:root {
  color-scheme: light;
  --ink: #242322;
  --muted: #77736d;
  --soft: #a9a39b;
  --line: #dedbd6;
  --paper: #f3f2ef;
  --panel: #fbfaf8;
  --white: #ffffff;
  --accent: #a9573f;
  --accent-dark: #1f1f1d;
  --blue: #0c98ff;
  --teal: #18b7a0;
  --violet: #8658e9;
  --warn: #f08065;
  --shadow: 0 18px 44px rgba(38, 35, 31, 0.11);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family:
    Inter, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

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

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

h1,
h2,
h3,
p {
  overflow-wrap: anywhere;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 28px;
  min-height: 66px;
  padding: 0 38px;
  border-bottom: 1px solid rgba(222, 219, 214, 0.88);
  background: rgba(243, 242, 239, 0.9);
  backdrop-filter: blur(18px);
}

.brand,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--soft);
  font-weight: 800;
  letter-spacing: 0;
}

.brand img,
.footer-brand img {
  width: 28px;
  height: 28px;
  border-radius: 7px;
}

.nav-links {
  display: flex;
  justify-content: center;
  gap: 30px;
  color: var(--muted);
  font-size: 14px;
}

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

.nav-action,
.primary-button,
.secondary-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 800;
  white-space: nowrap;
}

.primary-button,
.nav-action {
  color: #fff;
  background: var(--accent);
  box-shadow: 0 12px 26px rgba(169, 87, 63, 0.22);
}

.secondary-button {
  color: var(--ink);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.86);
}

.hero-section {
  position: relative;
  min-height: 88vh;
  overflow: hidden;
  display: flex;
  align-items: center;
  padding: 98px clamp(28px, 7vw, 132px) 92px;
  border-bottom: 1px solid var(--line);
  background: #eceae6;
}

.hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  filter: saturate(0.92);
}

.hero-section::after {
  position: absolute;
  inset: 0;
  content: "";
  background:
    linear-gradient(90deg, rgba(243, 242, 239, 0.98) 0%, rgba(243, 242, 239, 0.92) 35%, rgba(243, 242, 239, 0.42) 72%, rgba(243, 242, 239, 0.1) 100%),
    linear-gradient(180deg, rgba(243, 242, 239, 0.18) 0%, rgba(243, 242, 239, 0.76) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(760px, 100%);
  margin-left: clamp(0px, 4vw, 72px);
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(42px, 7vw, 76px);
  line-height: 1.04;
  letter-spacing: 0;
}

.hero-lead {
  max-width: 760px;
  margin: 28px 0 0;
  font-size: clamp(22px, 3vw, 34px);
  line-height: 1.36;
  font-weight: 800;
}

.hero-copy {
  max-width: 690px;
  margin: 18px 0 0;
  color: #5d5a55;
  font-size: 18px;
  line-height: 1.78;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 34px;
}

.belief-section {
  display: grid;
  grid-template-columns: minmax(280px, 0.92fr) minmax(0, 1.4fr);
  gap: 46px;
  padding: 88px 40px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

.belief-copy {
  max-width: 520px;
  justify-self: end;
}

.belief-copy h2,
.section-heading h2,
.decision-copy h2,
.download-inner h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.16;
  letter-spacing: 0;
}

.belief-copy p:not(.eyebrow),
.section-heading p:not(.eyebrow),
.decision-copy p,
.download-inner p {
  margin: 18px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.76;
}

.belief-points {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  width: min(850px, 100%);
}

.belief-points article,
.role-card,
.capability-grid article,
.workflow div {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: 0 12px 28px rgba(38, 35, 31, 0.06);
}

.belief-points article {
  padding: 24px;
}

.belief-points span,
.capability-grid span {
  display: block;
  margin-bottom: 28px;
  color: var(--accent);
  font-weight: 900;
}

.belief-points h3,
.role-card h3,
.capability-grid h3 {
  margin: 0;
  font-size: 23px;
  line-height: 1.3;
}

.belief-points p,
.role-card p,
.capability-grid p,
.workflow p {
  color: var(--muted);
  line-height: 1.72;
}

.section {
  padding: 88px 40px;
}

.section-heading {
  width: min(880px, 100%);
  margin: 0 auto 44px;
  text-align: center;
}

.section-heading.compact {
  margin-bottom: 34px;
}

.role-grid,
.capability-grid,
.workflow,
.screen-grid {
  width: min(1180px, 100%);
  margin: 0 auto;
}

.role-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.role-card {
  padding: 32px;
}

.role-kicker {
  display: inline-flex;
  margin-bottom: 18px;
  color: var(--blue);
  font-weight: 900;
}

.role-kicker.team {
  color: var(--violet);
}

.role-card ul {
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.role-card li {
  position: relative;
  padding-left: 20px;
  margin-top: 12px;
  color: #47443f;
}

.role-card li::before {
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 7px;
  height: 7px;
  content: "";
  border-radius: 50%;
  background: var(--accent);
}

.capability-section {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: #efede9;
}

.capability-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.capability-grid article {
  min-height: 270px;
  padding: 26px;
}

.capability-grid .highlight-card {
  border-color: rgba(169, 87, 63, 0.42);
  box-shadow: 0 18px 40px rgba(169, 87, 63, 0.11);
}

.decision-section {
  display: grid;
  grid-template-columns: minmax(300px, 0.82fr) minmax(0, 1.48fr);
  gap: 34px;
  padding: 88px 40px;
  border-bottom: 1px solid var(--line);
  background: var(--panel);
}

.decision-copy {
  max-width: 520px;
  justify-self: end;
  align-self: center;
}

.decision-gallery {
  display: grid;
  grid-template-columns: 1.35fr 0.65fr;
  gap: 16px;
  width: min(980px, 100%);
}

figure {
  margin: 0;
}

.decision-gallery figure,
.screen-grid figure {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow);
}

.decision-gallery img {
  width: 100%;
  height: 520px;
  object-fit: cover;
  object-position: left top;
}

.decision-gallery figure:nth-child(2) img {
  object-position: center top;
}

figcaption {
  padding: 14px 16px 16px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.screen-section {
  background: var(--paper);
}

.screen-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 18px;
}

.screen-grid .wide {
  grid-column: 1 / -1;
}

.screen-grid img {
  width: 100%;
  height: 460px;
  object-fit: cover;
  object-position: center top;
}

.screen-grid .wide img {
  height: 580px;
  object-position: center top;
}

.workflow-section {
  background: #f8f7f5;
  border-top: 1px solid var(--line);
}

.workflow {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--line);
}

.workflow div {
  min-height: 244px;
  padding: 28px;
  border: 0;
  border-radius: 0;
  box-shadow: none;
}

.workflow span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  margin-bottom: 34px;
  border-radius: 8px;
  color: #fff;
  background: var(--accent-dark);
  font-weight: 900;
}

.workflow strong {
  display: block;
  font-size: 20px;
}

.download-section {
  padding: 82px 40px;
  color: #fff;
  background: var(--accent-dark);
}

.download-inner {
  width: min(1180px, 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 36px;
}

.download-inner p {
  color: rgba(255, 255, 255, 0.72);
}

.download-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 240px;
}

.download-actions .secondary-button {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.24);
  background: rgba(255, 255, 255, 0.08);
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 34px;
  padding: 34px 40px;
  color: var(--muted);
  background: #fff;
}

.site-footer p {
  margin: 8px 0 0;
}

.footer-links,
.footer-meta {
  display: flex;
  gap: 18px;
  font-size: 14px;
}

.footer-meta {
  flex-direction: column;
  gap: 8px;
  text-align: right;
}

.legal-page {
  min-height: 100vh;
  background: #fff;
}

.legal-main {
  width: min(880px, 100%);
  margin: 0 auto;
  padding: 78px 32px 120px;
}

.legal-main h1 {
  font-size: clamp(34px, 5vw, 54px);
}

.legal-main h2 {
  margin-top: 42px;
  font-size: 24px;
}

.legal-main p,
.legal-main li {
  color: var(--muted);
  line-height: 1.82;
}

.legal-main ul {
  padding-left: 20px;
}

@media (max-width: 1080px) {
  .belief-section,
  .decision-section,
  .download-inner,
  .site-footer {
    grid-template-columns: 1fr;
  }

  .belief-copy,
  .decision-copy {
    max-width: 860px;
    justify-self: start;
  }

  .belief-points,
  .capability-grid,
  .workflow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .decision-gallery {
    grid-template-columns: 1fr;
  }

  .site-footer,
  .footer-meta {
    text-align: left;
  }
}

@media (max-width: 760px) {
  .site-header {
    grid-template-columns: auto auto;
    min-height: 62px;
    padding: 0 22px;
  }

  .nav-links {
    display: none;
  }

  .hero-section {
    min-height: 84vh;
    padding: 86px 24px 68px;
  }

  .hero-image {
    object-position: 58% top;
  }

  .hero-section::after {
    background:
      linear-gradient(180deg, rgba(243, 242, 239, 0.98) 0%, rgba(243, 242, 239, 0.9) 44%, rgba(243, 242, 239, 0.68) 100%);
  }

  .hero-content {
    margin-left: 0;
  }

  .belief-section,
  .section,
  .decision-section,
  .download-section {
    padding: 70px 24px;
  }

  .role-grid,
  .belief-points,
  .capability-grid,
  .workflow,
  .screen-grid {
    grid-template-columns: 1fr;
  }

  .screen-grid .wide {
    grid-column: auto;
  }

  .decision-gallery img,
  .screen-grid img,
  .screen-grid .wide img {
    height: 340px;
  }

  .download-actions,
  .hero-actions,
  .footer-links {
    flex-direction: column;
  }

  .primary-button,
  .secondary-button {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .brand span {
    display: none;
  }

  .nav-action {
    min-height: 40px;
    padding: 0 14px;
  }

  .hero-section {
    padding-top: 78px;
  }

  .role-card,
  .belief-points article,
  .capability-grid article,
  .workflow div {
    padding: 22px;
  }
}

.footer-meta .icp { color: inherit; opacity: 0.72; text-decoration: none; margin-left: 12px; }
.footer-meta .icp:hover { opacity: 1; }

.nav-links .nav-current {
  color: var(--ink);
  font-weight: 600;
}

/* ===== Motion：滚动入场 / Hero 动效 / 悬停反馈 ===== */

/* 悬停反馈（卡片与图卡） */
.belief-points article,
.role-card,
.capability-grid article,
.decision-gallery figure,
.screen-grid figure {
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.belief-points article:hover,
.role-card:hover,
.capability-grid article:hover,
.decision-gallery figure:hover,
.screen-grid figure:hover {
  transform: translateY(-3px);
  box-shadow: 0 20px 44px rgba(38, 35, 31, 0.12);
}

.primary-button,
.secondary-button,
.nav-action {
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease,
    border-color 0.15s ease;
}

.primary-button:hover,
.nav-action:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 32px rgba(169, 87, 63, 0.3);
}

.secondary-button:hover {
  transform: translateY(-1px);
  border-color: var(--soft);
  background: #fff;
}

/* 深色下载区的次要按钮是白字——悬停保持深色系，只提亮一档 */
.download-actions .secondary-button:hover {
  border-color: rgba(255, 255, 255, 0.42);
  background: rgba(255, 255, 255, 0.16);
}

.workflow div {
  transition: background 0.18s ease;
}

.workflow div:hover {
  background: #fcfbfa;
}

/* Hero 文案入场 */
@keyframes riseIn {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

.hero-content > * {
  animation: riseIn 0.7s cubic-bezier(0.2, 0.7, 0.2, 1) both;
}

.hero-content > :nth-child(2) {
  animation-delay: 0.08s;
}

.hero-content > :nth-child(3) {
  animation-delay: 0.16s;
}

.hero-content > :nth-child(4) {
  animation-delay: 0.24s;
}

.hero-content > :nth-child(5) {
  animation-delay: 0.32s;
}

/* Hero 节点连线（画板意象，纯装饰） */
.hero-nodes {
  position: absolute;
  right: clamp(24px, 6vw, 96px);
  bottom: 12%;
  width: clamp(300px, 30vw, 460px);
  height: auto;
  pointer-events: none;
  animation: hnFloat 8s ease-in-out infinite alternate;
}

@keyframes hnFloat {
  from {
    transform: translateY(0);
  }
  to {
    transform: translateY(-10px);
  }
}

.hero-nodes .hn-link {
  stroke: var(--accent);
  stroke-width: 1.6;
  opacity: 0.55;
  stroke-dasharray: 1;
  stroke-dashoffset: 1;
  animation: hnDraw 1s ease forwards;
}

.hero-nodes .hn-link:nth-child(1) {
  animation-delay: 0.3s;
}

.hero-nodes .hn-link:nth-child(2) {
  animation-delay: 0.55s;
}

.hero-nodes .hn-link:nth-child(3) {
  animation-delay: 0.8s;
}

.hero-nodes .hn-link:nth-child(4) {
  animation-delay: 1.05s;
}

@keyframes hnDraw {
  to {
    stroke-dashoffset: 0;
  }
}

.hero-nodes circle {
  fill: #fff;
  stroke: var(--accent);
  stroke-width: 2;
  opacity: 0;
  transform-box: fill-box;
  transform-origin: center;
  animation: hnPop 0.45s cubic-bezier(0.2, 0.7, 0.3, 1.4) forwards;
}

.hero-nodes circle:nth-child(1) {
  animation-delay: 0.25s;
}

.hero-nodes circle:nth-child(2) {
  animation-delay: 0.5s;
}

.hero-nodes circle:nth-child(3) {
  animation-delay: 0.75s;
}

.hero-nodes circle:nth-child(4) {
  animation-delay: 1s;
}

.hero-nodes circle:nth-child(5) {
  animation-delay: 1.25s;
}

@keyframes hnPop {
  from {
    opacity: 0;
    transform: scale(0.4);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@media (max-width: 1080px) {
  .hero-nodes {
    display: none;
  }
}

/* 滚动入场（JS 标记 .rv，进入视口加 .in） */
.rv {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease, transform 0.6s cubic-bezier(0.2, 0.7, 0.2, 1);
  transition-delay: calc(var(--rvi, 0) * 70ms);
}

.rv.in {
  opacity: 1;
  transform: none;
}

/* 系统设置"减少动态"时全部静止 */
@media (prefers-reduced-motion: reduce) {
  .hero-content > *,
  .hero-nodes,
  .hero-nodes .hn-link,
  .hero-nodes circle {
    animation: none;
  }

  .hero-nodes .hn-link {
    stroke-dashoffset: 0;
  }

  .hero-nodes circle {
    opacity: 1;
  }

  .rv {
    opacity: 1;
    transform: none;
    transition: none;
  }
}