:root {
  --bg: #f6f7f9;
  --surface: #ffffff;
  --ink: #1c2430;
  --muted: #5f6b7a;
  --line: #e2e6ec;
  --accent: #ff8a1c;
  --accent-dark: #d96800;
  --teal: #0f8f8c;
  --blue: #2f6fde;
  --soft-orange: #fff3e7;
  --soft-teal: #eaf8f7;
  --shadow: 0 16px 44px rgba(31, 45, 61, 0.12);
  --radius: 8px;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
  letter-spacing: 0;
}

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

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

a:hover {
  color: var(--accent-dark);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.nav {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 22px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  white-space: nowrap;
}

.brand-mark {
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--accent);
  border-radius: 8px;
  font-size: 18px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 14px;
  color: var(--muted);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 10px;
}

.section {
  padding: 76px 0;
}

.section.tight {
  padding: 48px 0;
}

.container {
  width: min(1180px, calc(100% - 36px));
  margin: 0 auto;
}

.hero {
  min-height: 760px;
  padding: 56px 0 48px;
  display: flex;
  align-items: center;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(500px, 0.95fr) minmax(520px, 1.05fr);
  gap: 54px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--teal);
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 14px;
}

.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  background: var(--teal);
  border-radius: 50%;
}

h1,
h2,
h3 {
  line-height: 1.18;
  margin: 0;
  overflow-wrap: anywhere;
}

h1 {
  font-size: clamp(40px, 4.2vw, 58px);
  max-width: 680px;
}

h2 {
  font-size: clamp(28px, 3.4vw, 44px);
  max-width: 16em;
}

h3 {
  font-size: 20px;
}

p {
  margin: 0;
}

.lead {
  color: var(--muted);
  font-size: 18px;
  margin-top: 22px;
  max-width: 680px;
}

.hero-actions,
.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.btn {
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  font-weight: 700;
  background: #fff;
  color: var(--ink);
}

.btn.primary {
  border-color: var(--accent);
  background: var(--accent);
  color: #fff;
}

.btn.primary:hover {
  background: var(--accent-dark);
  color: #fff;
}

.btn.ghost {
  background: transparent;
}

.hero-shot {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}

.hero-shot img {
  width: 100%;
  height: auto;
  aspect-ratio: 3378 / 1736;
  object-fit: contain;
}

.metric-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
}

.metric {
  border-left: 3px solid var(--accent);
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.68);
}

.metric strong {
  display: block;
  font-size: 22px;
}

.metric span {
  color: var(--muted);
  font-size: 13px;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: end;
  gap: 24px;
  margin-bottom: 28px;
}

.section-head p {
  color: var(--muted);
  max-width: 520px;
}

.grid-3,
.grid-4,
.grid-2 {
  display: grid;
  gap: 18px;
}

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

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

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.article-grid {
  display: grid;
  gap: 18px;
}

.article-card {
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.article-card.featured {
  border-color: rgba(255, 138, 28, 0.5);
  box-shadow: var(--shadow);
}

.article-meta {
  color: var(--accent-dark);
  font-size: 14px;
  font-weight: 800;
  margin-bottom: 10px;
}

.article-card h3 {
  margin-bottom: 10px;
}

.article-card p {
  color: var(--muted);
  max-width: 780px;
}

.text-link {
  display: inline-flex;
  margin-top: 14px;
  color: var(--accent-dark);
  font-weight: 800;
}

.topic-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.topic-list article {
  display: grid;
  gap: 6px;
  padding: 16px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.topic-list b {
  color: var(--accent-dark);
}

.topic-list span {
  font-weight: 800;
}

.topic-list small {
  color: var(--muted);
}

.article-page {
  background: #fff;
}

.article-hero {
  padding: 72px 0 44px;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

.article-hero h1 {
  max-width: 980px;
  margin-top: 12px;
}

.article-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 820px);
  gap: 42px;
  align-items: start;
  padding-top: 48px;
  padding-bottom: 72px;
}

.article-toc {
  position: sticky;
  top: 92px;
  display: grid;
  gap: 10px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.article-toc strong {
  margin-bottom: 4px;
}

.article-toc a {
  color: var(--muted);
  font-size: 14px;
}

.article-body {
  font-size: 17px;
}

.article-body section + section {
  margin-top: 44px;
}

.article-body h2 {
  font-size: 30px;
  max-width: none;
  margin-bottom: 16px;
}

.article-body h3 {
  margin-top: 22px;
  margin-bottom: 8px;
}

.article-body p {
  color: #37465a;
  margin-top: 12px;
}

.article-cta {
  margin-top: 24px;
  padding: 22px;
  border: 1px solid rgba(255, 138, 28, 0.42);
  border-radius: var(--radius);
  background: var(--soft-orange);
}

.article-cta .btn {
  margin-top: 16px;
  margin-right: 8px;
}

.card,
.feature-card,
.faq-item,
.download-panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.card {
  padding: 22px;
}

.card p,
.feature-card p,
.faq-item p,
.step p,
.plain-list li,
.timeline li {
  color: var(--muted);
}

.icon-chip {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  background: var(--soft-orange);
  color: var(--accent-dark);
  font-weight: 800;
  margin-bottom: 16px;
}

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

.step {
  padding: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.step b {
  color: var(--accent-dark);
}

.feature-card {
  position: relative;
  overflow: hidden;
}

.feature-card .copy {
  padding: 18px;
}

.feature-card img {
  aspect-ratio: 3378 / 1736;
  object-fit: cover;
  border-bottom: 1px solid var(--line);
  cursor: zoom-in;
  transition: filter 0.18s ease, transform 0.18s ease;
}

.feature-card img:hover {
  filter: saturate(1.05) contrast(1.03);
  transform: scale(1.01);
}

.feature-card::after {
  content: "点击看高清图";
  position: absolute;
  top: 10px;
  right: 10px;
  padding: 5px 8px;
  border-radius: 6px;
  background: rgba(24, 33, 45, 0.78);
  color: #fff;
  font-size: 12px;
  line-height: 1;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.18s ease;
}

.feature-card:hover::after {
  opacity: 1;
}

.updates-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(420px, 1.18fr);
  gap: 34px;
  align-items: start;
}

.updates-panel {
  display: grid;
  gap: 12px;
}

.update-item {
  display: grid;
  grid-template-columns: 112px minmax(0, 1fr);
  gap: 14px;
  padding: 16px 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.update-item time {
  color: var(--accent-dark);
  font-weight: 800;
  font-size: 14px;
}

.update-item h3 {
  font-size: 18px;
  margin-bottom: 5px;
}

.update-item p {
  color: var(--muted);
}

.image-lightbox {
  position: fixed;
  inset: 0;
  z-index: 99;
  display: none;
  padding: 28px;
  background: rgba(12, 18, 28, 0.86);
}

.image-lightbox.is-open {
  display: grid;
  place-items: center;
}

.image-lightbox__panel {
  width: min(96vw, 1380px);
  max-height: 92vh;
  display: grid;
  gap: 12px;
}

.image-lightbox__bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  color: #fff;
}

.image-lightbox__title {
  font-weight: 700;
}

.image-lightbox__actions {
  display: flex;
  gap: 10px;
}

.image-lightbox__actions a,
.image-lightbox__actions button {
  min-height: 36px;
  padding: 7px 12px;
  border: 1px solid rgba(255, 255, 255, 0.36);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  font: inherit;
  font-weight: 700;
  cursor: pointer;
}

.image-lightbox__frame {
  max-height: calc(92vh - 56px);
  overflow: auto;
  border-radius: 8px;
  background: #fff;
}

.image-lightbox__frame img {
  width: 100%;
  max-width: none;
  height: auto;
  cursor: zoom-out;
}

.band {
  background: #fff;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.compare {
  width: 100%;
  border-collapse: collapse;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.compare th,
.compare td {
  padding: 16px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.compare th {
  background: #f0f4f8;
}

.compare tr:last-child td {
  border-bottom: 0;
}

.video-wrap {
  background: #111923;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.video-wrap video {
  width: 100%;
}

.video-placeholder {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(320px, 0.8fr);
  align-items: center;
  gap: 24px;
  padding: 24px;
  background: #18212d;
}

.video-placeholder img {
  border-radius: 8px;
}

.video-placeholder h3,
.video-placeholder p {
  color: #fff;
}

.video-placeholder p {
  margin-top: 10px;
  color: #c7d0df;
}

.download-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 360px;
  gap: 22px;
  align-items: start;
}

.download-panel {
  padding: 24px;
}

.download-panel .btn {
  width: 100%;
  margin-top: 12px;
}

.plain-list {
  padding-left: 20px;
  margin: 12px 0 0;
}

.plain-list li + li {
  margin-top: 8px;
}

.faq-item {
  padding: 20px 22px;
}

.faq-item h3 {
  margin-bottom: 8px;
}

.timeline {
  padding-left: 22px;
}

.timeline li + li {
  margin-top: 14px;
}

.notice {
  padding: 18px 20px;
  border-left: 4px solid var(--teal);
  background: var(--soft-teal);
  color: #174f50;
  border-radius: var(--radius);
}

.site-footer {
  padding: 40px 0;
  background: #18212d;
  color: #d8dee8;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr repeat(3, 1fr);
  gap: 28px;
}

.site-footer a {
  display: block;
  color: #d8dee8;
  margin-top: 8px;
}

.site-footer small {
  color: #9ba8ba;
}

.footer-legal {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  align-items: center;
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid rgba(216, 222, 232, 0.14);
  color: #9ba8ba;
  font-size: 13px;
}

.footer-legal a {
  margin-top: 0;
  color: #d8dee8;
}

.mobile-toggle {
  display: none;
}

@media (max-width: 980px) {
  .hero {
    min-height: auto;
  }

  .hero-grid,
  .download-layout,
  .updates-layout,
  .video-placeholder,
  .grid-2 {
    grid-template-columns: 1fr;
  }

  .grid-3,
  .grid-4,
  .topic-list,
  .flow {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-toc {
    position: static;
  }

  .nav-links {
    display: none;
  }
}

@media (max-width: 640px) {
  .section {
    padding: 52px 0;
  }

  .nav {
    width: calc(100vw - 24px);
    max-width: calc(100vw - 24px);
    gap: 10px;
  }

  .container {
    width: calc(100vw - 36px);
    max-width: calc(100vw - 36px);
  }

  .nav-cta {
    min-width: 0;
    flex-shrink: 1;
  }

  .nav-cta .btn.ghost {
    display: none;
  }

  .nav-cta .btn.primary {
    position: relative;
    width: 64px;
    min-height: 40px;
    padding: 8px 0;
    font-size: 14px;
    white-space: nowrap;
    overflow: hidden;
    color: transparent;
  }

  .nav-cta .btn.primary::after {
    content: "下载";
    position: absolute;
    inset: 0;
    display: grid;
    place-items: center;
    color: #fff;
  }

  .grid-3,
  .grid-4,
  .topic-list,
  .flow,
  .metric-row,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .update-item {
    grid-template-columns: 1fr;
  }

  .section-head {
    display: block;
  }

  .section-head p {
    margin-top: 12px;
  }

  h1 {
    font-size: 30px;
    word-break: break-all;
  }

  .article-hero {
    padding: 56px 0 34px;
  }

  .article-hero h1 {
    width: 100%;
    max-width: 100%;
    font-size: 28px;
    word-break: break-all;
  }

  .lead {
    width: 100%;
    max-width: 100%;
    font-size: 16px;
  }

  .article-layout,
  .article-body {
    min-width: 0;
    max-width: calc(100vw - 36px);
  }

  .article-body h2 {
    font-size: 24px;
    word-break: break-all;
  }
}