-content: space-between;
}

.brand-link {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
}

.brand-link img {
  width: 201px;
  height: auto;
}

.site-nav,
.menu-panel {
  display: flex;
  align-items: center;
}

.menu-panel {
  gap: clamp(1.25rem, 2.2vw, 2.25rem);
}

.nav-list {
  display: flex;
  align-items: center;
  gap: clamp(0.4rem, 1.1vw, 1rem);
}

.nav-link {
  position: relative;
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  padding-inline: 10px;
  color: #344054;
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  white-space: nowrap;
  transition: color var(--duration-fast) var(--ease-standard);
}

.nav-link::after {
  position: absolute;
  right: 10px;
  bottom: 2px;
  left: 10px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  border-radius: var(--radius-pill);
  content: "";
  opacity: 0;
  transform: scaleX(0.25);
  transition:
    opacity var(--duration-fast) var(--ease-standard),
    transform var(--duration-fast) var(--ease-standard);
}

.nav-link:hover,
.nav-link.active {
  color: var(--color-primary);
}

.nav-link.active::after {
  opacity: 1;
  transform: scaleX(1);
}

.nav-cta {
  padding-inline: 18px;
}

.menu-toggle {
  display: none;
  width: 46px;
  height: 46px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 12px;
  cursor: pointer;
}

.menu-toggle span {
  width: 20px;
  height: 2px;
  background: var(--color-navy);
  border-radius: var(--radius-pill);
  transform-origin: center;
  transition:
    transform var(--duration-normal) var(--ease-standard),
    opacity var(--duration-fast) var(--ease-standard);
}

.menu-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.menu-backdrop {
  position: fixed;
  z-index: 990;
  inset: var(--nav-height) 0 0;
  display: none;
  background: rgba(11, 31, 58, 0.35);
  opacity: 0;
  -webkit-backdrop-filter: blur(2px);
  backdrop-filter: blur(2px);
  transition: opacity var(--duration-normal) var(--ease-standard);
}

/* 首屏 */
.hero {
  position: relative;
  z-index: 1;
  overflow: hidden;
  padding-top: calc(var(--nav-height) + clamp(4rem, 8vw, 7rem));
  padding-bottom: clamp(3rem, 6vw, 5rem);
  background:
    linear-gradient(180deg, rgba(243, 247, 255, 0.72) 0%, rgba(255, 255, 255, 0.2) 68%, #fff 100%);
}

.hero::before {
  position: absolute;
  z-index: -1;
  top: 0;
  right: 50%;
  width: 1px;
  height: 100%;
  background: linear-gradient(180deg, transparent, rgba(36, 107, 253, 0.08), transparent);
  content: "";
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(470px, 0.88fr);
  gap: clamp(2rem, 4vw, 4rem);
  align-items: center;
}

.hero-copy {
  position: relative;
  z-index: 2;
  animation: heroCopyIn 900ms var(--ease-standard) both;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin-bottom: var(--space-6);
  padding: 7px 13px 7px 9px;
  color: var(--color-navy);
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(36, 107, 253, 0.16);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-xs);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
  line-height: 1.4;
}

.eyebrow-dot {
  position: relative;
  width: 21px;
  height: 21px;
  background: var(--color-primary-soft);
  border-radius: 50%;
}

.hero h1 {
  max-width: 680px;
  color: var(--color-heading);
  font-family: var(--font-display);
  font-size: var(--font-size-hero);
  font-weight: var(--font-weight-bold);
  line-height: 1.16;
  letter-spacing: -0.05em;
}

.hero h1 > .hero-primary-line {
  display: block;
  white-space: nowrap;
}

.hero h1 > .hero-secondary-line {
  display: block;
  margin-top: 0.18em;
  font-size: 0.75em;
  line-height: 1.3;
  letter-spacing: -0.045em;
  white-space: nowrap;
}

.hero-description {
  max-width: 650px;
  margin-top: var(--space-6);
  color: var(--color-text);
  font-size: clamp(1rem, 1.35vw, 1.1rem);
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-8);
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: var(--space-8);
}

.hero-tags li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--color-muted);
  font-size: var(--font-size-sm);
}

/* 核心业务 */
.business-section {
  background: var(--color-white);
}

.business-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid var(--color-border);
  border-left: 1px solid var(--color-border);
}

.feature-card {
  position: relative;
  min-height: 400px;
  overflow: hidden;
  padding: clamp(1.5rem, 2.5vw, 2rem);
  background: var(--color-white);
  border-right: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  transition:
    transform var(--duration-normal) var(--ease-standard),
    box-shadow var(--duration-normal) var(--ease-standard),
    border-color var(--duration-normal) var(--ease-standard);
}

.feature-card::before {
  position: absolute;
  top: 0;
  right: 0;
  left: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-secondary));
  content: "";
  opacity: 0;
  transform: scaleX(0.3);
  transform-origin: left;
  transition:
    opacity var(--duration-normal) var(--ease-standard),
    transform var(--duration-normal) var(--ease-standard);
}

.feature-card:hover {
  z-index: 1;
  border-color: transparent;
  box-shadow: var(--shadow-md);
  transform: translateY(-8px);
}

.feature-card:hover::before {
  opacity: 1;
  transform: scaleX(1);
}

.feature-card-accent {
  background: linear-gradient(145deg, #f7faff 0%, #f4fbfa 100%);
}

.card-index {
  position: absolute;
  top: 20px;
  right: 22px;
  color: #d0d5dd;
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
}

.icon-box,
.product-icon,
.value-icon {
  display: grid;
  width: 66px;
  height: 66px;
  place-items: center;
  background: var(--color-primary-soft);
  border: 1px solid rgba(36, 107, 253, 0.12);
  border-radius: 18px;
}

.icon-box-green,
.product-icon-green,
.value-icon-green {
  background: var(--color-secondary-soft);
  border-color: rgba(22, 184, 166, 0.14);
}

.icon-box img,
.product-icon img,
.value-icon img {
  width: 42px;
  height: 42px;
}

.feature-card h3 {
  margin-top: var(--space-8);
  color: var(--color-heading);
  font-size: var(--font-size-lg);
  line-height: 1.4;
}

.feature-card > p {
  margin-top: var(--space-4);
  color: var(--color-muted);
  font-size: var(--font-size-sm);
  line-height: 1.8;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: var(--space-6);
}

.tag-list li {
  padding: 5px 9px;
  color: #46536a;
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border-soft);
  border-radius: 7px;
  font-size: var(--font-size-xs);
  line-height: 1.4;
}

/* 产品矩阵 */
.products-section {
  z-index: 1;
  overflow: hidden;
  background: var(--color-bg-soft);
}

.core-products {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-6);
}

.product-card {
  position: relative;
  overflow: hidden;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition:
    transform var(--duration-normal) var(--ease-standard),
    box-shadow var(--duration-normal) var(--ease-standard),
    border-color var(--duration-normal) var(--ease-standard);
}

.product-card:hover {
  border-color: rgba(36, 107, 253, 0.25);
  box-shadow: var(--shadow-md);
  transform: translateY(-6px);
}

.product-card-core {
  display: grid;
  min-height: 590px;
  grid-template-rows: auto 230px;
}

.product-card-content {
  position: relative;
  z-index: 1;
  padding: clamp(1.75rem, 3vw, 2.5rem);
}

.product-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.product-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  border: 1px solid rgba(36, 107, 253, 0.12);
  border-radius: var(--radius-pill);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  line-height: 1.3;
}

.product-badge::before {
  width: 6px;
  height: 6px;
  margin-right: 6px;
  background: currentColor;
  border-radius: 50%;
  content: "";
}

.product-badge-green {
  color: var(--color-secondary-dark);
  background: var(--color-secondary-soft);
  border-color: rgba(22, 184, 166, 0.15);
}

.product-badge-ai {
  color: var(--color-navy);
  background: #eef2f7;
  border-color: #e1e7ef;
}

.product-number {
  color: var(--color-subtle);
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  letter-spacing: 0.08em;
}

.product-title-row {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.product-icon {
  width: 62px;
  height: 62px;
  flex: 0 0 auto;
  border-radius: 17px;
}

.product-icon img {
  width: 40px;
  height: 40px;
}

.product-title-row h3 {
  color: var(--color-heading);
  font-size: var(--font-size-xl);
  line-height: 1.35;
}

.product-position {
  margin-top: 3px;
  color: var(--color-muted);
  font-size: var(--font-size-sm);
  line-height: 1.5;
}

.product-description {
  margin-top: var(--space-6);
  color: var(--color-text);
  font-size: var(--font-size-sm);
  line-height: 1.85;
}

.capability-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 16px;
  margin-top: var(--space-6);
}

.capability-list li {
  position: relative;
  padding-left: 18px;
  color: #344054;
  font-size: var(--font-size-sm);
  line-height: 1.55;
}

.capability-list li::before {
  position: absolute;
  top: 0.5em;
  left: 1px;
  width: 7px;
  height: 7px;
  background: var(--color-secondary);
  border-radius: 2px;
  content: "";
  transform: rotate(45deg);
}

.ai-products {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--space-6);
  margin-top: var(--space-6);
}

.product-card-ai {
  min-height: 515px;
  padding: clamp(1.5rem, 2.5vw, 2rem);
}

.product-card-ai .product-title-row {
  align-items: flex-start;
}

.product-card-ai .product-title-row h3 {
  font-size: var(--font-size-lg);
}

.capability-list-compact {
  grid-template-columns: 1fr;
  gap: 8px;
}

.capability-list-compact li {
  font-size: 13px;
}

/* 运营链路 */
.process-section {
  overflow: hidden;
  background: var(--color-white);
}

.process-list {
  position: relative;
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: var(--space-4);
  padding-top: var(--space-4);
}

.process-list::before {
  position: absolute;
  z-index: 0;
  top: 74px;
  right: calc(100% / 12);
  left: calc(100% / 12);
  height: 3px;
  background: linear-gradient(90deg, var(--color-primary), #7da5f9 48%, var(--color-secondary));
  border-radius: var(--radius-pill);
  content: "";
}

.process-list::after {
  position: absolute;
  z-index: 0;
  top: 70px;
  left: calc(100% / 12);
  width: 11px;
  height: 11px;
  background: var(--color-primary);
  border: 3px solid #dbe7ff;
  border-radius: 50%;
  box-sizing: content-box;
  content: "";
  animation: processDot 12s linear infinite;
}

.process-item {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  flex-direction: column;
  text-align: center;
}

.process-number {
  margin-bottom: 7px;
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.08em;
}

.process-content {
  margin-top: var(--space-5);
}

.process-content h3 {
  color: var(--color-heading);
  font-size: var(--font-size-base);
  line-height: 1.5;
}

.process-content p {
  margin-top: var(--space-2);
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.75;
}

/* AI 能力 */
.ai-section {
  z-index: 1;
  overflow: hidden;
  color: #c8d7ed;
  background:
    radial-gradient(circle at 85% 15%, rgba(36, 107, 253, 0.2), transparent 28%),
    radial-gradient(circle at 12% 90%, rgba(22, 184, 166, 0.11), transparent 25%),
    linear-gradient(145deg, #0b1f3a 0%, #102c50 65%, #0d3651 100%);
}

.ai-section::before {
  position: absolute;
  z-index: -1;
  inset: 0;
  background:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 42px 42px;
  content: "";
  mask-image: linear-gradient(90deg, transparent, #000, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000, transparent);
}

.section-heading-light {
  max-width: 760px;
}

.section-heading-light h2 {
  color: var(--color-white);
}

.section-heading-light .section-kicker {
  color: #68d8cb;
}

.section-heading-light > p:not(.section-kicker) {
  color: #b8c8de;
}

.ai-layout {
  display: grid;
  grid-template-columns: minmax(300px, 0.82fr) minmax(550px, 1.18fr);
  gap: clamp(2rem, 6vw, 5.5rem);
  align-items: center;
}

.ai-capabilities {
  display: grid;
  gap: 1px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: var(--radius-md);
}

.ai-capability {
  display: grid;
  grid-template-columns: 42px 1fr;
  gap: var(--space-4);
  padding: clamp(1.25rem, 2vw, 1.6rem);
  background: rgba(9, 31, 57, 0.74);
  transition: background-color var(--duration-fast) var(--ease-standard);
}

.ai-capability:hover {
  background: rgba(20, 58, 98, 0.78);
}

.ai-capability > span {
  color: #66d8cc;
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
}

.ai-capability h3 {
  color: var(--color-white);
  font-size: var(--font-size-md);
  line-height: 1.5;
}

.ai-capability p {
  margin-top: 6px;
  color: #aebfd5;
  font-size: var(--font-size-sm);
  line-height: 1.75;
}

.ai-demo {
  position: relative;
  padding: 14px;
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid rgba(255, 255, 255, 0.45);
  border-radius: 26px;
  box-shadow: 0 30px 80px rgba(0, 11, 27, 0.3);
}

.ai-demo-topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 10px 18px;
  border-bottom: 1px solid var(--color-border-soft);
}

.ai-demo-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.ai-demo-mark {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  background: var(--color-navy);
  border-radius: 11px;
}

.ai-demo-mark img {
  width: 30px;
  height: 30px;
}

.ai-demo-brand strong {
  display: block;
  color: var(--color-heading);
  font-size: 13px;
  line-height: 1.4;
}

.ai-demo-brand small {
  display: flex;
  align-items: center;
  gap: 5px;
  margin-top: 2px;
  color: var(--color-muted);
  font-size: 9px;
}

.ai-demo-brand small i {
  width: 6px;
  height: 6px;
  background: var(--color-secondary);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(22, 184, 166, 0.13);
}

.ai-demo-status {
  padding: 5px 9px;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  border-radius: var(--radius-pill);
  font-size: 10px;
  font-weight: var(--font-weight-semibold);
}

.ai-summary-card {
  margin-top: 12px;
  padding: 15px;
  background: linear-gradient(135deg, #f3f7ff, #f7fbff);
  border: 1px solid #dfe8f7;
  border-radius: var(--radius-md);
}

.summary-head {
  display: flex;
  align-items: center;
}

.avatar-placeholder {
  position: relative;
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  background: linear-gradient(135deg, #dfe9ff, #d7f4f0);
  border-radius: 12px;
}

.avatar-placeholder span::before {
  display: block;
  width: 10px;
  height: 10px;
  margin: 0 auto 2px;
  background: var(--color-primary);
  border-radius: 50%;
  content: "";
}

.avatar-placeholder span::after {
  display: block;
  width: 18px;
  height: 9px;
  background: var(--color-primary);
  border-radius: 10px 10px 4px 4px;
  content: "";
}

.summary-head > div:nth-child(2) {
  margin-left: 10px;
}

.summary-head small,
.ai-data-card small,
.ai-suggestion-card small {
  display: block;
  color: var(--color-muted);
  font-size: 9px;
  line-height: 1.4;
}

.summary-head strong {
  display: block;
  margin-top: 2px;
  color: var(--color-heading);
  font-size: 12px;
  line-height: 1.4;
}

.summary-tag {
  margin-left: auto;
  padding: 4px 7px;
  color: var(--color-secondary-dark);
  background: var(--color-secondary-soft);
  border-radius: 6px;
  font-size: 9px;
  font-weight: var(--font-weight-semibold);
}

.ai-summary-card > p {
  margin-top: 12px;
  color: var(--color-text);
  font-size: 11px;
  line-height: 1.7;
}

.summary-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.summary-actions span {
  padding: 4px 7px;
  color: #475467;
  background: var(--color-white);
  border: 1px solid #e5ebf4;
  border-radius: 6px;
  font-size: 9px;
}

.ai-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-top: 10px;
  padding: 11px 12px;
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 12px;
}

.question-label {
  display: flex;
  min-width: 0;
  align-items: center;
  gap: 8px;
  color: var(--color-heading);
  font-size: 11px;
  font-weight: var(--font-weight-medium);
}

.question-label > span {
  display: grid;
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
  place-items: center;
  color: var(--color-white);
  background: var(--color-primary);
  border-radius: 7px;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: var(--font-weight-bold);
}

.typing-indicator {
  display: flex;
  flex: 0 0 auto;
  gap: 3px;
}

.typing-indicator span {
  width: 4px;
  height: 4px;
  background: var(--color-secondary);
  border-radius: 50%;
  animation: typing 1.4s ease-in-out infinite;
}

.typing-indicator span:nth-child(2) {
  animation-delay: 140ms;
}

.typing-indicator span:nth-child(3) {
  animation-delay: 280ms;
}

.ai-insight-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 10px;
  margin-top: 10px;
}

.ai-data-card,
.ai-suggestion-card {
  min-height: 92px;
  padding: 12px;
  background: var(--color-white);
  border: 1px solid var(--color-border-soft);
  border-radius: 12px;
}

.ai-data-card strong {
  display: block;
  margin-top: 2px;
  color: var(--color-heading);
  font-size: 11px;
}

.spark-chart {
  height: 44px;
  margin-top: 3px;
}

.spark-chart svg {
  width: 100%;
  height: 100%;
  overflow: visible;
  fill: none;
  stroke: var(--color-primary);
  stroke-width: 2;
  stroke-linecap: round;
}

.spark-chart circle {
  fill: var(--color-secondary);
  stroke: var(--color-white);
}

.ai-suggestion-card {
  background: linear-gradient(145deg, #f3fbfa, #f7fcfb);
}

.ai-suggestion-card p {
  margin-top: 5px;
  color: var(--color-heading);
  font-size: 10px;
  line-height: 1.55;
}

.ai-suggestion-card span {
  display: block;
  margin-top: 7px;
  color: var(--color-secondary-dark);
  font-size: 9px;
  font-weight: var(--font-weight-semibold);
}

.question-examples {
  margin-top: 10px;
  padding: 12px;
  background: #f9fafb;
  border: 1px solid var(--color-border-soft);
  border-radius: 12px;
}

.question-examples p {
  color: var(--color-muted);
  font-size: 9px;
}

.question-examples button {
  display: block;
  width: 100%;
  margin-top: 5px;
  padding: 5px 7px;
  color: #475467;
  background: transparent;
  border: 0;
  border-radius: 5px;
  font-size: 9px;
  line-height: 1.4;
  text-align: left;
  cursor: default;
}

.question-examples button::before {
  margin-right: 7px;
  color: var(--color-primary);
  content: "→";
}

/* 业务价值 */
.value-section {
  background: var(--color-white);
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--space-5);
}

.value-card {
  position: relative;
  min-height: 340px;
  grid-column: span 4;
  overflow: hidden;
  padding: clamp(1.5rem, 2.8vw, 2.25rem);
  background: var(--color-bg-soft);
  border: 1px solid var(--color-border-soft);
  border-radius: var(--radius-lg);
  transition:
    border-color var(--duration-normal) var(--ease-standard),
    transform var(--duration-normal) var(--ease-standard);
}

.value-card:hover {
  border-color: rgba(36, 107, 253, 0.26);
  transform: translateY(-5px);
}

.value-card-large {
  grid-column: span 8;
  background:
    radial-gradient(circle at 85% 30%, rgba(36, 107, 253, 0.11), transparent 30%),
    linear-gradient(135deg, #f3f7ff, #f8faff);
}

.value-card-wide {
  display: grid;
  min-height: 230px;
  grid-column: 1 / -1;
  grid-template-columns: auto minmax(0, 1fr) minmax(300px, 0.7fr);
  align-items: center;
  gap: var(--space-6);
  background: linear-gradient(135deg, #f6fbfa, #f8fafc);
}

.value-number {
  position: absolute;
  top: 20px;
  right: 24px;
  color: #cdd5df;
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
}

.value-icon {
  width: 62px;
  height: 62px;
  border-radius: 17px;
}

.value-icon img {
  width: 40px;
  height: 40px;
}

.value-card h3 {
  max-width: 420px;
  margin-top: var(--space-6);
  color: var(--color-heading);
  font-size: var(--font-size-lg);
  line-height: 1.45;
}

.value-card p {
  max-width: 620px;
  margin-top: var(--space-3);
  color: var(--color-muted);
  font-size: var(--font-size-sm);
  line-height: 1.85;
}

.value-card-wide h3 {
  margin-top: 0;
}

/* 适用场景 */
.scenarios-section {
  background: var(--color-bg-blue);
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--space-4);
}

.scenario-card {
  min-height: 240px;
  padding: clamp(1.5rem, 2.4vw, 2rem);
  background: rgba(255, 255, 255, 0.86);
  border: 1px solid rgba(222, 229, 241, 0.9);
  border-radius: var(--radius-md);
  transition:
    background-color var(--duration-normal) var(--ease-standard),
    border-color var(--duration-normal) var(--ease-standard),
    box-shadow var(--duration-normal) var(--ease-standard),
    transform var(--duration-normal) var(--ease-standard);
}

.scenario-card:hover {
  background: var(--color-white);
  border-color: rgba(36, 107, 253, 0.22);
  box-shadow: var(--shadow-sm);
  transform: translateY(-5px);
}

.scenario-card img {
  width: 46px;
  height: 46px;
}

.scenario-card h3 {
  margin-top: var(--space-5);
  color: var(--color-heading);
  font-size: var(--font-size-md);
  line-height: 1.45;
}

.scenario-card p {
  margin-top: var(--space-3);
  color: var(--color-muted);
  font-size: var(--font-size-sm);
  line-height: 1.75;
}

/* 服务优势 */
.advantages-section {
  background: var(--color-white);
}

.advantages-section .container {
  display: grid;
  grid-template-columns: minmax(300px, 0.8fr) minmax(520px, 1.2fr);
  gap: clamp(3rem, 8vw, 7.5rem);
  align-items: start;
}

.advantages-intro {
  position: sticky;
  top: calc(var(--nav-height) + 48px);
}

.advantages-intro h2 {
  margin-top: 0;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: var(--space-8);
  color: var(--color-primary);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-semibold);
}

.advantages-list {
  border-top: 1px solid var(--color-border);
}

.advantage-item {
  display: grid;
  min-height: 145px;
  grid-template-columns: 38px 58px minmax(0, 1fr);
  gap: var(--space-5);
  align-items: center;
  padding-block: var(--space-6);
  border-bottom: 1px solid var(--color-border);
  transition: padding-left var(--duration-normal) var(--ease-standard);
}

.advantage-item:hover {
  padding-left: 10px;
}

.advantage-index {
  color: var(--color-primary);
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-bold);
}

.advantage-item img {
  width: 44px;
  height: 44px;
}

.advantage-item h3 {
  color: var(--color-heading);
  font-size: var(--font-size-md);
  line-height: 1.45;
}

.advantage-item p {
  margin-top: 6px;
  color: var(--color-muted);
  font-size: var(--font-size-sm);
  line-height: 1.75;
}

/* 关于我们 */
.about-section {
  overflow: hidden;
  background:
    radial-gradient(circle at 100% 60%, rgba(22, 184, 166, 0.07), transparent 28%),
    var(--color-bg-soft);
}

.about-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(500px, 1.1fr);
  gap: clamp(2.5rem, 6vw, 5.5rem);
  align-items: center;
}

.about-description {
  margin-top: var(--space-6);
}

.about-description p {
  color: var(--color-text);
  line-height: 1.9;
}

.about-description p + p {
  margin-top: var(--space-4);
}

.about-principles {
  display: grid;
  gap: 0;
  margin-top: var(--space-8);
  border-top: 1px solid var(--color-border);
}

.about-principles > div {
  display: grid;
  grid-template-columns: 86px 1fr;
  gap: var(--space-4);
  align-items: center;
  padding-block: var(--space-4);
  border-bottom: 1px solid var(--color-border);
}

.about-principles dt span {
  display: inline-flex;
  min-width: 54px;
  justify-content: center;
  padding: 5px 8px;
  color: var(--color-primary);
  background: var(--color-primary-soft);
  border-radius: 6px;
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
}

.about-principles dd {
  color: var(--color-heading);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

.about-figure {
  margin-right: -1.5rem;
}

.about-figure img {
  width: 100%;
}

/* 联系我们 */
.contact-section {
  z-index: 1;
  overflow: hidden;
  background: var(--color-white);
}

.contact-pattern {
  position: absolute;
  z-index: -1;
  top: 0;
  right: 0;
  left: 0;
  height: 56%;
  background:
    radial-gradient(circle at 78% 8%, rgba(22, 184, 166, 0.08), transparent 28%),
    linear-gradient(180deg, var(--color-bg-blue), rgba(255, 255, 255, 0));
}

.contact-heading {
  max-width: 800px;
  margin-bottom: clamp(2.5rem, 5vw, 4rem);
}

.contact-layout {
  display: grid;
  grid-template-columns: minmax(320px, 0.74fr) minmax(540px, 1.26fr);
  gap: var(--space-6);
  align-items: stretch;
}

.contact-info {
  position: relative;
  overflow: hidden;
  padding: clamp(1.75rem, 3vw, 2.5rem);
  color: #c6d2e3;
  background:
    radial-gradient(circle at 105% 0%, rgba(36, 107, 253, 0.28), transparent 38%),
    linear-gradient(145deg, var(--color-navy), #12365f);
  border-radius: var(--radius-lg);
}

.contact-info-top {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: var(--space-4);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.contact-info-top img {
  width: 50px;
  height: 50px;
}

.contact-info-top small,
.form-panel-heading small {
  display: block;
  color: #7ea6dc;
  font-family: var(--font-mono);
  font-size: 10px;
  font-weight: var(--font-weight-bold);
  letter-spacing: 0.12em;
}

.contact-info-top h3 {
  margin-top: 3px;
  color: var(--color-white);
  font-size: var(--font-size-md);
  line-height: 1.5;
}

.contact-info-intro {
  position: relative;
  z-index: 1;
  margin-top: var(--space-6);
  color: #b9c8da;
  font-size: var(--font-size-sm);
  line-height: 1.8;
}

.contact-details {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 1px;
  margin-top: var(--space-6);
  overflow: hidden;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
}

.contact-details > div {
  display: grid;
  min-height: 62px;
  grid-template-columns: 92px minmax(0, 1fr);
  align-items: center;
  padding: 12px 16px;
  background: rgba(8, 29, 54, 0.54);
}

.contact-details dt {
  color: #8fa7c6;
  font-size: var(--font-size-xs);
}

.contact-details dd {
  color: var(--color-white);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
}

.contact-note {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: var(--space-6);
  color: #88a1c0;
  font-size: var(--font-size-xs);
}

.contact-note span {
  width: 7px;
  height: 7px;
  background: var(--color-secondary);
  border-radius: 50%;
  box-shadow: 0 0 0 4px rgba(22, 184, 166, 0.13);
}

.contact-form-panel {
  padding: clamp(1.75rem, 3vw, 2.5rem);
  background: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
}

.form-panel-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  padding-bottom: var(--space-6);
  border-bottom: 1px solid var(--color-border);
}

.form-panel-heading small {
  color: var(--color-primary);
}

.form-panel-heading h3 {
  margin-top: 4px;
  color: var(--color-heading);
  font-size: var(--font-size-xl);
  line-height: 1.4;
}

.form-panel-heading > span {
  color: var(--color-subtle);
  font-family: var(--font-mono);
  font-size: var(--font-size-xs);
}

.contact-form-panel form {
  margin-top: var(--space-6);
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--space-5);
}

.form-field {
  min-width: 0;
}

.form-field-full {
  grid-column: 1 / -1;
}

.form-field label {
  display: block;
  margin-bottom: 8px;
  color: var(--color-heading);
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  line-height: 1.5;
}

.form-field label span {
  color: var(--color-error);
}

.form-field input,
.form-field select,
.form-field textarea {
  width: 100%;
  min-height: 48px;
  padding: 11px 13px;
  color: var(--color-heading);
  background: var(--color-white);
  border: 1px solid #d0d5dd;
  border-radius: var(--radius-sm);
  outline: none;
  transition:
    border-color var(--duration-fast) var(--ease-standard),
    box-shadow var(--duration-fast) var(--ease-standard);
}

.form-field textarea {
  min-height: 126px;
}

.form-field input::placeholder,
.form-field textarea::placeholder {
  color: #98a2b3;
}

.form-field input:hover,
.form-field select:hover,
.form-field textarea:hover {
  border-color: #aeb8c7;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 4px rgba(36, 107, 253, 0.1);
}

.select-wrap {
  position: relative;
  display: block;
}

.select-wrap::after {
  position: absolute;
  top: 50%;
  right: 15px;
  width: 8px;
  height: 8px;
  border-right: 2px solid #667085;
  border-bottom: 2px solid #667085;
  content: "";
  pointer-events: none;
  transform: translateY(-70%) rotate(45deg);
}

.form-field select {
  padding-right: 38px;
  appearance: none;
  -webkit-appearance: none;
}

.field-error {
  min-height: 20px;
  margin-top: 5px;
  color: var(--color-error);
  font-size: var(--font-size-xs);
  line-height: 1.5;
}

.form-field.has-error input,
.form-field.has-error textarea {
  border-color: var(--color-error);
  background: #fffbfa;
}

.form-field.has-error input:focus,
.form-field.has-error textarea:focus {
  box-shadow: 0 0 0 4px rgba(217, 45, 32, 0.09);
}

.form-submit {
  margin-top: var(--space-1);
}

.form-privacy {
  display: inline-block;
  margin-left: var(--space-4);
  color: var(--color-subtle);
  font-size: var(--font-size-xs);
  line-height: 1.6;
  vertical-align: middle;
}

.form-success {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-top: var(--space-5);
  padding: 13px 15px;
  color: var(--color-success);
  background: #ecfdf8;
  border: 1px solid #a8e2d9;
  border-radius: var(--radius-sm);
  font-size: var(--font-size-sm);
  line-height: 1.65;
}

.form-success > span {
  display: grid;
  width: 22px;
  height: 22px;
  flex: 0 0 auto;
  place-items: center;
  background: rgba(22, 184, 166, 0.13);
  border-radius: 50%;
}

.form-success svg {
  width: 14px;
  height: 14px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.3;
  stroke-linecap: round;
  stroke-linejoin: round;
}

/* 页脚 */
.site-footer {
  color: #9eb0c8;
  background:
    radial-gradient(circle at 80% 10%, rgba(36, 107, 253, 0.18), transparent 25%),
    var(--color-navy);
}

.footer-main {
  display: grid;
  grid-template-columns: 1.35fr 0.6fr 0.6fr 1.05fr;
  gap: clamp(2rem, 5vw, 5rem);
  padding-block: clamp(3.5rem, 6vw, 5rem);
}

.footer-brand > a {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
}

.footer-brand > a img {
  width: 48px;
  height: 48px;
}

.footer-brand > a span {
  display: flex;
  flex-direction: column;
}

.footer-brand > a strong {
  color: var(--color-white);
  font-size: var(--font-size-lg);
  line-height: 1.3;
  letter-spacing: 0.08em;
}

.footer-brand > a small {
  margin-top: 3px;
  color: #91a8c6;
  font-family: var(--font-sans);
  font-size: 8px;
  font-weight: var(--font-weight-semibold);
  line-height: 1.4;
  letter-spacing: 0.18em;
}

.footer-brand > p {
  margin-top: var(--space-6);
  color: #c0ccdc;
  font-size: var(--font-size-sm);
}

.footer-company {
  display: block;
  margin-top: var(--space-3);
  color: #778da9;
  font-size: var(--font-size-xs);
}

.footer-nav h2,
.footer-cta h2 {
  color: var(--color-white);
  font-size: var(--font-size-base);
  line-height: 1.5;
}

.footer-nav ul {
  display: grid;
  gap: 9px;
  margin-top: var(--space-5);
}

.footer-nav a {
  display: inline-block;
  padding-block: 2px;
  color: #94a8c2;
  font-size: var(--font-size-sm);
  transition:
    color var(--duration-fast) var(--ease-standard),
    transform var(--duration-fast) var(--ease-standard);
}

.footer-nav a:hover {
  color: var(--color-white);
  transform: translateX(3px);
}

.footer-cta {
  padding-left: clamp(1.5rem, 3vw, 2.5rem);
  border-left: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-cta > span {
  color: #6fcfc3;
  font-size: var(--font-size-xs);
}

.footer-cta h2 {
  margin-top: var(--space-3);
  font-size: var(--font-size-md);
}

.button-footer {
  margin-top: var(--space-6);
  color: var(--color-navy);
  background: var(--color-white);
}

.button-footer:hover {
  color: var(--color-primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.footer-bottom {
  display: flex;
  min-height: 76px;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
  border-top: 1px solid rgba(255, 255, 255, 0.09);
}

.footer-bottom p {
  color: #7188a5;
  font-size: var(--font-size-xs);
}

/* 返回顶部与进入视口动画 */
.back-to-top {
  position: fixed;
  z-index: 900;
  right: max(22px, env(safe-area-inset-right));
  bottom: max(22px, env(safe-area-inset-bottom));
  display: grid;
  width: 46px;
  height: 46px;
  place-items: center;
  color: var(--color-white);
  background: var(--color-navy);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 14px;
  box-shadow: var(--shadow-md);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(14px);
  transition:
    opacity var(--duration-normal) var(--ease-standard),
    transform var(--duration-normal) var(--ease-standard),
    background-color var(--duration-fast) var(--ease-standard);
}

.back-to-top.visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-primary);
}

.back-to-top svg {
  width: 22px;
  height: 22px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition:
    opacity var(--duration-slow) var(--ease-standard),
    transform var(--duration-slow) var(--ease-standard);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.business-grid .reveal:nth-child(2),
.ai-products .reveal:nth-child(2),
.scenario-grid .reveal:nth-child(2),
.scenario-grid .reveal:nth-child(6) {
  transition-delay: 70ms;
}

.business-grid .reveal:nth-child(3),
.ai-products .reveal:nth-child(3),
.scenario-grid .reveal:nth-child(3),
.scenario-grid .reveal:nth-child(7) {
  transition-delay: 140ms;
}

.business-grid .reveal:nth-child(4),
.scenario-grid .reveal:nth-child(4),
.scenario-grid .reveal:nth-child(8) {
  transition-delay: 210ms;
}

@keyframes heroCopyIn {
  from {
    opacity: 0;
    transform: translateY(24px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes processDot {
  from {
    left: calc(100% / 12);
  }
  to {
    left: calc(100% - 100% / 12);
  }
}

@keyframes typing {
  0%,
  60%,
  100% {
    opacity: 0.35;
    transform: translateY(0);
  }
  30% {
    opacity: 1;
    transform: translateY(-3px);
  }
}

@media (prefers-reduced-motion: reduce) {
  .reveal {
    opacity: 1;
    transform: none;
  }
}