/* ==========================================================================
   QiFeng 首页样式 —— 按 HeziPlus 主题视觉还原
   与 qivps.css 隔离，互不影响
   ========================================================================== */

.qf-page {
  --qf-blue: #1d4ed8;
  --qf-blue-hover: #3b82f6;
  --qf-blue-light: #0052d9;
  --qf-title: #25345c;
  --qf-text: #4b5563;
  --qf-text-light: #6b7280;
  --qf-line: #e5e7eb;
  --qf-bg-soft: #f5f7fb;
  --qf-dark: #1b2436;
  --qf-radius: 8px;
  --qf-width: 80rem;
  overflow-x: hidden;
}

.qf-page *,
.qf-page *::before,
.qf-page *::after {
  box-sizing: border-box;
}

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

.qf-page a {
  color: inherit;
  text-decoration: none;
}

.qf-page button {
  font: inherit;
  cursor: pointer;
  border: 0;
  background: none;
}

.qf-wrap {
  width: min(var(--qf-width), calc(100% - 48px));
  margin: 0 auto;
}

/* ---------- 通用标题 ---------- */
.qf-sec-title {
  text-align: center;
}

.qf-sec-title h2 {
  margin: 0;
  color: var(--qf-title);
  font-size: 1.8rem;
  font-weight: 700;
  line-height: 1.7;
  letter-spacing: .02em;
}

.qf-sec-title p {
  margin: 1rem 0 0;
  color: var(--qf-text);
  font-size: .875rem;
  line-height: 1.7;
  letter-spacing: .1rem;
}

/* ==========================================================================
   1. 顶部导航
   ========================================================================== */
.qf-header {
  position: sticky;
  top: 0;
  z-index: 60;
  background: #fff;
  box-shadow: 0 1px 0 rgba(16, 39, 74, .06);
  transition: box-shadow .25s ease;
}

.qf-header.is-scrolled {
  box-shadow: 0 8px 24px rgba(12, 35, 66, .1);
}

.qf-header-inner {
  display: flex;
  align-items: center;
  gap: 2rem;
  height: 68px;
}

.qf-logo {
  display: flex;
  align-items: center;
  gap: .5rem;
  flex-shrink: 0;
}

.qf-logo img {
  height: 40px;
  width: auto;
}

.qf-nav {
  display: flex;
  align-items: center;
  gap: 2rem;
  flex: 1;
  min-width: 0;
}

.qf-nav-item {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  height: 68px;
  color: #1f2937;
  font-size: .9375rem;
  white-space: nowrap;
  transition: color .2s ease;
}

.qf-nav-item:hover,
.qf-nav-item.is-active {
  color: var(--qf-blue);
}

.qf-nav-item .qf-caret {
  width: 0;
  height: 0;
  border: 4px solid transparent;
  border-top-color: currentColor;
  transform: translateY(2px);
  opacity: .55;
}

.qf-nav-item .qf-hot {
  position: absolute;
  top: 14px;
  right: -26px;
  padding: 0 5px;
  border-radius: 8px 8px 8px 0;
  background: #e63946;
  color: #fff;
  font-size: 10px;
  font-style: normal;
  line-height: 15px;
  letter-spacing: 0;
  transform: scale(.92);
}

/* 下拉 */
.qf-dropdown {
  position: absolute;
  top: 100%;
  left: 50%;
  min-width: 190px;
  padding: .5rem 0;
  border-radius: var(--qf-radius);
  background: #fff;
  box-shadow: 0 12px 32px rgba(12, 35, 66, .14);
  opacity: 0;
  visibility: hidden;
  transform: translate(-50%, 8px);
  transition: all .22s ease;
}

.qf-nav-item:hover .qf-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}

.qf-dropdown a {
  display: block;
  padding: .55rem 1.25rem;
  color: #374151;
  font-size: .875rem;
  white-space: nowrap;
  transition: all .2s ease;
}

.qf-dropdown a:hover {
  background: var(--qf-bg-soft);
  color: var(--qf-blue);
  padding-left: 1.6rem;
}

/* 巨型菜单（产品中心：点击从上往下滑出全幅面板，再点收回） */
.qf-nav-item--mega.is-open {
  color: var(--qf-blue);
}

.qf-nav-item--mega .qf-caret {
  transition: transform .25s ease;
}

.qf-nav-item--mega.is-open .qf-caret {
  transform: translateY(2px) rotate(180deg);
}

/* 收起：0fr 折叠；展开：1fr，真实的高度过渡（从上往下推出/收回） */
.qf-mega {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows .32s ease;
  pointer-events: none;
  z-index: 55;
}

.qf-mega.is-open {
  grid-template-rows: 1fr;
  pointer-events: auto;
}

.qf-mega-clip {
  overflow: hidden;
  min-height: 0;
  background: #fff;
  border-radius: 0 0 var(--qf-radius) var(--qf-radius);
  box-shadow: 0 24px 48px rgba(12, 35, 66, .16);
}

.qf-mega-inner {
  display: flex;
  align-items: stretch;
  padding-top: 1.25rem;
  padding-bottom: 1.5rem;
  min-height: 320px;
}

.qf-mega-side {
  position: relative;
  flex-shrink: 0;
  width: 220px;
  padding: .25rem .75rem .25rem 0;
  border-right: 1px solid rgba(16, 39, 74, .07);
}

/* 灰色侧栏向左延伸到视口边缘（与 guvps 一致） */
.qf-mega-side::before {
  content: "";
  position: absolute;
  top: -1.25rem;
  bottom: -1.5rem;
  left: -50vw;
  right: 0;
  background: var(--qf-bg-soft);
  border-radius: 0 0 0 var(--qf-radius);
  z-index: 0;
}

.qf-mega-cat {
  position: relative;
  z-index: 1;
}

.qf-mega-cat {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  margin-bottom: .25rem;
  padding: .7rem .9rem;
  border: 0;
  border-radius: 6px;
  background: transparent;
  color: #374151;
  font-size: .875rem;
  text-align: left;
  cursor: pointer;
  transition: all .18s ease;
}

.qf-mega-cat:hover {
  color: var(--qf-blue);
}

.qf-mega-cat.is-active {
  background: #fff;
  color: var(--qf-blue);
  font-weight: 600;
  box-shadow: 0 2px 10px rgba(12, 35, 66, .08);
}

.qf-mega-cat::after {
  content: "›";
  color: #b6bdc9;
  font-size: 1rem;
  line-height: 1;
}

.qf-mega-cat.is-active::after {
  color: var(--qf-blue);
}

.qf-mega-main {
  flex: 1;
  min-width: 0;
  padding: .25rem 0 .25rem 1.75rem;
}

.qf-mega-panel {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: .9rem;
}

.qf-mega-panel[hidden] {
  display: none;
}

.qf-mega-card {
  display: flex;
  flex-direction: column;
  gap: .3rem;
  padding: 1rem 1.1rem;
  border: 1px solid rgba(16, 39, 74, .06);
  border-radius: 8px;
  background: #fff;
  transition: all .2s ease;
}

.qf-mega-card:hover {
  border-color: rgba(45, 110, 255, .35);
  box-shadow: 0 8px 20px rgba(12, 35, 66, .1);
  transform: translateY(-2px);
}

.qf-mega-card-t {
  color: #1f2937;
  font-size: .9rem;
  font-weight: 600;
}

.qf-mega-card:hover .qf-mega-card-t {
  color: var(--qf-blue);
}

.qf-mega-card-d {
  color: #8b93a3;
  font-size: .78rem;
  line-height: 1.5;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.qf-header-actions {
  display: flex;
  align-items: center;
  gap: .35rem;
  flex-shrink: 0;
  font-size: .875rem;
}

.qf-header-actions > a {
  display: inline-flex;
  align-items: center;
  gap: .3rem;
  padding: .3rem .55rem;
  color: #374151;
  white-space: nowrap;
  transition: color .2s ease;
}

.qf-header-actions > a:hover {
  color: var(--qf-blue);
}

.qf-header-actions svg {
  width: 15px;
  height: 15px;
  fill: currentColor;
}

.qf-header-actions .qf-signup {
  margin-left: .5rem;
  padding: .45rem 1.1rem;
  border-radius: 4px;
  background: var(--qf-blue);
  color: #fff;
  transition: background .2s ease;
}

.qf-header-actions .qf-signup:hover {
  background: var(--qf-blue-hover);
  color: #fff;
}

.qf-header-mask {
  display: none;
}

/* ==========================================================================
   2. 首屏轮播
   ========================================================================== */
.qf-banner {
  position: relative;
  height: 30rem;
  overflow: hidden;
  background: #0f1a2e;
}

.qf-banner-track {
  position: absolute;
  inset: 0;
}

.qf-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  visibility: hidden;
  transition: opacity .8s ease, visibility .8s ease;
}

.qf-slide.is-active {
  opacity: 1;
  visibility: visible;
}

.qf-slide-media,
.qf-slide-media img,
.qf-slide-media video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.qf-slide-media video {
  z-index: 2;
}

.qf-slide-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(9, 20, 40, .62) 0%, rgba(9, 20, 40, .3) 30%, rgba(9, 20, 40, 0) 55%);
}

.qf-slide-body {
  position: relative;
  z-index: 3;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  gap: 1.5rem;
  height: 100%;
  padding-top: 3.6rem;
}

.qf-slide-body h1 {
  margin: 0;
  max-width: 40rem;
  color: #fff;
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.35;
}

.qf-slide-body p {
  margin: 0;
  width: 30rem;
  max-width: 100%;
  color: #d6d6d6;
  font-size: .875rem;
  line-height: 1.7;
}

.qf-slide-btn {
  display: inline-block;
  padding: .55rem 1.5rem;
  border-radius: 4px;
  background: var(--qf-blue);
  color: #fff !important;
  font-size: .8rem;
  transition: background .2s ease;
}

.qf-slide-btn:hover {
  background: var(--qf-blue-hover);
}

/* 轮播控制 */
.qf-banner-ctrl {
  position: absolute;
  left: 50%;
  bottom: 2.6rem;
  z-index: 6;
  display: flex;
  align-items: center;
  gap: 1rem;
  transform: translateX(-50%);
}

.qf-banner-ctrl .qf-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: rgba(255, 255, 255, .18);
  color: #fff;
  transition: background .2s ease;
}

.qf-banner-ctrl .qf-arrow:hover {
  background: rgba(255, 255, 255, .34);
}

.qf-banner-ctrl .qf-arrow svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.qf-dots {
  display: flex;
  align-items: center;
  gap: .5rem;
}

.qf-dots button {
  width: 34px;
  height: 3px;
  border-radius: 2px;
  background: rgba(255, 255, 255, .42);
  transition: all .3s ease;
}

.qf-dots button.is-active {
  width: 46px;
  background: #fff;
}

/* ==========================================================================
   3. 快捷入口条
   ========================================================================== */
.qf-promo {
  position: relative;
  z-index: 5;
  padding: 2.5rem 0 3rem;
  background: #fff;
}

.qf-promo-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 1rem;
}

.qf-promo-item {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: 1rem .5rem;
  border-radius: var(--qf-radius);
  transition: all .25s ease;
}

.qf-promo-item:hover {
  background: var(--qf-bg-soft);
  transform: translateY(-3px);
}

.qf-promo-item img {
  width: 40px;
  height: 40px;
  flex-shrink: 0;
  object-fit: contain;
}

.qf-promo-item strong {
  display: block;
  color: #1f2937;
  font-size: .875rem;
  font-weight: 600;
  line-height: 1.5;
  white-space: nowrap;
}

.qf-promo-item span {
  display: block;
  margin-top: 2px;
  color: var(--qf-text-light);
  font-size: .6875rem;
  line-height: 1.5;
  white-space: nowrap;
}

/* ==========================================================================
   4. 畅销推荐
   ========================================================================== */
.qf-shop {
  padding: 4rem 0 3rem;
  background: #fff;
}

.qf-shop-panel {
  position: relative;
  margin-top: 3rem;
  padding: 0 0 3.5rem;
  border-radius: 10px;
  background: linear-gradient(180deg, #f7f9fc 0%, #eef2f9 100%);
  overflow: hidden;
}

.qf-shop-panel::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 180px;
  background: linear-gradient(90deg, #3b6fe0 0%, #4f7fe8 58%, #6b5ce7 100%);
}

.qf-shop-tabs {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .75rem 1rem;
}

.qf-shop-tabs .qf-tab {
  padding: .5rem 1.25rem;
  border-radius: 999px;
  color: rgba(255, 255, 255, .88);
  font-size: .875rem;
  transition: all .2s ease;
}

.qf-shop-tabs .qf-tab:hover {
  color: #fff;
}

.qf-shop-tabs .qf-tab.is-active {
  background: #fff;
  color: var(--qf-blue);
  font-weight: 600;
}

.qf-shop-tabs .qf-view-all {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  margin-left: auto;
  padding: .45rem 1.1rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, .18);
  color: #fff;
  font-size: .8125rem;
  transition: background .2s ease;
}

.qf-shop-tabs .qf-view-all:hover {
  background: rgba(255, 255, 255, .3);
}

.qf-shop-tabs .qf-view-all svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

.qf-shop-body {
  position: relative;
  z-index: 2;
  padding: 0 1rem;
}

.qf-shop-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 260px));
  gap: 1.25rem;
}

.qf-shop-grid[hidden] {
  display: none;
}

.qf-shop-card {
  padding: 1.25rem;
  border-radius: 10px;
  background: #fff;
  box-shadow: 0 6px 20px rgba(23, 43, 77, .08);
  transition: all .25s ease;
}

.qf-shop-card:hover {
  box-shadow: 0 14px 34px rgba(23, 43, 77, .14);
  transform: translateY(-4px);
}

.qf-shop-card h3 {
  margin: 0;
  color: #1f2937;
  font-size: 1rem;
  font-weight: 700;
}

.qf-shop-card .qf-tips {
  margin: .35rem 0 1rem;
  color: var(--qf-text-light);
  font-size: .75rem;
}

.qf-spec {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: .55rem .75rem;
}

.qf-spec div {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: .5rem;
  font-size: .75rem;
}

.qf-spec dt,
.qf-spec .k {
  color: #8b93a3;
  flex-shrink: 0;
}

/* 规格行左侧是商品名时允许收缩并省略，避免长名称把价格挤出去 */
.qf-spec .k.is-name {
  flex: 1 1 auto;
  min-width: 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.qf-spec dd,
.qf-spec .v {
  margin: 0;
  color: #1f2937;
  font-weight: 600;
}

.qf-shop-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px dashed var(--qf-line);
}

.qf-price {
  color: var(--qf-blue);
  font-size: 1.25rem;
  font-weight: 700;
}

.qf-price em {
  font-size: .8125rem;
  font-style: normal;
  font-weight: 400;
}

.qf-buy {
  padding: .45rem 1.1rem;
  border-radius: 999px;
  background: var(--qf-blue);
  color: #fff;
  font-size: .8125rem;
  transition: background .2s ease;
}

.qf-buy:hover {
  background: var(--qf-blue-hover);
}

/* ==========================================================================
   5. 云市场
   ========================================================================== */
.qf-market {
  padding: 4rem 0 5rem;
  background: linear-gradient(180deg, #fff 0%, #fdf7f4 52%, #fbf1ec 100%);
}

.qf-market-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
  margin-top: 3rem;
}

.qf-market-text {
  color: var(--qf-text);
  font-size: .875rem;
  line-height: 2;
}

.qf-market-text b {
  color: var(--qf-title);
  font-size: 1.05rem;
  font-weight: 700;
}

.qf-market-feats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: .75rem 1.5rem;
  margin-top: 2rem;
}

.qf-market-feats div {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: .6rem .9rem;
  border-radius: 6px;
  background: rgba(255, 255, 255, .72);
  color: #374151;
  font-size: .8125rem;
}

.qf-market-feats svg {
  width: 15px;
  height: 15px;
  flex-shrink: 0;
  fill: var(--qf-blue-light);
}

.qf-market-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}

.qf-market-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: .85rem;
  padding: 2rem .75rem;
  border-radius: 10px;
  background: #fff;
  color: #374151;
  font-size: .875rem;
  box-shadow: 0 4px 16px rgba(23, 43, 77, .07);
  transition: all .25s ease;
}

.qf-market-card:hover {
  color: var(--qf-blue);
  box-shadow: 0 12px 28px rgba(23, 43, 77, .14);
  transform: translateY(-4px);
}

.qf-market-card i {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: linear-gradient(135deg, #eef3ff 0%, #e2ebff 100%);
  color: var(--qf-blue);
}

.qf-market-card i svg {
  width: 24px;
  height: 24px;
  fill: currentColor;
}

/* ==========================================================================
   6. 行业解决方案
   ========================================================================== */
.qf-solution {
  position: relative;
  padding: 4rem 0 5rem;
  background: #1b2436;
  overflow: hidden;
}

.qf-solution::before,
.qf-solution::after {
  content: "";
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  pointer-events: none;
}

.qf-solution::before {
  top: -120px;
  left: -100px;
  width: 420px;
  height: 420px;
  background: rgba(59, 111, 224, .28);
}

.qf-solution::after {
  right: -140px;
  bottom: -160px;
  width: 460px;
  height: 460px;
  background: rgba(107, 92, 231, .22);
}

.qf-solution .qf-sec-title h2 {
  color: #fff;
}

.qf-solution .qf-sec-title p {
  color: rgba(255, 255, 255, .58);
}

.qf-sol-tabs {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin-top: 2.5rem;
  background: #fff;
  border-radius: 10px;
  overflow: hidden;
}

.qf-sol-tabs button {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .75rem;
  flex: 1;
  padding: 1.15rem .5rem;
  color: #1f2937;
  font-size: 1.05rem;
  font-weight: 600;
  white-space: nowrap;
  transition: all .25s ease;
}

.qf-sol-tabs button::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  width: 1px;
  height: 22px;
  background: var(--qf-line);
  transform: translateY(-50%);
}

.qf-sol-tabs button:last-child::after {
  display: none;
}

.qf-sol-tabs button em {
  color: var(--qf-blue);
  font-size: 1.35rem;
  font-style: normal;
  font-weight: 800;
  letter-spacing: -.02em;
}

.qf-sol-tabs button.is-active {
  background: linear-gradient(135deg, #3b6fe0 0%, #4f7fe8 100%);
  color: #fff;
}

.qf-sol-tabs button.is-active em {
  color: rgba(255, 255, 255, .9);
}

.qf-sol-tabs button.is-active::after,
.qf-sol-tabs button.is-active + button::after {
  display: none;
}

.qf-sol-body {
  position: relative;
  z-index: 2;
  display: none;
  grid-template-columns: 1fr 1fr;
  gap: 3.5rem;
  align-items: center;
  margin-top: 3rem;
  padding: 0 1rem;
}

.qf-sol-body.is-active {
  display: grid;
}

.qf-sol-body[hidden] {
  display: none;
}

/* 笔记本样机 */
.qf-laptop {
  position: relative;
  padding: 12px 12px 0;
  border-radius: 12px 12px 0 0;
  background: linear-gradient(180deg, #3a4356 0%, #262e3e 100%);
  box-shadow: 0 24px 60px rgba(0, 0, 0, .38);
}

.qf-laptop-screen {
  height: 320px;
  border-radius: 6px;
  background: #fff;
  overflow: hidden;
}

.qf-laptop-screen img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
}

.qf-laptop-base {
  position: relative;
  height: 12px;
  margin: 0 -46px;
  border-radius: 0 0 10px 10px;
  background: linear-gradient(180deg, #d3d7de 0%, #a8aeb9 100%);
}

.qf-laptop-base::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 0;
  width: 96px;
  height: 5px;
  border-radius: 0 0 6px 6px;
  background: rgba(0, 0, 0, .18);
  transform: translateX(-50%);
}

.qf-sol-copy h3 {
  margin: 0 0 1rem;
  padding-bottom: 1rem;
  border-bottom: 2px solid var(--qf-blue);
  color: #fff;
  font-size: 1.35rem;
  font-weight: 700;
  display: inline-block;
  border-bottom: 2px solid var(--qf-blue);
}

.qf-sol-copy > h3 {
  display: block;
}

.qf-sol-copy p {
  margin: 1.25rem 0 0;
  color: rgba(255, 255, 255, .68);
  font-size: .875rem;
  line-height: 2;
}

.qf-sol-stats {
  display: flex;
  gap: 3.5rem;
  margin-top: 2rem;
}

.qf-sol-stats strong {
  display: block;
  color: #fff;
  font-size: 2rem;
  font-weight: 700;
  line-height: 1.3;
}

.qf-sol-stats span {
  color: rgba(255, 255, 255, .55);
  font-size: .8125rem;
}

.qf-sol-btn {
  display: inline-block;
  margin-top: 2rem;
  padding: .6rem 1.75rem;
  border-radius: 4px;
  background: var(--qf-blue);
  color: #fff;
  font-size: .875rem;
  transition: background .2s ease;
}

.qf-sol-btn:hover {
  background: var(--qf-blue-hover);
}

/* ==========================================================================
   7. 为何选择我们
   ========================================================================== */
.qf-why {
  padding: 4rem 0 5rem;
  background: #fff;
}

.qf-why-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-top: 3rem;
}

.qf-why-card {
  padding: 2rem 1.5rem 1.75rem;
  border: 1px solid #eef1f6;
  border-radius: 10px;
  background: #fff;
  text-align: center;
  box-shadow: 0 4px 16px rgba(23, 43, 77, .05);
  transition: all .25s ease;
}

.qf-why-card:hover {
  box-shadow: 0 16px 36px rgba(23, 43, 77, .12);
  transform: translateY(-6px);
}

.qf-why-card img {
  width: 56px;
  height: 56px;
  margin: 0 auto 1.25rem;
  object-fit: contain;
}

.qf-why-card h3 {
  margin: 0 0 .75rem;
  color: #1f2937;
  font-size: 1.0625rem;
  font-weight: 700;
}

.qf-why-card p {
  margin: 0;
  color: var(--qf-text-light);
  font-size: .8125rem;
  line-height: 1.9;
  text-align: left;
}

.qf-why-tags {
  display: flex;
  flex-wrap: wrap;
  gap: .5rem;
  margin-top: 1.5rem;
}

.qf-why-tags span {
  padding: .3rem .7rem;
  border-radius: 4px;
  background: var(--qf-bg-soft);
  color: #4b5563;
  font-size: .75rem;
}

/* ==========================================================================
   8. 合作伙伴
   ========================================================================== */
.qf-partner {
  padding: 4rem 0 5rem;
  background: linear-gradient(180deg, #fff 0%, #f5f7fb 100%);
}

.qf-partner-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.25rem;
  margin-top: 3rem;
}

.qf-partner-card {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100px;
  padding: 1rem;
  border-radius: 10px;
  background: #fff;
  box-shadow: 0 4px 16px rgba(23, 43, 77, .06);
  transition: all .25s ease;
}

.qf-partner-card:hover {
  box-shadow: 0 14px 32px rgba(23, 43, 77, .13);
  transform: translateY(-4px);
}

.qf-partner-card img {
  max-height: 60px;
  width: auto;
  object-fit: contain;
}

/* ==========================================================================
   9. 全球基础设施
   ========================================================================== */
.qf-build {
  padding: 4rem 0 5rem;
  background: #fff;
}

.qf-build-grid {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: 3rem;
  align-items: center;
  margin-top: 3rem;
}

.qf-build-copy h3 {
  margin: 0 0 .75rem;
  color: #1f2937;
  font-size: 1.5rem;
  font-weight: 700;
}

.qf-build-copy > p {
  margin: 0;
  color: var(--qf-text);
  font-size: .875rem;
  line-height: 1.9;
}

.qf-build-more {
  display: inline-flex;
  align-items: center;
  gap: .4rem;
  margin-top: 1.25rem;
  padding: .5rem 1.25rem;
  border-radius: 999px;
  background: var(--qf-blue);
  color: #fff;
  font-size: .8125rem;
  transition: background .2s ease;
}

.qf-build-more:hover {
  background: var(--qf-blue-hover);
}

.qf-build-more svg {
  width: 13px;
  height: 13px;
  fill: currentColor;
}

.qf-build-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.75rem 2rem;
  margin-top: 2.25rem;
}

.qf-build-stats strong {
  display: block;
  color: #111827;
  font-size: 2.25rem;
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -.02em;
}

.qf-build-stats span {
  color: var(--qf-text-light);
  font-size: .8125rem;
}

/* 地图 */
.qf-map {
  position: relative;
}

.qf-map img {
  width: 100%;
  height: auto;
  opacity: .92;
}

.qf-map-pin {
  position: absolute;
  display: flex;
  align-items: center;
  gap: .35rem;
  transform: translate(-50%, -50%);
  white-space: nowrap;
}

.qf-map-pin i {
  position: relative;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--qf-blue);
  box-shadow: 0 0 0 4px rgba(29, 78, 216, .18);
}

.qf-map-pin i::after {
  content: "";
  position: absolute;
  inset: -6px;
  border-radius: 50%;
  border: 1px solid rgba(29, 78, 216, .45);
  animation: qf-ping 2s ease-out infinite;
}

@keyframes qf-ping {
  0% { transform: scale(.6); opacity: .9; }
  100% { transform: scale(2.1); opacity: 0; }
}

.qf-map-pin span {
  padding: .2rem .55rem;
  border-radius: 4px;
  background: #fff;
  color: #374151;
  font-size: .75rem;
  box-shadow: 0 2px 10px rgba(23, 43, 77, .16);
}

.qf-certs {
  display: flex;
  align-items: center;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: 2rem;
  margin-top: 3rem;
  padding: 2rem 1rem;
  border-radius: 10px;
  background: var(--qf-bg-soft);
}

.qf-certs img {
  max-height: 68px;
  width: auto;
  object-fit: contain;
}

/* ==========================================================================
   10. 新闻动态
   ========================================================================== */
.qf-news {
  padding: 4rem 0 5rem;
  background: #fff;
}

.qf-news-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 2rem;
  margin-bottom: 2.5rem;
}

.qf-news-head .qf-news-label {
  display: block;
  color: #b8bec9;
  font-size: .8125rem;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
}

.qf-news-head h2 {
  margin: .5rem 0 0;
  color: #111827;
  font-size: 1.75rem;
  font-weight: 700;
}

.qf-news-switch {
  display: inline-flex;
  padding: 4px;
  border-radius: 6px;
  background: var(--qf-bg-soft);
}

.qf-news-switch button {
  padding: .5rem 1.5rem;
  border-radius: 4px;
  color: #4b5563;
  font-size: .875rem;
  transition: all .2s ease;
}

.qf-news-switch button.is-active {
  background: #fff;
  color: #111827;
  font-weight: 600;
  box-shadow: 0 1px 4px rgba(23, 43, 77, .12);
}

.qf-news-grid {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: 2rem;
  align-items: start;
}

.qf-news-feature {
  border: 1px solid #eef1f6;
  border-radius: 10px;
  overflow: hidden;
  background: #fff;
}

.qf-news-feature-img {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 300px;
  background: #f7f8fa;
}

.qf-news-feature-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.qf-news-feature-body {
  padding: 1.25rem;
}

.qf-news-feature-body time {
  display: block;
  color: var(--qf-text-light);
  font-size: .75rem;
}

.qf-news-feature-body h3 {
  margin: .5rem 0 1rem;
  color: #1f2937;
  font-size: 1.0625rem;
  font-weight: 600;
  line-height: 1.6;
}

.qf-news-more {
  display: block;
  padding: .7rem;
  border-radius: 4px;
  background: var(--qf-blue);
  color: #fff;
  font-size: .8125rem;
  text-align: center;
  transition: background .2s ease;
}

.qf-news-more:hover {
  background: var(--qf-blue-hover);
}

.qf-news-list {
  display: flex;
  flex-direction: column;
}

.qf-news-list[hidden] {
  display: none;
}

.qf-news-item {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: .5rem;
  border-radius: 6px;
  transition: all .2s ease;
}

.qf-news-item + .qf-news-item {
  margin-top: .25rem;
}

.qf-news-item img {
  width: 68px;
  height: 68px;
  flex-shrink: 0;
  border-radius: 4px;
  background: #f2f3f5;
  object-fit: cover;
}

.qf-news-item-title {
  flex: 1;
  min-width: 0;
  color: #4b5563;
  font-size: .875rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  transition: color .2s ease;
}

.qf-news-item time {
  flex-shrink: 0;
  color: #9aa1ad;
  font-size: .8125rem;
}

.qf-news-item.is-active {
  background: var(--qf-blue);
}

.qf-news-item.is-active .qf-news-item-title,
.qf-news-item.is-active time {
  color: #fff;
  font-weight: 600;
}

/* ==========================================================================
   11. 加入我们 CTA
   ========================================================================== */
.qf-cta {
  position: relative;
  padding: 5rem 0;
  overflow: hidden;
  background: #4f7fe8 center/cover no-repeat;
}

.qf-cta-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: .95;
}

.qf-cta-inner {
  position: relative;
  z-index: 2;
  text-align: center;
}

.qf-cta-inner h2 {
  margin: 0;
  color: #fff;
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: .04em;
  text-shadow: 0 2px 14px rgba(0, 0, 0, .22);
}

.qf-cta-inner a {
  display: inline-block;
  margin-top: 2rem;
  padding: .65rem 2rem;
  border-radius: 4px;
  background: rgba(255, 255, 255, .18);
  border: 1px solid rgba(255, 255, 255, .6);
  color: #fff;
  font-size: .875rem;
  transition: all .2s ease;
}

.qf-cta-inner a:hover {
  background: #fff;
  color: var(--qf-blue);
}

/* ==========================================================================
   12. 服务保障条
   ========================================================================== */
.qf-service {
  padding: 2.5rem 0;
  background: #fff;
  border-bottom: 1px solid #f0f2f6;
}

.qf-service-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.qf-service-item {
  display: flex;
  align-items: center;
  gap: .85rem;
}

.qf-service-item svg {
  width: 30px;
  height: 30px;
  flex-shrink: 0;
  fill: #3f4a5c;
}

.qf-service-item strong {
  display: block;
  color: #1f2937;
  font-size: .875rem;
  font-weight: 600;
}

.qf-service-item span {
  display: block;
  margin-top: 2px;
  color: var(--qf-text-light);
  font-size: .75rem;
}

/* ==========================================================================
   13. 页脚
   ========================================================================== */
.qf-footer {
  padding: 3.5rem 0 0;
  background: #fff;
}

.qf-footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1fr 1fr 1.4fr;
  gap: 2rem;
}

.qf-footer-col h3 {
  margin: 0 0 1.25rem;
  color: #111827;
  font-size: .9375rem;
  font-weight: 700;
}

.qf-footer-col a,
.qf-footer-col p {
  display: block;
  margin: 0 0 .7rem;
  color: #6b7280;
  font-size: .8125rem;
  line-height: 1.7;
  transition: color .2s ease;
}

.qf-footer-col a:hover {
  color: var(--qf-blue);
}

.qf-footer-col .qf-footer-brand {
  display: flex;
  align-items: center;
  gap: .5rem;
  margin-bottom: 1rem;
}

.qf-footer-col .qf-footer-brand img {
  height: 36px;
  width: auto;
}

.qf-footer-qr {
  width: 108px;
  height: 108px;
  margin-top: .5rem;
  padding: 4px;
  border: 1px solid var(--qf-line);
  border-radius: 6px;
  object-fit: contain;
}

.qf-footer-bottom {
  margin-top: 2rem;
  padding: 1.75rem 0 2rem;
  border-top: 1px solid #f0f2f6;
  color: #9aa1ad;
  font-size: .8125rem;
  line-height: 1.9;
}

.qf-footer-bottom .qf-license {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.5rem;
  margin-top: .5rem;
}

/* ==========================================================================
   14. 右侧悬浮
   ========================================================================== */
.qf-side {
  position: fixed;
  right: 14px;
  bottom: 90px;
  z-index: 80;
  display: flex;
  flex-direction: column;
  gap: .6rem;
}

.qf-side a,
.qf-side button {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: #fff;
  color: #3f4a5c;
  box-shadow: 0 4px 16px rgba(23, 43, 77, .16);
  transition: all .22s ease;
}

.qf-side a:hover,
.qf-side button:hover {
  color: var(--qf-blue);
  transform: translateY(-2px);
}

.qf-side svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.qf-side .qf-side-ticket {
  border-radius: 6px;
  background: linear-gradient(135deg, #5b8def 0%, #3b6fe0 100%);
  color: #fff;
  font-size: .6875rem;
  line-height: 1.15;
  text-align: center;
  letter-spacing: .06em;
  padding: .25rem;
}

.qf-side .qf-side-ticket:hover {
  color: #fff;
  background: linear-gradient(135deg, #6f9bf2 0%, #4a7cec 100%);
}

.qf-side .qf-side-tip {
  position: absolute;
  right: calc(100% + 10px);
  top: 50%;
  padding: .35rem .7rem;
  border-radius: 4px;
  background: rgba(27, 36, 54, .92);
  color: #fff;
  font-size: .75rem;
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-50%) translateX(6px);
  transition: all .2s ease;
}

.qf-side a:hover .qf-side-tip,
.qf-side button:hover .qf-side-tip {
  opacity: 1;
  visibility: visible;
  transform: translateY(-50%) translateX(0);
}

.qf-side .qf-top {
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
}

.qf-side .qf-top.is-show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* ==========================================================================
   响应式
   ========================================================================== */
@media (max-width: 1200px) {
  .qf-promo-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

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

@media (max-width: 1024px) {
  .qf-nav {
    display: none;
  }

  .qf-banner {
    height: 24rem;
  }

  .qf-slide-body h1 {
    font-size: 1.85rem;
  }

  .qf-slide-body p {
    width: 100%;
  }

  .qf-market-grid,
  .qf-sol-body.is-active,
  .qf-build-grid,
  .qf-news-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

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

  .qf-sol-tabs {
    flex-wrap: wrap;
  }

  .qf-sol-tabs button {
    flex: 1 0 45%;
    font-size: .9375rem;
  }

  .qf-sol-tabs button::after {
    display: none;
  }

  .qf-sol-tabs button:not(.is-active) {
    border-bottom: 1px solid var(--qf-line);
  }
}

@media (max-width: 768px) {
  .qf-wrap {
    width: calc(100% - 32px);
  }

  .qf-banner {
    height: 21rem;
  }

  .qf-slide-overlay {
    background: linear-gradient(180deg, rgba(9, 20, 40, .68) 0%, rgba(9, 20, 40, .5) 100%);
  }

  .qf-slide-body h1 {
    font-size: 1.5rem;
  }

  .qf-slide-body p {
    font-size: .8125rem;
  }

  .qf-promo-grid,
  .qf-shop-grid,
  .qf-market-cards,
  .qf-market-feats,
  .qf-why-grid,
  .qf-partner-grid,
  .qf-build-stats,
  .qf-service-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .qf-sec-title h2 {
    font-size: 1.4rem;
  }

  .qf-header-actions > a:not(.qf-signup) {
    display: none;
  }

  .qf-sol-stats {
    gap: 2rem;
  }

  .qf-sol-stats strong {
    font-size: 1.5rem;
  }

  .qf-laptop-screen {
    height: 200px;
  }

  .qf-news-head {
    flex-direction: column;
    align-items: flex-start;
  }

  .qf-cta-inner h2 {
    font-size: 1.35rem;
  }

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

  .qf-side {
    right: 8px;
    bottom: 70px;
  }

  .qf-side a,
  .qf-side button {
    width: 42px;
    height: 42px;
  }
}

@media (max-width: 480px) {
  .qf-promo-grid,
  .qf-why-grid,
  .qf-partner-grid,
  .qf-service-grid {
    grid-template-columns: 1fr;
  }

  .qf-shop-grid {
    grid-template-columns: 1fr;
  }

  .qf-promo-item {
    padding: .75rem .25rem;
  }
}

@media (prefers-reduced-motion: reduce) {
  .qf-map-pin i::after {
    animation: none;
  }

  .qf-slide {
    transition: none;
  }
}