:root {
  --bg: #f7f8f6;
  --paper: #ffffff;
  --ink: #171819;
  --muted: #6e7370;
  --line: #e6e8e3;
  --soft: #f1f3ef;
  --orange: #ff6b1a;
  --orange-2: #ff9346;
  --green: #285b2a;
  --green-2: #6f8f36;
  --shadow: 0 28px 80px rgba(28, 32, 28, 0.12);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Inter", system-ui, -apple-system, BlinkMacSystemFont, sans-serif;
  letter-spacing: 0;
}

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

img,
video {
  display: block;
  max-width: 100%;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  padding: 0 clamp(22px, 5vw, 72px);
  border-bottom: 1px solid rgba(230, 232, 227, 0.88);
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 4px;
  font-weight: 900;
  color: #222422;
}

.brand strong {
  color: var(--orange);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 14px;
  font-weight: 700;
  color: #777b77;
}

.main-nav a {
  position: relative;
  padding: 9px 0;
}

.main-nav a.active {
  color: var(--orange);
}

.main-nav a.active::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 2px;
  background: var(--orange);
  content: "";
}

.main-nav .login {
  padding: 10px 18px;
  border-radius: var(--radius);
  background: var(--orange);
  color: #fff;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
}

.section-pad {
  padding: clamp(58px, 7vw, 96px) clamp(22px, 5vw, 72px);
}

.hero {
  min-height: min(760px, calc(100vh - 76px));
  background:
    radial-gradient(circle at 88% 8%, rgba(255, 107, 26, 0.13), transparent 34%),
    linear-gradient(180deg, #ffffff 0%, #f6f8f4 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(360px, 0.82fr) minmax(520px, 1.18fr);
  gap: 42px;
  align-items: stretch;
  max-width: 1240px;
  margin: 0 auto;
}

.hero-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  padding: 34px 0;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 8em;
  margin-bottom: 18px;
  font-size: clamp(56px, 6vw, 84px);
  font-weight: 900;
  line-height: 0.98;
  overflow-wrap: anywhere;
}

.hero-kicker {
  margin-bottom: 20px;
  color: var(--orange);
  font-size: clamp(20px, 2.2vw, 30px);
  font-weight: 900;
}

.hero-copy {
  max-width: 560px;
  margin-bottom: 32px;
  color: #555b56;
  font-size: 18px;
  line-height: 1.88;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 34px;
}

.primary-btn,
.ghost-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 900;
}

.primary-btn {
  gap: 10px;
  background: var(--orange);
  color: #fff;
  box-shadow: 0 14px 32px rgba(255, 107, 26, 0.25);
}

.primary-btn svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2.4;
}

.ghost-btn {
  border: 1px solid var(--line);
  background: #fff;
}

.hero-proof {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.hero-proof span {
  padding: 10px 14px;
  border: 1px solid rgba(40, 91, 42, 0.16);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.68);
  color: var(--green);
  font-size: 13px;
  font-weight: 900;
}

.hero-media {
  position: relative;
  min-height: 612px;
  overflow: hidden;
  border-radius: var(--radius);
  background: #171819;
  box-shadow: var(--shadow);
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 42%, rgba(9, 10, 11, 0.62) 100%);
  pointer-events: none;
}

.status-panel {
  position: absolute;
  right: 22px;
  bottom: 22px;
  left: 22px;
  padding: 18px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  background: rgba(21, 22, 24, 0.78);
  color: #fff;
  backdrop-filter: blur(16px);
}

.status-panel span,
.status-panel small {
  color: rgba(255, 255, 255, 0.68);
  font-size: 12px;
  font-weight: 700;
}

.status-panel strong {
  display: block;
  margin: 6px 0 12px;
  font-size: 17px;
}

.progress {
  height: 6px;
  margin-bottom: 10px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.14);
}

.progress i {
  position: relative;
  display: block;
  width: 100%;
  height: 100%;
  overflow: hidden;
  border-radius: inherit;
  background: linear-gradient(90deg, var(--orange), #ffd48d);
  box-shadow: 0 0 14px rgba(255, 151, 61, 0.42);
  transform: scaleX(0.16);
  transform-origin: left center;
  animation: task-progress-fill 6s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

.progress i::after {
  position: absolute;
  inset: 0;
  content: "";
  background: linear-gradient(90deg, transparent 0%, rgba(255, 255, 255, 0.85) 50%, transparent 100%);
  transform: translateX(-120%);
  animation: task-progress-shine 1.8s ease-in-out infinite;
}

@keyframes task-progress-fill {
  0% {
    transform: scaleX(0.16);
  }
  72% {
    transform: scaleX(0.88);
  }
  88% {
    transform: scaleX(0.94);
  }
  100% {
    transform: scaleX(0.16);
  }
}

@keyframes task-progress-shine {
  0%,
  18% {
    transform: translateX(-120%);
  }
  72%,
  100% {
    transform: translateX(120%);
  }
}

.section-head {
  max-width: 840px;
  margin: 0 auto 38px;
  text-align: center;
}

.section-head.compact {
  margin-bottom: 26px;
}

.section-head span {
  display: block;
  margin-bottom: 12px;
  color: var(--orange);
  font-size: 13px;
  font-weight: 900;
}

.section-head h2,
.cta h2 {
  margin-bottom: 14px;
  font-size: clamp(32px, 4vw, 46px);
  font-weight: 900;
  line-height: 1.08;
}

.intro > .section-head > h2,
.workflow > .section-head > h2,
.scenes > .section-head > h2 {
  font-size: 56px;
}

.section-head p,
.cta p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.85;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
  max-width: 1180px;
  margin: 0 auto;
}

.module-layout {
  display: grid;
  grid-template-columns: minmax(420px, 0.94fr) minmax(360px, 0.76fr);
  gap: 24px;
  align-items: stretch;
  max-width: 1180px;
  margin: 0 auto 18px;
}

.module-visual {
  min-height: 430px;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  background: #121313;
  box-shadow: var(--shadow);
}

.module-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.module-copy {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: clamp(28px, 4vw, 48px);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(255, 107, 26, 0.08), transparent 46%),
    #fff;
}

.module-copy h3 {
  margin-bottom: 18px;
  font-size: clamp(28px, 3vw, 42px);
  line-height: 1.16;
}

.module-copy p {
  color: #59605b;
  font-size: 17px;
  line-height: 1.9;
}

.module-copy dl {
  display: grid;
  gap: 12px;
  margin: 22px 0 0;
}

.module-copy dl div {
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.module-copy dt {
  margin-bottom: 7px;
  color: var(--green);
  font-weight: 900;
}

.module-copy dd {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.value-grid article {
  min-height: 260px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper);
}

.value-grid b {
  color: var(--orange);
  font-size: 13px;
}

.value-grid h3 {
  margin: 50px 0 14px;
  font-size: 26px;
}

.value-grid p {
  color: var(--muted);
  line-height: 1.8;
}

.workflow {
  background: #ffffff;
}

.workflow.section-pad {
  padding-top: clamp(46px, 5vw, 72px);
}

.workflow > .section-head.compact {
  margin-bottom: 50px;
}

.workflow-shell {
  max-width: 1180px;
  margin: 0 auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #f8faf5;
  box-shadow: 0 22px 70px rgba(28, 32, 28, 0.08);
}

.step-tabs {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  border-bottom: 1px solid var(--line);
}

.step-tab {
  min-height: 92px;
  padding: 18px;
  border: 0;
  border-right: 1px solid var(--line);
  background: transparent;
  color: #6e7370;
  text-align: left;
  cursor: pointer;
}

.step-tab:last-child {
  border-right: 0;
}

.step-tab b {
  display: block;
  margin-bottom: 8px;
  color: var(--orange);
  font-size: 12px;
}

.step-tab span {
  display: block;
  color: #262a26;
  font-size: 15px;
  font-weight: 900;
  line-height: 1.35;
}

.step-tab.active {
  background: #1c211b;
}

.step-tab.active span {
  color: #fff;
}

.step-stage {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 26px;
  padding: 34px;
}

.step-index {
  color: var(--orange);
  font-size: 13px;
  font-weight: 900;
}

.step-stage h3 {
  margin-bottom: 18px;
  font-size: clamp(30px, 4vw, 52px);
  line-height: 1.05;
}

.step-stage p[data-step-desc] {
  color: #4d554e;
  font-size: 18px;
  line-height: 1.9;
}

.step-meta {
  display: grid;
  gap: 12px;
  margin: 30px 0 0;
}

.step-meta div {
  padding: 16px;
  border-radius: var(--radius);
  background: #fff;
}

.step-meta dt {
  margin-bottom: 8px;
  color: var(--green);
  font-size: 13px;
  font-weight: 900;
}

.step-meta dd {
  margin: 0;
  color: #5b625c;
  line-height: 1.65;
}

.step-stage figure {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 420px;
  margin: 0;
  overflow: hidden;
  border-radius: var(--radius);
  background: #050608;
}

.step-stage img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.scene-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: 1fr;
  align-items: stretch;
  gap: 18px;
  max-width: 1180px;
  margin: 0 auto;
}

.scene-wave {
  display: flex;
  height: 100%;
  min-height: 250px;
  transition: transform 0.35s ease;
}

.scene-card {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-rows: auto auto 1fr auto;
  width: 100%;
  height: 100%;
  min-height: 248px;
  padding: 22px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius);
  background: #0d1014;
  box-shadow: 0 16px 38px rgba(0, 0, 0, 0.22);
  transition: border-color 0.35s ease, background 0.35s ease, transform 0.35s ease;
}

.scene-wave:hover {
  transform: translateY(-3px);
}

.scene-wave:hover .scene-card {
  border-color: rgba(255, 139, 64, 0.28);
  background: #11151a;
}

.scene-card b {
  color: #ff7a2f;
  font-size: 12px;
}

.scene-card h3 {
  margin: 20px 0 12px;
  color: #ffffff;
  font-size: 20px;
  line-height: 1.28;
}

.scene-card p {
  margin-bottom: 18px;
  color: #c3c9d1;
  font-size: 14px;
  line-height: 1.75;
}

.scene-card small {
  color: #b8e68f;
  font-weight: 900;
  line-height: 1.5;
}

.cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin: clamp(22px, 5vw, 72px);
  padding: clamp(30px, 5vw, 58px);
  border-radius: var(--radius);
  background:
    linear-gradient(135deg, rgba(255, 107, 26, 0.94), rgba(255, 147, 70, 0.82)),
    var(--orange);
  color: #fff;
}

.cta h2 {
  margin-bottom: 10px;
}

.cta p {
  margin-bottom: 0;
  color: rgba(255, 255, 255, 0.86);
}

.primary-btn.dark {
  flex: 0 0 auto;
  background: #171819;
  box-shadow: none;
}

.site-footer {
  display: grid;
  grid-template-columns: 1.4fr repeat(3, 1fr);
  gap: 34px;
  padding: 54px clamp(22px, 5vw, 72px);
  border-top: 1px solid var(--line);
  background: #fff;
  color: #747a75;
  font-size: 14px;
}

.site-footer strong {
  display: block;
  margin-bottom: 16px;
  color: #252825;
}

.site-footer a,
.site-footer p {
  display: block;
  margin: 0 0 11px;
}

@media (max-width: 1180px) {
  .hero-grid {
    grid-template-columns: 1fr;
    max-width: 920px;
  }

  .hero-content {
    padding-right: 0;
  }

  .hero-media {
    min-height: 560px;
  }

  .scene-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 860px) {
  .intro > .section-head > h2,
  .workflow > .section-head > h2,
  .scenes > .section-head > h2 {
    font-size: 44px;
  }

  .site-header {
    height: 68px;
  }

  .nav-toggle {
    display: block;
  }

  .main-nav {
    position: absolute;
    top: 68px;
    right: 16px;
    left: 16px;
    display: none;
    grid-template-columns: 1fr 1fr;
    gap: 0;
    padding: 14px;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    background: #fff;
    box-shadow: var(--shadow);
  }

  .main-nav.open {
    display: grid;
  }

  .main-nav a {
    padding: 13px;
  }

  .hero-grid,
  .step-stage {
    grid-template-columns: 1fr;
  }

  .hero-content {
    order: 1;
    padding: 12px 0 0;
  }

  .hero-media {
    order: 2;
    min-height: 440px;
  }

  h1 {
    max-width: 9em;
  }

  .value-grid,
  .module-layout,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .step-tabs {
    grid-template-columns: 1fr;
  }

  .step-tab {
    min-height: 64px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .cta {
    align-items: flex-start;
    flex-direction: column;
  }
}

@media (max-width: 580px) {
  .section-pad {
    padding: 48px 18px;
  }

  .hero {
    min-height: auto;
  }

  .hero-copy,
  .section-head p {
    font-size: 16px;
  }

  h1 {
    max-width: 100%;
    font-size: 42px;
    line-height: 1.08;
  }

  .intro > .section-head > h2,
  .workflow > .section-head > h2,
  .scenes > .section-head > h2 {
    font-size: 34px;
  }

  .hero-media {
    min-height: 360px;
  }

  .status-panel {
    right: 14px;
    bottom: 14px;
    left: 14px;
  }

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

  .scene-card,
  .scene-wave,
  .value-grid article {
    min-height: auto;
  }

}

@media (prefers-reduced-motion: reduce) {
  .scene-wave,
  .scene-wave:hover {
    transform: none;
  }

  .progress i,
  .progress i::after {
    animation: none;
  }

  .progress i {
    transform: scaleX(0.68);
  }
}

/* Dark product experience */
:root {
  --bg: #050608;
  --paper: #101318;
  --ink: #f5f7fa;
  --muted: #9aa3ae;
  --line: rgba(255, 255, 255, 0.12);
  --soft: #0b0e12;
  --green: #9bcf78;
  --green-2: #b5dc83;
  --shadow: 0 28px 80px rgba(0, 0, 0, 0.42);
}

body,
main,
.intro,
.scenes {
  background: #050608;
}

.site-header {
  border-bottom-color: rgba(255, 255, 255, 0.1);
  background: rgba(5, 6, 8, 0.9);
}

.brand,
.site-footer .brand,
.site-footer strong {
  color: #f5f7fa;
}

.main-nav {
  color: #a6adb7;
}

.hero {
  background:
    radial-gradient(circle at 84% 12%, rgba(255, 107, 26, 0.2), transparent 34%),
    radial-gradient(circle at 12% 74%, rgba(61, 97, 72, 0.16), transparent 38%),
    linear-gradient(180deg, #080a0e 0%, #050608 100%);
}

.hero-copy,
.module-copy p,
.step-stage p[data-step-desc] {
  color: #aeb6c1;
}

.ghost-btn,
.hero-proof span,
.module-copy,
.value-grid article,
.workflow-shell,
.step-meta div {
  border-color: rgba(255, 255, 255, 0.12);
  background: #101318;
  color: #eef1f5;
}

.hero-proof span,
.module-copy dt,
.step-meta dt,
.scene-card small {
  color: #a9d88a;
}

.module-copy {
  background:
    linear-gradient(135deg, rgba(255, 107, 26, 0.13), transparent 46%),
    #101318;
}

.workflow {
  background: #090b0f;
}

.workflow-shell {
  box-shadow: 0 22px 70px rgba(0, 0, 0, 0.34);
}

.step-tab {
  color: #939ca8;
}

.step-tab span,
.step-stage h3 {
  color: #f5f7fa;
}

.step-tab.active {
  background: #20252d;
}

.step-meta dd,
.site-footer {
  color: #9aa3ae;
}

.site-footer {
  border-top-color: rgba(255, 255, 255, 0.1);
  background: #080a0d;
}

@media (max-width: 860px) {
  .nav-toggle,
  .main-nav {
    border-color: rgba(255, 255, 255, 0.12);
    background: #0d1015;
  }

  .nav-toggle span {
    background: #f5f7fa;
  }
}