:root {
  --ink: #111a33;
  --ink-soft: #273a66;
  --muted: #657391;
  --line: #dfe8fb;
  --line-strong: #c3d5f4;
  --surface: #ffffff;
  --surface-soft: #f7fbff;
  --blue: #3b4df5;
  --blue-deep: #2434d6;
  --sky: #2f83ff;
  --cyan: #11a7bf;
  --green: #17a873;
  --amber: #ef8a22;
  --rose: #f15f73;
  --violet: #7755e8;
  --shadow: 0 20px 56px rgba(43, 80, 150, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(rgba(62, 93, 190, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(62, 93, 190, 0.045) 1px, transparent 1px),
    linear-gradient(180deg, #f2f6ff 0%, #ffffff 42%, #f8fbff 100%);
  background-size: 34px 34px, 34px 34px, auto;
  font-family: Arial, "Microsoft YaHei", "PingFang SC", sans-serif;
  letter-spacing: 0;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

img,
svg {
  display: block;
}

button,
input,
textarea,
select {
  font: inherit;
  letter-spacing: 0;
}

.skip-link {
  position: fixed;
  top: -48px;
  left: 16px;
  z-index: 100;
  border-radius: 8px;
  background: var(--blue);
  color: #fff;
  padding: 10px 14px;
  font-weight: 800;
}

.skip-link:focus {
  top: 16px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid rgba(203, 215, 242, 0.86);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
}

.site-nav {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 22px;
  width: min(1320px, calc(100% - 48px));
  min-height: 76px;
  margin: 0 auto;
}

.brand,
.footer-brand,
.app-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
  font-weight: 900;
}

.brand,
.footer-brand {
  color: #122461;
  font-size: 20px;
}

.brand img,
.footer-brand img {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  object-fit: cover;
}

.nav-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  color: #33446c;
  font-size: 15px;
  font-weight: 800;
}

.nav-links a {
  white-space: nowrap;
}

.nav-links a:hover {
  color: var(--blue);
}

.nav-actions,
.hero-actions,
.cta-actions {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 42px;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 0 18px;
  font-size: 15px;
  font-weight: 900;
  line-height: 1;
  transition: transform 160ms ease, box-shadow 160ms ease, background-color 160ms ease, border-color 160ms ease;
}

.button svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.button:hover {
  transform: translateY(-1px);
}

.button-primary {
  background: var(--blue);
  color: #fff;
  box-shadow: 0 12px 28px rgba(59, 77, 245, 0.28);
}

.button-primary:hover {
  background: var(--blue-deep);
}

.button-secondary,
.button-ghost {
  border-color: #c8d6f2;
  background: #fff;
  color: #2339d6;
}

.button-secondary:hover,
.button-ghost:hover {
  border-color: #9eb8ed;
  background: #f4f8ff;
}

.button-light {
  background: #fff;
  color: #2339d6;
}

.button-outline-light {
  border-color: rgba(255, 255, 255, 0.76);
  color: #fff;
}

.button-large {
  min-height: 52px;
  padding: 0 26px;
  font-size: 17px;
}

.hero {
  position: relative;
  min-height: 742px;
  overflow: hidden;
  border-bottom: 1px solid rgba(199, 214, 244, 0.75);
  background:
    linear-gradient(110deg, rgba(76, 98, 255, 0.1) 0%, rgba(76, 98, 255, 0) 34%),
    linear-gradient(130deg, #f2f5ff 0%, #ffffff 46%, #eef7ff 100%);
}

.hero-pattern {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(rgba(64, 89, 206, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(64, 89, 206, 0.07) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(90deg, black 0%, black 55%, transparent 92%);
}

.hero-pattern::after {
  content: "F = ma    E = mc²    v² - v₀² = 2as";
  position: absolute;
  right: 7%;
  bottom: 7%;
  color: rgba(52, 69, 145, 0.12);
  font-size: 34px;
  font-weight: 900;
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  width: min(1320px, calc(100% - 48px));
  min-height: 674px;
  margin: 0 auto;
  padding: 42px 0 110px;
}

.hero-copy {
  max-width: 545px;
}

.eyebrow,
.section-kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 12px;
  color: var(--blue);
  font-size: 13px;
  font-weight: 950;
  text-transform: uppercase;
}

.section-kicker::before,
.section-kicker::after {
  content: "";
  width: 22px;
  height: 2px;
  border-radius: 8px;
  background: currentColor;
  opacity: 0.42;
}

.hero h1 {
  margin: 0;
  color: #101a42;
  font-size: 54px;
  line-height: 1.12;
  font-weight: 950;
}

.hero h1 span {
  color: var(--blue);
}

.hero-lead {
  margin: 22px 0 0;
  color: #435374;
  font-size: 17px;
  font-weight: 700;
  line-height: 1.9;
}

.hero-actions {
  margin-top: 28px;
}

.release-note {
  display: inline-flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 10px;
  margin: 16px 0 0;
  border: 1px solid #d6e2f7;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 10px 24px rgba(43, 80, 150, 0.08);
  color: #536280;
  padding: 10px 13px;
  font-size: 14px;
  font-weight: 900;
  transition: transform 160ms ease, box-shadow 160ms ease, border-color 160ms ease, background-color 160ms ease;
}

.release-note svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.release-note strong {
  color: var(--blue);
  font-size: 16px;
}

.release-note:hover,
.release-note:focus-visible {
  border-color: #9eb8ed;
  background: #fff;
  box-shadow: 0 14px 30px rgba(43, 80, 150, 0.12);
  color: #2339d6;
  transform: translateY(-1px);
}

.release-note:focus-visible {
  outline: 3px solid rgba(59, 77, 245, 0.2);
  outline-offset: 3px;
}

.hero-features {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.hero-features span {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  border: 1px solid #d6e2f7;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.76);
  color: #33446c;
  padding: 0 12px;
  font-size: 14px;
  font-weight: 900;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
  margin: 34px 0 0;
  max-width: 560px;
}

.hero-stats div {
  min-width: 0;
}

.hero-stats dt {
  color: var(--blue);
  font-size: 27px;
  font-weight: 950;
}

.hero-stats dd {
  margin: 6px 0 0;
  color: #5d6a86;
  font-size: 13px;
  font-weight: 800;
}

.hero-app {
  position: absolute;
  z-index: 1;
  top: 104px;
  right: max(24px, calc((100vw - 1320px) / 2 - 80px));
  width: min(720px, 43vw);
  border: 1px solid rgba(180, 197, 236, 0.9);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.92);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-screenshot {
  margin: 0;
}

.hero-screenshot img {
  display: block;
  width: 100%;
  height: auto;
}

.app-topbar {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto auto;
  align-items: center;
  gap: 10px;
  min-height: 58px;
  border-bottom: 1px solid #e2ebfb;
  padding: 0 16px;
  background: linear-gradient(180deg, #fbfdff, #f4f8ff);
}

.app-logo {
  font-size: 14px;
  color: #14285d;
}

.app-logo img {
  width: 28px;
  height: 28px;
  border-radius: 8px;
}

.model-pill,
.credit-pill {
  min-height: 28px;
  border: 1px solid #d7e2f8;
  border-radius: 8px;
  background: #fff;
  color: #536280;
  padding: 7px 10px 0;
  font-size: 12px;
  font-weight: 900;
}

.credit-pill {
  color: var(--blue);
}

.app-layout {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  min-height: 486px;
  background:
    linear-gradient(rgba(50, 88, 190, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(50, 88, 190, 0.045) 1px, transparent 1px),
    #f8fbff;
  background-size: 28px 28px;
}

.app-sidebar {
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-right: 1px solid #dfe8fb;
  background: rgba(255, 255, 255, 0.88);
  padding: 16px 12px;
}

.app-sidebar span {
  min-height: 34px;
  border-radius: 8px;
  color: #61708e;
  padding: 10px 10px 0;
  font-size: 12px;
  font-weight: 900;
}

.app-sidebar .active {
  background: var(--blue);
  color: #fff;
}

.app-main {
  min-width: 0;
  padding: 18px;
}

.task-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.task-grid article {
  min-height: 112px;
  border: 1px solid #dfe8fb;
  border-radius: 8px;
  background: #fff;
  padding: 15px;
  box-shadow: 0 10px 20px rgba(43, 80, 150, 0.06);
}

.task-grid b,
.task-grid span {
  display: block;
}

.task-grid b {
  color: #17275a;
  font-size: 14px;
}

.task-grid span {
  margin-top: 9px;
  color: #6c7892;
  font-size: 12px;
  line-height: 1.5;
}

.workbench {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 204px;
  gap: 14px;
  margin-top: 14px;
}

.chat-panel,
.result-panel {
  border: 1px solid #dfe8fb;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.96);
  box-shadow: 0 12px 24px rgba(43, 80, 150, 0.07);
}

.chat-panel {
  min-height: 304px;
  padding: 14px;
}

.chat-row {
  max-width: 92%;
  border-radius: 8px;
  padding: 10px 12px;
  font-size: 12px;
  font-weight: 800;
  line-height: 1.55;
}

.chat-row.user {
  margin-left: auto;
  background: #eef3ff;
  color: #284172;
}

.chat-row.ai {
  background: #edf9f5;
  color: #1f6c53;
}

.physics-preview {
  display: grid;
  place-items: center;
  min-height: 186px;
  margin: 13px 0;
  border: 1px solid #e0e9fb;
  border-radius: 8px;
  background: #fbfdff;
}

.physics-preview svg {
  width: min(100%, 340px);
}

.physics-preview text {
  fill: #18356f;
  font: 18px Arial, sans-serif;
  font-weight: 800;
}

.result-panel {
  padding: 14px;
}

.result-panel h3 {
  margin: 0;
  color: #18295d;
  font-size: 14px;
}

.result-panel ul {
  display: grid;
  gap: 10px;
  margin: 14px 0 0;
  padding: 0;
  list-style: none;
}

.result-panel li {
  display: grid;
  grid-template-columns: 8px minmax(0, 1fr);
  gap: 8px;
  align-items: start;
  color: #5b6883;
  font-size: 12px;
  line-height: 1.4;
}

.result-panel li span {
  width: 8px;
  height: 8px;
  margin-top: 4px;
  border-radius: 8px;
  background: var(--green);
}

.result-panel li b {
  display: block;
  color: var(--blue);
  margin-top: 2px;
}

.mini-chart {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  align-items: end;
  gap: 7px;
  height: 72px;
  margin-top: 18px;
}

.mini-chart i {
  border-radius: 8px 8px 0 0;
  background: linear-gradient(180deg, #6d7cff, #2f83ff);
}

.mini-chart i:nth-child(1) {
  height: 44%;
}

.mini-chart i:nth-child(2) {
  height: 68%;
  background: linear-gradient(180deg, #25bdd3, #11a7bf);
}

.mini-chart i:nth-child(3) {
  height: 56%;
}

.mini-chart i:nth-child(4) {
  height: 88%;
  background: linear-gradient(180deg, #24ba83, #17a873);
}

.mini-chart i:nth-child(5) {
  height: 72%;
}

.section-block {
  position: relative;
  width: min(1320px, calc(100% - 48px));
  margin: 0 auto;
  padding: 64px 0;
}

.section-head {
  max-width: 760px;
  margin: 0 auto 30px;
  text-align: center;
}

.section-head h2,
.feature-panel h2,
.cta-section h2 {
  margin: 0;
  color: #111a42;
  font-size: 34px;
  line-height: 1.26;
  font-weight: 950;
}

.section-head p,
.feature-panel p,
.cta-section p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
  font-weight: 700;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 18px;
}

.value-card,
.audience-grid article,
.scenario-grid article,
.feature-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 14px 32px rgba(43, 80, 150, 0.08);
}

.value-card {
  min-height: 204px;
  padding: 22px;
}

.icon-box {
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  border-radius: 8px;
  margin-bottom: 16px;
}

.icon-box svg {
  width: 29px;
  height: 29px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.icon-box.violet {
  background: #f1edff;
  color: var(--violet);
}

.icon-box.blue {
  background: #edf3ff;
  color: var(--sky);
}

.icon-box.amber {
  background: #fff2e4;
  color: var(--amber);
}

.icon-box.green {
  background: #eafaf4;
  color: var(--green);
}

.icon-box.cyan {
  background: #e9faff;
  color: var(--cyan);
}

.value-card h3,
.module-card h3,
.audience-grid h3,
.flow-line h3,
.scenario-grid h3 {
  margin: 0;
  color: #142452;
  font-size: 19px;
  line-height: 1.35;
  font-weight: 950;
}

.value-card p,
.module-card p,
.audience-grid p,
.flow-line p,
.scenario-grid p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
  font-weight: 700;
}

.module-section {
  width: min(1260px, calc(100% - 48px));
}

.module-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.module-card {
  display: grid;
  grid-template-rows: auto 188px;
  min-height: 540px;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
  box-shadow: 0 18px 38px rgba(43, 80, 150, 0.1);
}

.module-copy {
  padding: 26px 22px 10px;
}

.module-tag {
  display: inline-flex;
  align-items: center;
  min-height: 26px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.76);
  padding: 0 10px;
  font-size: 12px;
  font-weight: 950;
}

.drawing {
  background: linear-gradient(180deg, #f0edff 0%, #fff 55%);
}

.solve {
  background: linear-gradient(180deg, #eef5ff 0%, #fff 55%);
}

.audit {
  background: linear-gradient(180deg, #fff2e5 0%, #fff 55%);
}

.table {
  background: linear-gradient(180deg, #eafaf3 0%, #fff 55%);
}

.drawing .module-tag,
.drawing h3 {
  color: #5030d9;
}

.solve .module-tag,
.solve h3 {
  color: #2457dc;
}

.audit .module-tag,
.audit h3 {
  color: #d45d17;
}

.table .module-tag,
.table h3 {
  color: #10845b;
}

.module-card h3 {
  margin-top: 16px;
  font-size: 25px;
}

.module-card ul,
.check-list {
  display: grid;
  gap: 10px;
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.module-card li,
.check-list li {
  position: relative;
  padding-left: 22px;
  color: #465575;
  font-size: 14px;
  line-height: 1.55;
  font-weight: 800;
}

.module-card li::before,
.check-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 10px;
  height: 10px;
  border-radius: 8px;
  background: currentColor;
  opacity: 0.7;
}

.module-visual {
  align-self: end;
  margin: 0 20px 22px;
  border: 1px solid rgba(190, 207, 239, 0.84);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 12px 26px rgba(43, 80, 150, 0.08);
}

.diagram-visual {
  display: grid;
  place-items: center;
}

.diagram-visual svg {
  width: 88%;
  height: auto;
}

.diagram-visual path,
.diagram-visual circle,
.diagram-visual line {
  fill: none;
  stroke: #5030d9;
  stroke-width: 4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.diagram-visual path:first-child {
  fill: rgba(80, 48, 217, 0.05);
}

.steps-visual {
  display: grid;
  gap: 10px;
  align-content: center;
  padding: 18px;
}

.steps-visual span {
  min-height: 28px;
  border-radius: 8px;
  background: #eef5ff;
  color: #2457dc;
  padding: 7px 10px 0;
  font-size: 12px;
  font-weight: 900;
}

.audit-visual {
  position: relative;
  padding: 24px;
}

.audit-visual div {
  position: absolute;
  right: 20px;
  bottom: 18px;
  width: 72px;
  height: 72px;
  border: 8px solid rgba(212, 93, 23, 0.28);
  border-radius: 50%;
}

.audit-visual div::after {
  content: "";
  position: absolute;
  right: -30px;
  bottom: -20px;
  width: 42px;
  height: 8px;
  border-radius: 8px;
  background: #d45d17;
  transform: rotate(45deg);
}

.audit-visual span,
.table-visual span {
  display: block;
  height: 16px;
  border-radius: 8px;
  background: rgba(212, 93, 23, 0.16);
  margin-bottom: 16px;
}

.audit-visual span:nth-child(3) {
  width: 74%;
}

.audit-visual span:nth-child(4) {
  width: 58%;
}

.table-visual {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 14px;
  align-items: center;
  padding: 22px;
}

.pie {
  width: 78px;
  height: 78px;
  border-radius: 50%;
  background: conic-gradient(#10845b 0 42%, #29b7c8 42% 64%, #6b7bff 64% 82%, #dbeafe 82% 100%);
}

.table-visual span {
  background: rgba(16, 132, 91, 0.16);
}

.table-visual span:nth-child(3) {
  width: 76%;
}

.table-visual span:nth-child(4) {
  width: 62%;
}

.audience-section {
  padding-top: 40px;
}

.audience-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.audience-grid article {
  min-height: 214px;
  padding: 24px;
}

.role-avatar {
  display: grid;
  place-items: center;
  width: 66px;
  height: 66px;
  border-radius: 8px;
  margin-bottom: 18px;
  color: #fff;
  font-size: 28px;
  font-weight: 950;
}

.role-avatar.teacher {
  background: linear-gradient(135deg, #2563eb, #6d7cff);
}

.role-avatar.research {
  background: linear-gradient(135deg, #0aa6c0, #59d6c4);
}

.role-avatar.contest {
  background: linear-gradient(135deg, #ef8a22, #f7b955);
}

.role-avatar.group {
  background: linear-gradient(135deg, #17a873, #55c58f);
}

.workflow-section {
  width: min(1280px, calc(100% - 48px));
}

.flow-line {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.9);
  padding: 18px;
  box-shadow: 0 16px 36px rgba(43, 80, 150, 0.08);
}

.flow-line article {
  position: relative;
  min-height: 176px;
  border: 1px solid #e0e9fb;
  border-radius: 8px;
  background: #fbfdff;
  padding: 22px 18px;
}

.flow-line article:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 50%;
  right: -23px;
  z-index: 1;
  width: 28px;
  height: 2px;
  background: #bfd2f3;
}

.flow-line span {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  border-radius: 8px;
  background: #eef3ff;
  color: var(--blue);
  padding: 0 10px;
  margin-bottom: 18px;
  font-size: 13px;
  font-weight: 950;
}

.split-section {
  padding-top: 44px;
}

.split-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 20px;
}

.feature-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(260px, 0.78fr);
  gap: 24px;
  align-items: center;
  min-height: 360px;
  padding: 30px;
}

.team-panel {
  grid-template-columns: minmax(0, 1fr);
  align-content: center;
}

.desktop-window {
  border: 1px solid #d9e5f9;
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 18px 34px rgba(43, 80, 150, 0.12);
  overflow: hidden;
}

.window-title {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  min-height: 44px;
  border-bottom: 1px solid #e2ebfb;
  padding: 13px 14px 0;
  color: #17295f;
  font-size: 13px;
  font-weight: 950;
}

.window-title b {
  color: var(--blue);
}

.capture-preview {
  display: grid;
  place-items: center;
  min-height: 150px;
  background:
    linear-gradient(rgba(59, 77, 245, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(59, 77, 245, 0.04) 1px, transparent 1px),
    #f8fbff;
  background-size: 22px 22px;
}

.capture-preview svg {
  width: 78%;
  height: auto;
}

.capture-preview path,
.capture-preview circle,
.capture-preview line {
  fill: none;
  stroke: #18356f;
  stroke-width: 4;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.desktop-window p {
  margin: 0;
  padding: 14px;
  color: #50607d;
  font-size: 13px;
  font-weight: 800;
  line-height: 1.6;
}

.team-tools {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  margin-top: 24px;
}

.team-tools span {
  display: grid;
  place-items: center;
  min-height: 78px;
  border: 1px solid #dfe8fb;
  border-radius: 8px;
  background: #f9fbff;
  color: #243866;
  font-size: 14px;
  font-weight: 950;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.scenario-grid article {
  padding: 20px;
}

.scene-visual {
  height: 150px;
  border: 1px solid #dfe8fb;
  border-radius: 8px;
  margin-bottom: 18px;
  background:
    linear-gradient(135deg, rgba(59, 77, 245, 0.08), rgba(17, 167, 191, 0.08)),
    #f8fbff;
  position: relative;
  overflow: hidden;
}

.scene-visual::before,
.scene-visual::after {
  content: "";
  position: absolute;
  border-radius: 8px;
  background: #fff;
  border: 1px solid #dfe8fb;
}

.scene-visual.board::before {
  left: 28px;
  top: 34px;
  width: 112px;
  height: 72px;
  background:
    linear-gradient(90deg, transparent 48%, rgba(37, 99, 235, 0.35) 49%, rgba(37, 99, 235, 0.35) 51%, transparent 52%),
    linear-gradient(rgba(37, 99, 235, 0.18) 1px, transparent 1px),
    #fff;
  background-size: auto, 20px 20px;
}

.scene-visual.board::after {
  right: 28px;
  top: 48px;
  width: 56px;
  height: 56px;
  border-color: #89a7f4;
  background: conic-gradient(#3b4df5 0 36%, #11a7bf 36% 64%, #dbeafe 64% 100%);
}

.scene-visual.redraw::before {
  left: 32px;
  top: 36px;
  width: 130px;
  height: 82px;
}

.scene-visual.redraw::after {
  right: 38px;
  top: 30px;
  width: 58px;
  height: 92px;
  background: linear-gradient(#eef3ff 16px, transparent 17px), #fff;
  background-size: 100% 24px;
}

.scene-visual.audit-scene::before {
  left: 28px;
  top: 30px;
  width: 128px;
  height: 90px;
  background: linear-gradient(#fff 16px, #eef3ff 17px, #eef3ff 28px, transparent 29px), #fff;
  background-size: 100% 28px;
}

.scene-visual.audit-scene::after {
  right: 34px;
  top: 44px;
  width: 64px;
  height: 64px;
  border: 8px solid rgba(239, 138, 34, 0.35);
  border-radius: 50%;
  background: transparent;
}

.scene-visual.report::before {
  left: 28px;
  top: 32px;
  width: 120px;
  height: 86px;
  background:
    linear-gradient(90deg, #3b4df5 0 18%, transparent 18%),
    linear-gradient(90deg, #11a7bf 0 34%, transparent 34%),
    linear-gradient(90deg, #17a873 0 48%, transparent 48%),
    #fff;
  background-size: 100% 18px;
  background-position: 0 16px, 0 42px, 0 68px;
  background-repeat: no-repeat;
}

.scene-visual.report::after {
  right: 34px;
  top: 42px;
  width: 68px;
  height: 68px;
  border-radius: 50%;
  background: conic-gradient(#3b4df5 0 44%, #17a873 44% 70%, #ef8a22 70% 100%);
}

.faq-section {
  width: min(1240px, calc(100% - 48px));
}

.faq-layout {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  align-items: start;
}

.faq-list {
  display: grid;
  gap: 14px;
}

details {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.94);
  box-shadow: 0 12px 28px rgba(43, 80, 150, 0.07);
  overflow: hidden;
}

summary {
  cursor: pointer;
  min-height: 64px;
  padding: 22px 46px 0 22px;
  color: #192b60;
  font-size: 16px;
  font-weight: 950;
  list-style: none;
  position: relative;
}

summary::-webkit-details-marker {
  display: none;
}

summary::after {
  content: "+";
  position: absolute;
  right: 22px;
  top: 18px;
  color: var(--blue);
  font-size: 24px;
  line-height: 1;
}

details[open] summary::after {
  content: "−";
}

details p {
  margin: 0;
  border-top: 1px solid #eef3ff;
  padding: 16px 22px 20px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
  line-height: 1.75;
}

.cta-section {
  margin-top: 30px;
  background:
    linear-gradient(rgba(255, 255, 255, 0.12) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.12) 1px, transparent 1px),
    linear-gradient(135deg, #3446eb 0%, #5145d8 52%, #0c9fbc 100%);
  background-size: 38px 38px, 38px 38px, auto;
  color: #fff;
}

.cta-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  gap: 28px;
  width: min(1180px, calc(100% - 48px));
  min-height: 190px;
  margin: 0 auto;
  padding: 34px 0;
}

.cta-section .section-kicker,
.cta-section h2,
.cta-section p {
  color: #fff;
}

.cta-section p {
  opacity: 0.84;
}

.site-footer {
  background: #fff;
  border-top: 1px solid #dfe8fb;
}

.footer-main {
  display: grid;
  grid-template-columns: minmax(280px, 1.2fr) minmax(0, 0.6fr) minmax(0, 0.6fr) minmax(210px, 0.8fr);
  gap: 28px;
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  padding: 34px 0 26px;
}

.footer-main p,
.footer-main address,
.copyright {
  color: #68758e;
  font-size: 13px;
  font-style: normal;
  font-weight: 700;
  line-height: 1.8;
}

.footer-version {
  display: inline-flex;
  gap: 6px;
  align-items: baseline;
  color: #33446c;
}

.footer-version strong {
  color: var(--blue);
}

.footer-links {
  display: grid;
  gap: 10px;
  align-content: start;
  color: #33446c;
  font-size: 14px;
  font-weight: 850;
}

.footer-links a:hover {
  color: var(--blue);
}

.copyright {
  width: min(1180px, calc(100% - 48px));
  margin: 0 auto;
  border-top: 1px solid #edf2fb;
  padding: 16px 0 22px;
}

@media (max-width: 1180px) {
  .site-nav {
    grid-template-columns: auto auto;
  }

  .nav-links {
    display: none;
  }

  .nav-actions {
    justify-content: end;
  }

  .hero {
    min-height: auto;
  }

  .hero-inner {
    min-height: 0;
    padding: 54px 0 28px;
  }

  .hero-copy {
    max-width: 720px;
  }

  .hero-app {
    position: relative;
    top: auto;
    right: auto;
    width: min(920px, calc(100% - 48px));
    margin: 0 auto 44px;
  }

  .value-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .module-grid,
  .audience-grid,
  .scenario-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .flow-line {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .flow-line article::after {
    display: none;
  }

  .split-grid,
  .feature-panel {
    grid-template-columns: minmax(0, 1fr);
  }

  .faq-layout {
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  }

}

@media (max-width: 760px) {
  .site-nav,
  .hero-inner,
  .section-block,
  .module-section,
  .workflow-section,
  .faq-section,
  .cta-inner,
  .footer-main,
  .copyright {
    width: min(100% - 28px, 720px);
  }

  .site-nav {
    min-height: 66px;
  }

  .brand span {
    font-size: 17px;
  }

  .brand img {
    width: 34px;
    height: 34px;
  }

  .nav-actions {
    display: none;
  }

  .hero h1 {
    font-size: 40px;
  }

  .hero-lead {
    font-size: 16px;
  }

  .hero-stats {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .hero-app {
    width: min(100% - 28px, 720px);
  }

  .app-topbar {
    grid-template-columns: minmax(0, 1fr);
    align-content: center;
    padding: 12px;
  }

  .model-pill,
  .credit-pill {
    display: none;
  }

  .app-layout {
    grid-template-columns: minmax(0, 1fr);
  }

  .app-sidebar {
    display: none;
  }

  .task-grid,
  .workbench,
  .value-grid,
  .module-grid,
  .audience-grid,
  .flow-line,
  .scenario-grid,
  .faq-layout,
  .team-tools,
  .footer-main,
  .cta-inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .result-panel {
    display: none;
  }

  .section-block {
    padding: 46px 0;
  }

  .section-head h2,
  .feature-panel h2,
  .cta-section h2 {
    font-size: 27px;
  }

  .section-kicker::before,
  .section-kicker::after {
    width: 16px;
  }

  .module-card {
    min-height: auto;
  }

  .feature-panel {
    padding: 22px;
  }

  .cta-actions {
    justify-content: start;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  .button {
    transition: none;
  }
}