/* 黑白视频官网 —— 大陆企业官网标准版式 */
:root {
  --brand: #e60012;
  --brand-dark: #c3000f;
  --ink: #1a1a1a;
  --mute: #777;
  --line: #e8e8e8;
  --bg: #ffffff;
  --gray: #f6f7f9;
  --dark: #141518;
  --w: 1200px;
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  -webkit-text-size-adjust: 100%;
}
body {
  font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", system-ui, sans-serif;
  color: var(--ink);
  background: var(--bg);
  font-size: 15px;
  line-height: 1.8;
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
a {
  color: inherit;
  text-decoration: none;
}
ul {
  list-style: none;
}
:focus-visible {
  outline: 3px solid var(--brand);
  outline-offset: 2px;
}
.skip-link {
  position: absolute;
  left: -9999px;
  background: var(--dark);
  color: #fff;
  padding: 10px 16px;
  z-index: 999;
}
.skip-link:focus {
  left: 8px;
  top: 8px;
}
.w {
  max-width: var(--w);
  margin: 0 auto;
  padding: 0 16px;
}

/* ── 顶部通栏 ── */
.topbar {
  background: var(--dark);
  color: #9aa0a6;
  font-size: 13px;
}
.topbar-in {
  display: flex;
  justify-content: space-between;
  align-items: center;
  min-height: 36px;
  gap: 12px;
}
.topbar a {
  color: #9aa0a6;
  padding: 6px 0;
}
.topbar a:hover {
  color: #fff;
}
.topbar-links a {
  margin-left: 18px;
}

/* ── 主头部 ── */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 6px rgba(0, 0, 0, 0.04);
}
.header-in {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 84px;
  gap: 16px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo-mark {
  display: inline-flex;
  font-weight: 800;
  font-size: 17px;
  line-height: 1;
  border-radius: 6px;
  overflow: hidden;
  border: 2px solid var(--ink);
  flex: none;
}
.logo-mark b {
  background: var(--ink);
  color: #fff;
  padding: 8px 9px;
}
.logo-mark i {
  font-style: normal;
  background: #fff;
  color: var(--ink);
  padding: 8px 9px;
}
.logo-text .name {
  font-size: 24px;
  font-weight: 800;
  letter-spacing: 0.04em;
  line-height: 1.2;
}
.logo-text .slogan {
  font-size: 12px;
  color: var(--mute);
  letter-spacing: 0.06em;
}
.main-nav > ul {
  display: flex;
}
.main-nav > ul > li {
  position: relative;
}
.main-nav > ul > li > a {
  display: flex;
  align-items: center;
  height: 84px;
  padding: 0 22px;
  font-size: 16px;
  position: relative;
}
.main-nav > ul > li > a:hover {
  color: var(--brand);
}
.main-nav > ul > li > a:is([aria-current="page"], [data-nav-active="true"]) {
  color: var(--brand);
  font-weight: 700;
}
.main-nav > ul > li > a:is([aria-current="page"], [data-nav-active="true"])::after {
  content: "";
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 0;
  height: 3px;
  background: var(--brand);
}
.has-sub > a::before {
  content: "";
  position: absolute;
  right: 8px;
  top: 50%;
  width: 6px;
  height: 6px;
  border-right: 1.5px solid #aaa;
  border-bottom: 1.5px solid #aaa;
  transform: translateY(-70%) rotate(45deg);
}
.sub-nav {
  display: none;
  position: absolute;
  top: 84px;
  left: 50%;
  transform: translateX(-50%);
  background: #fff;
  min-width: 150px;
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
  border-top: 3px solid var(--brand);
  z-index: 110;
}
/* Escape 后关闭整个子菜单，包括键盘焦点与悬停命中区。 */
.has-sub[data-submenu-state="closed"] > .sub-nav { display: none !important; }

.sub-nav a {
  display: block;
  padding: 12px 20px;
  font-size: 14px;
  text-align: center;
  border-bottom: 1px solid #f2f2f2;
}
.sub-nav a:hover {
  background: var(--brand);
  color: #fff;
}
.main-nav li:hover > .sub-nav,
.main-nav li:focus-within > .sub-nav,
.main-nav .has-sub.on > .sub-nav {
  display: block;
}
.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 6px;
  min-width: 44px;
  min-height: 44px;
  font-size: 14px;
  cursor: pointer;
}

/* ── 首页轮播 ── */
.banner {
  position: relative;
  height: 520px;
  overflow: hidden;
  background: var(--dark);
}
.slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.6s ease;
  pointer-events: none;
}
.slide.on {
  opacity: 1;
  pointer-events: auto;
}
.slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.slide-text {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
}
.slide-text .w {
  width: 100%;
}
.slide-text h1,
.slide-text .bt {
  font-size: 44px;
  font-weight: 800;
  color: #fff;
  line-height: 1.3;
  max-width: 22em;
  text-shadow: 0 2px 14px rgba(0, 0, 0, 0.4);
}
.slide-text .bt em {
  font-style: normal;
  color: var(--brand);
}
.slide-text h1 em {
  font-style: normal;
  color: #ff8a93;
}
.slide-text p {
  color: #e6e6e6;
  font-size: 18px;
  margin-top: 16px;
  max-width: 34em;
  text-shadow: 0 1px 8px rgba(0, 0, 0, 0.4);
}
.slide-actions {
  margin-top: 30px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.dots {
  position: absolute;
  bottom: 22px;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  gap: 10px;
  z-index: 5;
}
.dots button {
  width: 34px;
  height: 5px;
  border: 0;
  border-radius: 3px;
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  padding: 0;
}
.dots button[aria-current="true"] {
  background: var(--brand);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 32px;
  font-size: 16px;
  border-radius: 4px;
  transition: all 0.2s;
  cursor: pointer;
  border: 1px solid transparent;
}
.btn-red {
  background: var(--brand);
  color: #fff;
}
.btn-red:hover {
  background: var(--brand-dark);
}
.btn-line {
  border-color: #fff;
  color: #fff;
}
.btn-line:hover {
  background: #fff;
  color: var(--ink);
}
.btn-dark {
  background: var(--ink);
  color: #fff;
}
.btn-dark:hover {
  background: #000;
}
.btn-hollow {
  border-color: var(--brand);
  color: var(--brand);
}
.btn-hollow:hover {
  background: var(--brand);
  color: #fff;
}

/* ── 栏目标题（居中+英文副标+红线） ── */
.sec {
  padding: 70px 0;
}
.sec-gray {
  background: var(--gray);
}
.sec-title {
  text-align: center;
  margin-bottom: 44px;
}
.sec-title h2 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: 0.04em;
}
.sec-title .en {
  display: block;
  color: #bbb;
  font-size: 13px;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  margin-top: 8px;
}
.sec-title .bar {
  display: block;
  width: 46px;
  height: 3px;
  background: var(--brand);
  margin: 16px auto 0;
}
.sec-title .desc {
  color: var(--mute);
  margin-top: 14px;
  font-size: 15px;
}

/* 关于我们：左图右文 */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1.15fr;
  gap: 52px;
  align-items: center;
}
.about-grid .pic {
  border-radius: 6px;
  overflow: hidden;
  box-shadow: 0 14px 40px rgba(0, 0, 0, 0.1);
}
.about-grid .pic img {
  width: 100%;
  height: auto;
}
.about-grid h3 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
}
.about-grid h3 span {
  color: var(--brand);
}
.about-grid p {
  color: #555;
  margin-bottom: 14px;
  text-align: justify;
}
.about-nums {
  display: flex;
  gap: 36px;
  margin: 22px 0 26px;
  flex-wrap: wrap;
}
.about-nums .n {
  border-left: 3px solid var(--brand);
  padding-left: 14px;
}
.about-nums .n b {
  display: block;
  font-size: 17px;
}
.about-nums .n span {
  color: var(--mute);
  font-size: 13px;
}

/* 产品中心：选项卡+卡片 */
.tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}
.tabs button {
  border: 1px solid var(--line);
  background: #fff;
  padding: 10px 30px;
  font-size: 15px;
  border-radius: 4px;
  cursor: pointer;
  min-height: 44px;
}
.tabs button[aria-selected="true"] {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}
.p-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.p-card {
  background: #fff;
  border: 1px solid var(--line);
  transition: all 0.25s;
  display: flex;
  flex-direction: column;
}
.p-card > a {
  display: block;
}
.p-card > a img {
  width: 100%;
  height: auto;
}
.p-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.1);
  border-color: transparent;
}
.p-card .p-body {
  padding: 22px 22px 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.p-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}
.p-card:hover h3 {
  color: var(--brand);
}
.p-card p {
  color: var(--mute);
  font-size: 14px;
  flex: 1;
}
.p-card .p-more {
  margin-top: 16px;
  color: var(--brand);
  font-size: 14px;
}
.p-card .p-cat {
  font-size: 12px;
  color: #aaa;
  margin-bottom: 6px;
}
.sec-more {
  text-align: center;
  margin-top: 40px;
}

/* 我们的优势（深色） */
.sec-dark {
  background: var(--dark) linear-gradient(135deg, #141518 60%, #232019);
  color: #fff;
  padding: 74px 0;
}
.sec-dark .sec-title h2 {
  color: #fff;
}
.adv-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.adv-item {
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.09);
  padding: 34px 26px;
  text-align: center;
  transition: all 0.25s;
}
.adv-item:hover {
  background: var(--brand);
  transform: translateY(-6px);
}
.adv-item .ico {
  width: 58px;
  height: 58px;
  margin: 0 auto 18px;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}
.adv-item h3 {
  font-size: 18px;
  margin-bottom: 10px;
}
.adv-item p {
  color: #c9c9c9;
  font-size: 14px;
}
.adv-item:hover p {
  color: #ffe0e2;
}

.main-col .adv-item {
  background: var(--gray);
  border-color: var(--line);
  text-align: left;
}

.main-col .adv-item p {
  color: var(--mute);
}

.main-col .adv-item:hover {
  background: #fff;
  border-color: var(--brand);
  transform: translateY(-3px);
}

.main-col .adv-item:hover p {
  color: var(--ink);
}

/* 使用场景 */
.scene-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.scene {
  background: #fff;
  border-top: 3px solid var(--brand);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.05);
  padding: 26px 22px;
}
.scene h3 {
  font-size: 17px;
  margin-bottom: 8px;
}
.scene h3::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--brand);
  margin-right: 8px;
  vertical-align: 2px;
}
.scene p {
  color: var(--mute);
  font-size: 14px;
}

/* 通栏引导 */
.cta {
  background: linear-gradient(120deg, var(--brand), #8f000b);
  color: #fff;
  padding: 52px 0;
}
.cta-in {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.cta h2 {
  font-size: 26px;
  font-weight: 800;
}
.cta p {
  margin-top: 8px;
  color: #ffd9db;
  max-width: 40em;
}
.cta .btn-line:hover {
  color: var(--brand);
}

/* 首页FAQ */
.faq3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.faq {
  background: #fff;
  border: 1px solid var(--line);
  padding: 22px;
}
.faq h3 {
  font-size: 16px;
  margin-bottom: 10px;
}
.faq h3::before {
  content: "问";
  background: var(--brand);
  color: #fff;
  font-size: 12px;
  border-radius: 3px;
  padding: 2px 6px;
  margin-right: 8px;
  vertical-align: 2px;
}
.faq p {
  color: var(--mute);
  font-size: 14px;
}
.faq p::before {
  content: "答";
  background: var(--ink);
  color: #fff;
  font-size: 12px;
  border-radius: 3px;
  padding: 2px 6px;
  margin-right: 8px;
}

/* ── 内页banner + 当前位置 ── */
.page-banner {
  background: var(--dark) linear-gradient(120deg, #141518, #2a2b31 55%, #3a2326);
  color: #fff;
  padding: 64px 0;
  position: relative;
  overflow: hidden;
}
.page-banner::after {
  content: "";
  position: absolute;
  right: -60px;
  top: -60px;
  width: 280px;
  height: 280px;
  border: 44px solid rgba(230, 0, 18, 0.16);
  border-radius: 50%;
}
.page-banner h1 {
  font-size: 34px;
  font-weight: 800;
  letter-spacing: 0.05em;
}
.page-banner .sub {
  color: #b9b9b9;
  margin-top: 10px;
  max-width: 44em;
}
.location {
  background: var(--gray);
  border-bottom: 1px solid var(--line);
  font-size: 13px;
  color: var(--mute);
}
.location .w {
  display: flex;
  align-items: center;
  min-height: 44px;
}
.location .loc-label {
  flex: none;
  white-space: nowrap;
}
.location ol {
  display: flex;
  flex: 1;
  min-width: 0;
  list-style: none;
  gap: 4px;
}
.location li {
  flex: none;
  white-space: nowrap;
}
.location li:last-child {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
}
.location li + li::before {
  content: ">";
  margin: 0 6px;
  color: #bbb;
}
.location a:hover {
  color: var(--brand);
}
.location [aria-current] {
  color: var(--brand);
}
.location .loc-label::before {
  content: "📍";
  margin-right: 6px;
}

/* ── 内页布局：左栏+右内容 ── */
.layout {
  display: grid;
  grid-template-columns: 264px 1fr;
  gap: 36px;
  padding: 52px 0;
}
.side-box {
  border: 1px solid var(--line);
  margin-bottom: 22px;
  background: #fff;
}
.side-box .side-hd {
  background: var(--dark);
  color: #fff;
  padding: 16px 20px;
  font-size: 17px;
  font-weight: 700;
  border-left: 4px solid var(--brand);
}
.side-box ul li a {
  display: block;
  padding: 13px 20px;
  border-bottom: 1px solid #f1f1f1;
  font-size: 14px;
  position: relative;
}
.side-box ul li a::after {
  content: ">";
  position: absolute;
  right: 16px;
  color: #ccc;
}
.side-box ul li a:hover {
  color: var(--brand);
  padding-left: 26px;
}
.side-box ul li a[aria-current="page"] {
  color: var(--brand);
  font-weight: 700;
  border-left: 3px solid var(--brand);
  background: #fff5f5;
}
.side-cta {
  background: var(--dark);
  color: #fff;
  padding: 26px 20px;
  text-align: center;
}
.side-cta h3 {
  font-size: 17px;
  margin-bottom: 8px;
}
.side-cta p {
  color: #b5b5b5;
  font-size: 13px;
  margin-bottom: 16px;
}
.main-col {
  min-width: 0;
}
.main-col .m-hd {
  font-size: 22px;
  font-weight: 800;
  border-bottom: 1px solid var(--line);
  padding-bottom: 14px;
  margin-bottom: 24px;
  position: relative;
}
.main-col .m-hd::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 64px;
  height: 3px;
  background: var(--brand);
}

/* 正文 */
.prose {
  max-width: 100%;
}
.prose h2 {
  font-size: 21px;
  font-weight: 700;
  margin: 34px 0 14px;
  padding-left: 12px;
  border-left: 4px solid var(--brand);
}
.prose h2:first-child {
  margin-top: 0;
}
.prose h3 {
  font-size: 17px;
  font-weight: 700;
  margin: 22px 0 8px;
}
.prose p {
  margin-bottom: 14px;
  color: #444;
  text-align: justify;
}
.prose ul,
.prose ol {
  margin: 0 0 16px 1.6em;
}
.prose li {
  margin-bottom: 6px;
  color: #444;
}
.prose a {
  color: var(--brand);
}
.prose .figure {
  margin: 20px 0;
  border: 1px solid var(--line);
}
.article-meta {
  color: #999;
  font-size: 13px;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line);
}
.pn {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 36px;
}
.pn a {
  border: 1px solid var(--line);
  padding: 14px 18px;
  font-size: 14px;
  background: var(--gray);
}
.pn a:hover {
  color: var(--brand);
  border-color: var(--brand);
}
.pn a[rel="next"] {
  grid-column: -2 / -1;
}
.pn .dir {
  display: block;
  font-size: 12px;
  color: #aaa;
  margin-bottom: 2px;
}
.next-steps {
  margin-top: 36px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

/* 帮助/空态/搜索/地图 */
.faq-item {
  border: 1px solid var(--line);
  padding: 18px 20px;
  margin-bottom: 14px;
  background: #fff;
}
.faq-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}
.faq-item h3::before {
  content: "Q";
  background: var(--brand);
  color: #fff;
  font-size: 12px;
  border-radius: 3px;
  padding: 2px 7px;
  margin-right: 8px;
}
.faq-item p {
  color: #555;
  font-size: 14px;
}
.faq-item p::before {
  content: "A";
  background: var(--ink);
  color: #fff;
  font-size: 12px;
  border-radius: 3px;
  padding: 2px 7px;
  margin-right: 8px;
}
.empty {
  border: 1px dashed #d9d9d9;
  background: var(--gray);
  padding: 52px 24px;
  text-align: center;
  color: var(--mute);
}
.empty strong {
  display: block;
  color: var(--ink);
  font-size: 18px;
  margin-bottom: 8px;
}
.search-form {
  display: flex;
  max-width: 560px;
  margin: 6px 0 30px;
}
.search-form input {
  flex: 1;
  border: 2px solid var(--brand);
  border-right: 0;
  padding: 11px 16px;
  font-size: 15px;
  min-height: 48px;
  border-radius: 4px 0 0 4px;
}
.search-form button {
  border: 0;
  background: var(--brand);
  color: #fff;
  padding: 0 26px;
  font-size: 15px;
  cursor: pointer;
  border-radius: 0 4px 4px 0;
}
.result {
  padding: 16px 0;
  border-bottom: 1px dashed var(--line);
}
.result h3 {
  font-size: 16px;
}
.result h3 a:hover {
  color: var(--brand);
}
.result p {
  color: var(--mute);
  font-size: 13px;
  margin-top: 4px;
}
.map-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 34px;
}
.map-cols h2 {
  font-size: 17px;
  border-left: 4px solid var(--brand);
  padding-left: 10px;
  margin-bottom: 14px;
}
.map-cols li {
  padding: 7px 0;
  border-bottom: 1px dashed #eee;
}
.map-cols a:hover {
  color: var(--brand);
}

/* ── 页脚 ── */
.site-footer {
  background: #17181c;
  color: #9aa0a6;
  font-size: 14px;
}
.footer-in {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 36px;
  padding: 56px 0 40px;
}
.site-footer h2 {
  color: #fff;
  font-size: 16px;
  margin-bottom: 16px;
  font-weight: 700;
}
.site-footer li {
  margin-bottom: 9px;
}
.site-footer a:hover {
  color: #fff;
}
.f-brand .logo-text .name {
  color: #fff;
  font-size: 20px;
}
.f-brand p {
  margin-top: 14px;
  max-width: 24em;
  font-size: 13px;
  line-height: 1.9;
}
.f-contact p {
  margin-bottom: 10px;
  font-size: 13px;
}
.footer-bottom {
  border-top: 1px solid #26272c;
  padding: 16px 0;
  font-size: 13px;
  color: #6f7377;
}
.footer-bottom .w {
  display: flex;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
}
.footer-bottom a {
  color: #6f7377;
}
.footer-bottom a:hover {
  color: #fff;
}
.to-top {
  position: fixed;
  right: 16px;
  bottom: 16px;
  width: 46px;
  height: 46px;
  background: var(--brand);
  color: #fff;
  border: 0;
  border-radius: 4px;
  font-size: 18px;
  cursor: pointer;
  display: none;
  z-index: 120;
}
.to-top.show {
  display: block;
}

/* ── 响应式 ── */
@media (max-width: 1024px) {
  .adv-grid,
  .scene-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .p-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-in {
    grid-template-columns: 1fr 1fr;
  }
  .main-nav > ul > li > a {
    padding: 0 14px;
  }
}
@media (max-width: 860px) {
  .topbar-welcome {
    display: none;
  }
  .nav-toggle {
    display: block;
  }
  .main-nav {
    display: none;
    position: absolute;
    left: 0;
    right: 0;
    top: 84px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    max-height: 70vh;
    overflow: auto;
  }
  .main-nav.open {
    display: block;
  }
  .main-nav > ul {
    flex-direction: column;
  }
  .main-nav > ul > li > a {
    height: auto;
    min-height: 48px;
    padding: 12px 20px;
  }
  .main-nav > ul > li > a:is([aria-current="page"], [data-nav-active="true"])::after {
    display: none;
  }
  .has-sub > a::before {
    display: none;
  }
  .sub-nav {
    display: block;
    position: static;
    transform: none;
    box-shadow: none;
    border-top: 0;
    background: var(--gray);
  }
  .sub-nav a {
    text-align: left;
    padding-left: 36px;
  }
  .banner {
    height: 420px;
  }
  .slide-text h1,
  .slide-text .bt {
    font-size: 28px;
  }
  .about-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .layout {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 0;
  }
  .p-grid,
  .faq3 {
    grid-template-columns: 1fr;
  }
  .pn {
    grid-template-columns: 1fr;
  }
  .sec {
    padding: 48px 0;
  }
  .page-banner {
    padding: 44px 0;
  }
  .page-banner h1 {
    font-size: 26px;
  }
  .map-cols {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 479px) {
  .adv-grid,
  .scene-grid {
    grid-template-columns: 1fr;
  }
  .footer-in {
    grid-template-columns: 1fr;
  }
  .logo-text .slogan {
    display: none;
  }
  .slide-text p {
    font-size: 15px;
  }
}
@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
}

/* 顶栏搜索 */
.topbar-search {
  display: flex;
  align-items: center;
}
.topbar-search input {
  background: #26272c;
  border: 1px solid #34353b;
  color: #ddd;
  padding: 5px 10px;
  font-size: 12px;
  border-radius: 3px 0 0 3px;
  width: 150px;
}
.topbar-search button {
  background: var(--brand);
  border: 0;
  color: #fff;
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 0 3px 3px 0;
  cursor: pointer;
}
.topbar-right {
  display: flex;
  align-items: center;
  gap: 16px;
}
[data-mobile-search] { display: none; }
@media (max-width: 640px) {
  .header-in [data-mobile-search] {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    flex: 0 0 44px;
    margin-left: auto;
    color: var(--brand);
  }
  .header-in [data-mobile-search]:focus-visible { outline: 2px solid var(--brand); outline-offset: 2px; }
  .topbar-search {
    display: none;
  }
}

/* 下载卡片 */
.dl-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
  border: 1px solid var(--line);
  border-top: 3px solid var(--brand);
  background: var(--gray);
  padding: 26px 28px;
  margin: 6px 0 10px;
}
.dl-info h3 {
  font-size: 19px;
  margin-bottom: 10px;
}
.dl-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
  margin: 0 !important;
  list-style: none;
}
.dl-meta li {
  color: #555;
  font-size: 14px;
  margin: 0 !important;
}
.dl-act {
  text-align: center;
}
.dl-tip {
  font-size: 12px;
  color: #999;
  margin-top: 8px;
}

/* 联系方式 */
.c-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-bottom: 10px;
}
.c-item {
  border: 1px solid var(--line);
  border-left: 3px solid var(--brand);
  padding: 18px 20px;
  background: #fff;
}
.c-item h3 {
  font-size: 14px;
  color: #999;
  font-weight: 400;
  margin-bottom: 6px;
}
.c-item .c-big {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--ink);
}
.c-item p {
  font-size: 13px;
  color: #888;
  margin: 0;
}

/* 留言表单 */
.msg-form {
  border: 1px solid var(--line);
  background: var(--gray);
  padding: 24px;
  max-width: 680px;
}
.msg-form label {
  display: block;
  font-size: 14px;
  color: #555;
  margin-bottom: 14px;
}
.mf-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.msg-form input,
.msg-form textarea {
  display: block;
  width: 100%;
  margin-top: 6px;
  border: 1px solid #ddd;
  padding: 11px 12px;
  font-size: 14px;
  font-family: inherit;
  background: #fff;
  border-radius: 3px;
  min-height: 44px;
}
.msg-form input:focus,
.msg-form textarea:focus {
  border-color: var(--brand);
  outline: none;
}
.msg-ok {
  color: #0a8a2a;
  font-size: 14px;
  margin-top: 12px;
}
@media (max-width: 640px) {
  .mf-row,
  .c-grid {
    grid-template-columns: 1fr;
  }
  .dl-card {
    justify-content: center;
    text-align: center;
  }
}


/* ==========================================================================
   触控目标：移动端主要可点击元素命中区不小于 44x44
   视觉尺寸保持不变，通过内边距或伪元素扩大命中区；
   被扩大的元素在各自容器内没有相邻可点击元素，不会互相覆盖。
   ========================================================================== */

.topbar-links a,
.logo,
.f-brand .logo,
.location ol li a,
.article-meta a,
.p-card .p-body h3 a,
.p-card .p-more,
.side-box ul li a,
.footer-in a,
.footer-bottom a,
.article-nav a,
.next-steps a,
.m-hd a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

/* 短文字链接（两到四个字）横向也要够 44 */
.location ol li a,
.footer-bottom a,
.footer-in a,
.side-box ul li a {
  min-width: 44px;
  padding-inline: 4px;
}

/* 页脚栏目列表本身就是块级，撑满即可 */
.footer-in ul li a {
  width: 100%;
  padding-inline: 0;
}

/* 轮播指示点：视觉仍是细条，命中区扩到 44x44 */
.dots button {
  position: relative;
}

.dots button::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  width: 44px;
  height: 44px;
  transform: translate(-50%, -50%);
}

/* 顶部功能条随链接高度一并加高 */
.topbar-links {
  align-items: center;
}


/* 正文段落内的内联链接保持行内节奏，不强行撑到 44px；
   《模版要求》第 19 节将正文链接与主要触控目标分开对待。 */
.prose p a {
  min-height: 0;
  display: inline;
}

/* 网站地图等主内容区的链接列表：整行可点，命中区达标 */
.main-col ul li a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

/* 正文中的列表链接仍按行内处理 */
.prose ul li a,
.prose ol li a {
  display: inline;
  min-height: 0;
}

/* HTML 网站地图的链接列表 */
.map-cols a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  min-width: 44px;
}

/* ==========================================================================
   页脚密度优化
   44x44 命中区是给触控用的；桌面用鼠标不需要，按视口宽度分档：
   触控宽度（<1024px）保持 44px，桌面收紧到 34px。
   ========================================================================== */

@media (min-width: 1024px) {
  .footer-in a,
  .footer-bottom a {
    min-height: 34px;
  }

  .footer-in {
    padding: 44px 0 32px;
    gap: 28px;
  }
}

/* 移动端：栏目分两列，品牌区与联系区各占整行 */
@media (max-width: 1024px) {
  .footer-in {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 16px;
    padding: 32px 0 24px;
  }

  .f-brand,
  .f-contact {
    grid-column: 1 / -1;
  }

  .f-brand p {
    font-size: 13px;
    line-height: 1.7;
  }

  .f-contact p {
    margin: 4px 0;
  }
}

/* 返回顶部按钮固定在右下角，底栏右侧预留出让位空间，避免压住法律链接 */
@media (min-width: 768px) {
  .footer-bottom .w {
    padding-right: 78px;
  }
}


/* 在线留言的行为说明 */
.mf-note {
  margin: 10px 0 0;
  color: #9aa0a6;
  font-size: 13px;
  line-height: 1.7;
}

/* ZSite 生产模板适配：动态导航、服务端搜索和内容区响应式。 */
.main-nav > ul > li > div {
  display: flex;
  align-items: center;
}

.main-nav > ul > li > div > a {
  display: flex;
  align-items: center;
  height: 84px;
  padding: 0 22px;
  font-size: 16px;
  position: relative;
}

.main-nav > ul > li > div > a:hover,
.main-nav > ul > li > div > a:is([aria-current="page"], [data-nav-active="true"]) {
  color: var(--brand);
}

.main-nav > ul > li > div > a:is([aria-current="page"], [data-nav-active="true"])::after {
  content: "";
  position: absolute;
  left: 22px;
  right: 22px;
  bottom: 0;
  height: 3px;
  background: var(--brand);
}

.main-col,
.p-card,
.c-item,
.dl-card,
.side-box {
  min-width: 0;
}

.figure {
  margin: 0 0 24px;
  overflow: hidden;
  border: 1px solid var(--line);
}

.figure img {
  width: 100%;
  height: auto;
}

.c-item address {
  color: var(--mute);
  font-style: normal;
}



.result,
.empty {
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.result h2 {
  margin-bottom: 6px;
  font-size: 19px;
}

.empty {
  margin-top: 22px;
  padding: 28px;
  border: 1px solid var(--line);
  background: var(--gray);
}

.pagination {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 28px;
}

.page-item {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 44px;
  min-height: 44px;
  padding: 6px 12px;
  border: 1px solid var(--line);
}

.page-item-current {
  border-color: var(--brand);
  background: var(--brand);
  color: #fff;
}

[hidden] {
  display: none !important;
}

@media (min-width: 861px) {
  .has-sub > div > .nav-toggle {
    display: none;
  }
}

@media (max-width: 1024px) and (min-width: 861px) {
  .main-nav > ul > li > div > a {
    padding: 0 14px;
  }
}

@media (max-width: 860px) {
  .header-in > .nav-toggle,
  .has-sub > div > .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    min-width: 44px;
    height: 44px;
    margin: 0;
  }

  .header-in > .nav-toggle {
    width: auto;
    min-width: 72px;
    padding-inline: 10px;
    white-space: nowrap;
  }

  .header-in .logo-text .name {
    white-space: nowrap;
  }

  .has-sub > div {
    justify-content: space-between;
  }

  .main-nav > ul > li > div > a {
    flex: 1;
    height: auto;
    min-height: 48px;
    padding: 12px 20px;
  }

  .main-nav > ul > li > div > a:is([aria-current="page"], [data-nav-active="true"])::after {
    display: none;
  }

  .sub-nav,
  .main-nav li:hover > .sub-nav,
  .main-nav li:focus-within > .sub-nav {
    display: none;
  }

  .has-sub.on > .sub-nav,
  .has-sub.on:hover > .sub-nav,
  .has-sub.on:focus-within > .sub-nav {
    display: block;
  }

  .layout {
    padding-inline: 16px;
  }
}

@media (max-width: 640px) {
  .w,
  .main-col,
  .prose,
  .dl-card,
  .map-cols {
    min-width: 0;
    max-width: 100%;
  }

  .adv-grid,
  .c-grid,
  .scene-grid,
  .p-grid,
  .map-cols {
    grid-template-columns: minmax(0, 1fr);
  }

  .prose,
  .c-item,
  .dl-info,
  .result {
    overflow-wrap: anywhere;
  }

  .footer-bottom .w {
    padding-right: 16px;
  }
}

@media (max-width: 360px) {
  .header-in {
    gap: 8px;
  }

  .header-in .logo {
    min-width: 0;
    gap: 8px;
  }

  .header-in .logo-text .name {
    font-size: 20px;
  }

  .header-in > .nav-toggle {
    min-width: 64px;
    padding-inline: 8px;
  }
}