:root {
  --orange: #ff6433;
  --orange-dark: #e84f20;
  --ink: #111827;
  --muted: #667085;
  --line: #eceff3;
  --soft: #fff4ee;
  --paper: #ffffff;
  --navy: #101828;
  --green: #28a745;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: #f7f8fb;
  color: var(--ink);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  height: 72px;
  display: flex;
  align-items: center;
  gap: 28px;
  padding: 0 clamp(20px, 5vw, 72px);
  background: rgba(255, 255, 255, .94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 240px;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: #fff;
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 18px;
  line-height: 1.2;
}

.brand small {
  margin-top: 2px;
  color: var(--muted);
  font-size: 12px;
}

.nav {
  flex: 1;
  display: flex;
  justify-content: center;
  gap: clamp(16px, 3vw, 36px);
  color: #344054;
  font-size: 15px;
}

.nav a:hover,
.keyword-grid a:hover {
  color: var(--orange);
}

.nav-cta,
.primary-btn,
.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border-radius: 8px;
  padding: 0 20px;
  font-weight: 800;
}

.nav-cta,
.primary-btn {
  color: #fff;
  background: var(--orange);
  box-shadow: 0 12px 24px rgba(255, 100, 51, .22);
}

.register-entry-btn {
  background: #ff7a1a;
  box-shadow: 0 12px 28px rgba(255, 122, 26, .28);
}

.secondary-btn {
  border: 1px solid rgba(255, 255, 255, .55);
  color: #fff;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(320px, .75fr);
  gap: clamp(28px, 5vw, 72px);
  align-items: center;
  min-height: 660px;
  padding: 68px clamp(20px, 6vw, 86px) 84px;
  background:
    linear-gradient(120deg, rgba(16, 24, 40, .86), rgba(255, 100, 51, .82)),
    url("/assets/share-home.jpg") center/cover;
  color: #fff;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--orange);
  font-weight: 900;
  letter-spacing: .04em;
}

.hero .eyebrow {
  color: #ffe7dc;
}

.hero h1,
.section h2,
.contact-section h2,
.topic-hero h1 {
  margin: 0;
  letter-spacing: 0;
}

.hero h1 {
  max-width: 900px;
  font-size: clamp(38px, 6vw, 68px);
  line-height: 1.08;
}

.hero-copy {
  max-width: 800px;
  margin: 26px 0 0;
  color: rgba(255, 255, 255, .86);
  font-size: 18px;
  line-height: 1.85;
}

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

.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 34px;
}

.trust-row span {
  border: 1px solid rgba(255, 255, 255, .34);
  border-radius: 999px;
  padding: 8px 13px;
  color: rgba(255, 255, 255, .92);
  background: rgba(255, 255, 255, .08);
}

.hero-panel {
  display: grid;
  gap: 18px;
}

.phone-card,
.qr-card {
  border: 1px solid rgba(255, 255, 255, .22);
  border-radius: 20px;
  background: rgba(255, 255, 255, .15);
  box-shadow: 0 28px 80px rgba(16, 24, 40, .28);
  backdrop-filter: blur(16px);
}

.phone-card {
  padding: 22px;
}

.phone-top {
  display: flex;
  align-items: center;
  gap: 12px;
}

.phone-top img {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: #fff;
}

.phone-top small,
.qr-card span {
  display: block;
  margin-top: 4px;
  color: rgba(255, 255, 255, .76);
}

.prompt-list {
  display: grid;
  gap: 16px;
  margin-top: 16px;
}

.prompt-chip,
.input-line,
.site-ai-input {
  margin-top: 16px;
  border-radius: 999px;
  padding: 12px 16px;
  background: rgba(255, 255, 255, .22);
}

.prompt-chip {
  width: 100%;
  margin-top: 0;
  border: 0;
  color: #fff;
  cursor: pointer;
  font: inherit;
  text-align: left;
}

.prompt-chip.muted {
  width: 86%;
}

.input-line,
.site-ai-input {
  background: #fff;
  color: #8a95a6;
}

.site-ai-messages {
  display: grid;
  gap: 10px;
  max-height: 220px;
  margin-top: 16px;
  overflow-y: auto;
}

.site-ai-message {
  border-radius: 14px;
  padding: 11px 13px;
  color: rgba(255, 255, 255, .92);
  font-size: 14px;
  line-height: 1.65;
  white-space: pre-wrap;
}

.site-ai-message.user {
  justify-self: end;
  max-width: 88%;
  background: rgba(17, 24, 39, .24);
}

.site-ai-message.assistant {
  justify-self: start;
  max-width: 96%;
  background: rgba(255, 255, 255, .16);
}

.site-ai-form {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 72px;
  gap: 10px;
  margin-top: 16px;
}

.site-ai-input {
  width: 100%;
  min-width: 0;
  margin-top: 0;
  border: 0;
  outline: none;
  font: inherit;
}

.site-ai-send {
  border: 0;
  border-radius: 999px;
  color: #fff;
  background: var(--orange);
  cursor: pointer;
  font-weight: 900;
}

.site-ai-send:disabled,
.site-ai-input:disabled {
  cursor: not-allowed;
  opacity: .72;
}

.site-ai-note {
  margin: 12px 0 0;
  color: rgba(255, 255, 255, .68);
  font-size: 12px;
  line-height: 1.6;
}

.qr-card {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
}

.qr-card img {
  width: 116px;
  height: 116px;
  border-radius: 10px;
  background: #fff;
}

.section,
.topic-content {
  padding: 82px clamp(20px, 6vw, 86px);
}

.section-head {
  max-width: 820px;
  margin-bottom: 34px;
}

.section h2,
.contact-section h2,
.topic-hero h1 {
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.18;
}

.section-head p:not(.eyebrow),
.split-section p,
.contact-section p,
.topic-hero p,
.topic-content p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.85;
}

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

.service-card {
  min-height: 280px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  box-shadow: 0 16px 40px rgba(16, 24, 40, .06);
}

.service-card .icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--soft);
  color: var(--orange);
  font-weight: 900;
}

.service-card h3,
.process-grid h3,
.topic-card h2 {
  margin: 18px 0 10px;
}

.service-card p,
.process-grid p,
.faq-list p,
.topic-card li {
  color: var(--muted);
  line-height: 1.8;
}

.service-card a {
  display: inline-block;
  margin-top: 12px;
  color: var(--orange);
  font-weight: 800;
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, .88fr) minmax(320px, 1fr);
  gap: 44px;
  align-items: center;
  background: #fff;
}

.check-list {
  display: grid;
  gap: 14px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 28px;
  color: #344054;
  line-height: 1.75;
}

.check-list li::before {
  position: absolute;
  left: 0;
  top: 2px;
  content: "✓";
  color: var(--green);
  font-weight: 900;
}

.tool-preview {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.tool-preview img {
  width: 100%;
  border-radius: 8px;
  box-shadow: 0 18px 40px rgba(16, 24, 40, .12);
}

.process-band {
  color: #fff;
  background: var(--navy);
}

.process-band .eyebrow,
.process-band .section-head p:not(.eyebrow) {
  color: #ffb69c;
}

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

.process-grid div {
  padding: 26px;
  border: 1px solid rgba(255, 255, 255, .12);
  border-radius: 8px;
  background: rgba(255, 255, 255, .05);
}

.process-grid strong {
  color: #ffb69c;
  font-size: 32px;
}

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

.keyword-grid a {
  padding: 18px;
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
  font-weight: 800;
}

.faq-section {
  background: #fff;
}

.faq-list {
  display: grid;
  gap: 12px;
  max-width: 920px;
}

.faq-list details {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px 20px;
  background: #fff;
}

.faq-list summary {
  cursor: pointer;
  font-weight: 900;
}

.contact-section {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 180px;
  gap: 32px;
  align-items: center;
  margin: 0 clamp(20px, 6vw, 86px) 72px;
  padding: 38px;
  border-radius: 12px;
  color: #fff;
  background: linear-gradient(135deg, var(--orange), #ff865d 60%, #111827 60%);
}

.contact-section .eyebrow,
.contact-section p {
  color: rgba(255, 255, 255, .86);
}

.contact-section img {
  width: 180px;
  height: 180px;
  border: 10px solid #fff;
  border-radius: 16px;
}

.footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 34px clamp(20px, 6vw, 86px);
  border-top: 1px solid var(--line);
  background: #fff;
  color: var(--muted);
}

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

.footer nav {
  display: flex;
  gap: 20px;
}

.topic-hero {
  padding: 74px clamp(20px, 6vw, 86px);
  color: #fff;
  background: linear-gradient(135deg, #111827, #ff6433);
}

.topic-hero p {
  max-width: 760px;
  color: rgba(255,255,255,.86);
}

.topic-content {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 26px;
}

.topic-card,
.topic-aside {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 16px 40px rgba(16, 24, 40, .06);
}

.topic-card {
  padding: 32px;
}

.topic-card + .topic-card {
  margin-top: 18px;
}

.topic-card ul,
.topic-card ol {
  padding-left: 22px;
}

.topic-aside {
  align-self: start;
  position: sticky;
  top: 92px;
  padding: 22px;
}

.topic-aside img {
  width: 100%;
  border-radius: 10px;
}

.topic-aside .primary-btn {
  width: 100%;
  margin-top: 16px;
}

.nav a[aria-current="page"] {
  color: var(--orange);
  font-weight: 800;
}

.knowledge-intro {
  padding: 68px clamp(20px, 6vw, 86px) 64px;
  border-bottom: 1px solid var(--line);
  background: #fff;
}

.knowledge-breadcrumb {
  display: flex;
  gap: 8px;
  margin-bottom: 34px;
  color: var(--muted);
  font-size: 14px;
}

.knowledge-breadcrumb a:hover {
  color: var(--orange);
}

.knowledge-intro h1 {
  max-width: 900px;
  margin: 0;
  font-size: clamp(38px, 5vw, 60px);
  line-height: 1.12;
}

.knowledge-intro-copy {
  max-width: 920px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.85;
}

.knowledge-scope {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 30px;
}

.knowledge-scope span {
  border: 1px solid #ffd7c7;
  border-radius: 999px;
  padding: 8px 13px;
  color: #9a3412;
  background: var(--soft);
  font-weight: 700;
}

.knowledge-section {
  padding: 76px clamp(20px, 6vw, 86px);
}

.knowledge-section .section-head h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.2;
}

.knowledge-section .section-head p:not(.eyebrow) {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.85;
}

.knowledge-value-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.knowledge-value-grid article {
  min-width: 0;
  padding: 30px;
}

.knowledge-value-grid article + article {
  border-left: 1px solid var(--line);
}

.knowledge-value-grid strong {
  color: var(--orange);
  font-size: 13px;
  text-transform: uppercase;
}

.knowledge-value-grid h2 {
  margin: 10px 0;
  font-size: 22px;
}

.knowledge-value-grid p {
  margin: 0;
  color: var(--muted);
  line-height: 1.75;
}

.knowledge-categories {
  background: #fff;
}

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

.knowledge-card {
  min-width: 0;
  padding: 28px;
  border: 1px solid var(--line);
  border-top: 4px solid var(--orange);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 14px 34px rgba(16, 24, 40, .05);
}

.knowledge-card-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
}

.knowledge-card-number {
  flex: 0 0 auto;
  color: var(--orange);
  font-size: 14px;
  font-weight: 900;
}

.knowledge-card h3 {
  margin: 0;
  font-size: 23px;
}

.knowledge-card > p {
  margin: 16px 0;
  color: #344054;
  font-size: 16px;
  line-height: 1.75;
}

.knowledge-card ul {
  display: grid;
  gap: 9px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.knowledge-card li {
  position: relative;
  padding-left: 19px;
  color: var(--muted);
  line-height: 1.65;
}

.knowledge-card li::before {
  position: absolute;
  top: .72em;
  left: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--orange);
  content: "";
}

.knowledge-card-link {
  display: inline-flex;
  margin-top: 16px;
  color: #e54b22;
  font-weight: 700;
  text-decoration: none;
}

.knowledge-card-link:hover {
  text-decoration: underline;
}

.content-updated {
  margin-top: 14px;
  color: #667085;
  font-size: 14px;
}

.topic-related {
  max-width: 1180px;
  margin: 0 auto;
  padding: 8px 24px 72px;
}

.topic-related h2 {
  margin: 0 0 20px;
  color: #172033;
  font-size: 26px;
}

.topic-card h3 {
  margin: 22px 0 8px;
  color: #172033;
  font-size: 18px;
}

.knowledge-boundary {
  padding: 68px clamp(20px, 6vw, 86px);
  color: #fff;
  background: var(--navy);
}

.knowledge-boundary h2 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(30px, 4vw, 44px);
  line-height: 1.2;
}

.knowledge-boundary-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
  margin-top: 34px;
}

.knowledge-boundary-grid div {
  border-top: 1px solid rgba(255, 255, 255, .24);
  padding-top: 20px;
}

.knowledge-boundary-grid strong {
  color: #ffb69c;
  font-size: 18px;
}

.knowledge-boundary-grid p {
  margin: 10px 0 0;
  color: rgba(255, 255, 255, .72);
  line-height: 1.75;
}

.knowledge-contact {
  margin-top: 72px;
}

#knowledge-categories,
#knowledge-boundary,
#wechat {
  scroll-margin-top: 140px;
}

.wechat-qr-block {
  margin: 0;
  text-align: center;
}

.wechat-qr-block figcaption {
  margin-top: 8px;
  color: rgba(255, 255, 255, .82);
  font-size: 13px;
}

.company-profile-page {
  background: #f7f8fb;
}

.company-profile-header .brand {
  cursor: default;
}

.company-profile-intro {
  background:
    radial-gradient(circle at 82% 22%, rgba(255, 100, 51, .11), transparent 30%),
    #fff;
}

#overview,
#history,
#business,
#capabilities,
#culture {
  scroll-margin-top: 104px;
}

.company-timeline {
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
  list-style: none;
}

.company-timeline li {
  display: grid;
  grid-template-columns: 190px minmax(0, 1fr);
  gap: 30px;
  align-items: start;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.company-timeline time {
  color: var(--orange-dark);
  font-size: 17px;
  font-weight: 900;
  line-height: 1.7;
}

.company-timeline p {
  margin: 0;
  color: #344054;
  font-size: 17px;
  line-height: 1.8;
}

.company-business-grid .knowledge-card {
  min-height: 0;
}

.company-business-grid .knowledge-card ul {
  margin-bottom: 0;
}

.company-capabilities-section .section-head p:not(.eyebrow) {
  color: rgba(255, 255, 255, .72);
  font-size: 17px;
  line-height: 1.85;
}

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

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

.company-culture-grid article {
  min-width: 0;
  padding: 28px;
  border: 1px solid var(--line);
  border-top: 4px solid var(--orange);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 14px 34px rgba(16, 24, 40, .05);
}

.company-culture-grid strong {
  color: var(--orange-dark);
  font-size: 16px;
}

.company-culture-grid p {
  margin: 12px 0 0;
  color: #344054;
  line-height: 1.8;
}

.company-profile-footer > p {
  max-width: 620px;
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
  text-align: right;
}

@media (max-width: 980px) {
  .site-header {
    height: auto;
    align-items: flex-start;
    flex-wrap: wrap;
    padding-top: 14px;
    padding-bottom: 14px;
  }

  .nav {
    order: 3;
    flex: 0 0 100%;
    width: 100%;
    justify-content: flex-start;
    overflow-x: auto;
    padding-bottom: 2px;
    white-space: nowrap;
    scrollbar-width: none;
  }

  .nav::-webkit-scrollbar {
    display: none;
  }

  .hero,
  .split-section,
  .topic-content,
  .contact-section {
    grid-template-columns: 1fr;
  }

  .service-grid,
  .process-grid,
  .keyword-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .knowledge-value-grid,
  .knowledge-boundary-grid,
  .company-capability-grid {
    grid-template-columns: 1fr;
  }

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

  .knowledge-value-grid article + article {
    border-top: 1px solid var(--line);
    border-left: 0;
  }

  .contact-section {
    background: linear-gradient(135deg, var(--orange), #111827);
  }
}

@media (max-width: 640px) {
  .brand {
    min-width: 0;
  }

  .nav-cta {
    display: none;
  }

  .hero {
    min-height: 0;
    padding-top: 44px;
  }

  .hero h1 {
    font-size: 36px;
  }

  .service-grid,
  .process-grid,
  .keyword-grid,
  .tool-preview,
  .knowledge-grid {
    grid-template-columns: 1fr;
  }

  .knowledge-intro {
    padding-top: 44px;
  }

  .knowledge-section,
  .knowledge-boundary {
    padding-top: 54px;
    padding-bottom: 54px;
  }

  .section,
  .topic-content {
    padding-top: 54px;
    padding-bottom: 54px;
  }

  .company-timeline li {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .company-culture-grid {
    grid-template-columns: 1fr;
  }

  .footer {
    flex-direction: column;
  }

  .company-profile-footer > p {
    text-align: left;
  }
}