/* ============================================
   站点页头
   ============================================ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--h-header);
  transition: background 0.4s var(--ease-out), box-shadow 0.4s var(--ease-out), height 0.4s var(--ease-out);
  background: transparent;
  color: #fff;
}
.site-header.scrolled {
  background: rgba(255, 255, 255, 0.97);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
  color: var(--c-dark);
  height: 72px;
  backdrop-filter: blur(12px);
}
/* 移动端菜单展开时同样使用白底深色 */
.site-header.menu-open {
  background: #fff;
  color: var(--c-dark);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.08);
}
.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 40px;
}

/* Logo（滚动前 contact 版，滚动后 header 版） */
.logo { display: flex; align-items: center; flex-shrink: 0; }
.logo-img { height: 44px; width: auto; display: block; }
.logo-img-scrolled { display: none; }
.site-header.scrolled .logo-img { display: none; }
.site-header.scrolled .logo-img-scrolled { display: block; }

/* 主导航 */
.main-nav { flex: 1; }
.main-nav > ul { display: flex; justify-content: center; gap: 6px; }
.nav-item { position: relative; }
.nav-link {
  display: flex; align-items: center; gap: 5px;
  padding: 10px 14px;
  font-size: 15px;
  position: relative;
  transition: color 0.3s;
  white-space: nowrap;
}
.nav-link::after {
  content: '';
  position: absolute;
  left: 14px; right: 14px; bottom: 2px;
  height: 2px;
  background: var(--c-primary);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 0.35s var(--ease-out);
}
.nav-link:hover::after,
.nav-link.active::after { transform: scaleX(1); }
.nav-link:hover { color: var(--c-primary); }
.arrow {
  width: 0; height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  transition: transform 0.3s;
}
.nav-item:hover .arrow { transform: rotate(180deg); }

/* 下拉子菜单 */
.sub-nav {
  position: absolute;
  top: 100%; left: 50%;
  transform: translateX(-50%) translateY(12px);
  width: max-content;
  min-width: 220px;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.14);
  padding: 18px;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.35s var(--ease-out), transform 0.35s var(--ease-out), visibility 0.35s;
  color: var(--c-dark);
  display: flex;
  gap: 18px;
}
.nav-item:hover .sub-nav,
.nav-item:focus-within .sub-nav,
.nav-item.open .sub-nav {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}
.sub-nav-inner { display: flex; flex-direction: column; gap: 4px; min-width: 150px; }
.sub-link {
  display: flex; align-items: center; gap: 10px;
  padding: 9px 12px;
  font-size: 14px;
  color: var(--c-gray);
  border-radius: 6px;
  transition: all 0.25s;
  white-space: nowrap;
}
.sub-link:hover { background: var(--c-bg); color: var(--c-primary); transform: translateX(4px); }
.sub-link.active { background: var(--c-bg); color: var(--c-primary); }
.sub-dot {
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--c-line);
  transition: background 0.25s;
}
.sub-link:hover .sub-dot,
.sub-link.active .sub-dot { background: var(--c-primary); }

/* 右侧 */
.header-aside { display: flex; align-items: center; gap: 24px; flex-shrink: 0; }
.site-header .hotline { display: flex; align-items: center; gap: 10px; }
.icon-phone {
  width: 34px; height: 34px;
  border-radius: 50%;
  background: rgba(43, 127, 255, 0.12);
  position: relative;
}
.icon-phone::after {
  content: '';
  position: absolute;
  inset: 0;
  margin: auto;
  width: 15px; height: 15px;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='%232b7fff' d='M6.62 10.79c1.44 2.83 3.76 5.14 6.59 6.59l2.2-2.2c.27-.27.67-.36 1.02-.24 1.12.37 2.33.57 3.57.57.55 0 1 .45 1 1V20c0 .55-.45 1-1 1-9.39 0-17-7.61-17-17 0-.55.45-1 1-1h3.5c.55 0 1 .45 1 1 0 1.25.2 2.45.57 3.57.11.35.03.74-.25 1.02l-2.2 2.2z'/%3E%3C/svg%3E") no-repeat center / contain;
}
.hotline-text { display: flex; flex-direction: column; line-height: 1.25; }
.hotline-text em { font-style: normal; font-size: 11px; opacity: 0.8; }
.hotline-text strong { font-size: 17px; font-family: var(--f-display); letter-spacing: 0.5px; }
.consult-btn { height: 44px; padding: 0 26px; font-size: 14px; }

/* 汉堡按钮 */
.hamburger {
  display: none; width: 44px; height: 44px;
  flex-direction: column; justify-content: center; align-items: center; gap: 6px;
  border-radius: 50%;
  transition: background 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}
.hamburger:hover { background: rgba(43, 127, 255, 0.1); }
.hamburger:active { transform: scale(0.92); }
.hamburger span {
  display: block; height: 2px; width: 22px;
  background: var(--c-primary);
  border-radius: 2px;
  transition: transform 0.35s var(--ease-out), opacity 0.35s;
}
.hamburger.active span:nth-child(1) { transform: translateY(8px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-8px) rotate(-45deg); }

@media (max-width: 1360px) {
  .site-header .hotline { display: none; }
  .header-inner { gap: 24px; }
  .main-nav > ul { gap: 2px; }
  .nav-link { padding: 10px 10px; font-size: 14px; }
  .consult-btn { padding: 0 20px; }
}
@media (min-width: 901px) and (max-width: 1100px) {
  @supports (zoom: 1) {
    .site-header .hotline { display: flex; }
    .header-inner { gap: 40px; }
    .main-nav > ul { gap: 6px; }
    .nav-link { padding: 10px 14px; font-size: 15px; }
    .consult-btn { padding: 0 26px; }
  }
}
@media (max-width: 900px) {
  .header-inner { justify-content: space-between; gap: 16px; }
  .hamburger { display: flex; margin-left: auto; }
  .header-aside .consult-btn { display: none; }
  .main-nav {
    position: fixed;
    top: 0; right: 0;
    width: min(84vw, 380px);
    height: 100vh;
    background: #fff;
    color: var(--c-dark);
    padding: 100px 28px 40px;
    transform: translateX(100%);
    visibility: hidden;
    transition: transform 0.45s var(--ease-out), visibility 0.45s;
    overflow-y: auto;
    box-shadow: -20px 0 60px rgba(0,0,0,0.15);
  }
  .main-nav.open { transform: translateX(0); visibility: visible; }
  .main-nav > ul { flex-direction: column; gap: 0; }
  .nav-link { padding: 15px 4px; font-size: 17px; border-bottom: 1px solid var(--c-bg); }
  .nav-link::after { display: none; }
  .sub-nav {
    position: static;
    transform: none;
    opacity: 1;
    visibility: visible;
    box-shadow: none;
    padding: 0 0 10px 14px;
    flex-direction: column;
    background: transparent;
  }
  .nav-item:hover .sub-nav { transform: none; }
}

/* ============================================
   咨询弹窗（翻书模式）
   ============================================ */
.consult-mask {
  position: fixed;
  inset: 0;
  z-index: 1500;
  background: rgba(7, 13, 28, 0.5);
  display: grid;
  place-items: center;
  padding: 24px;
  overscroll-behavior: contain;
  opacity: 0;
  pointer-events: none;
  display: none;
}
.consult-mask.open {
  display: grid;
  opacity: 1;
  pointer-events: auto;
  -webkit-backdrop-filter: blur(24px) saturate(140%);
  backdrop-filter: blur(24px) saturate(140%);
  animation: consultFade 0.3s var(--ease-out);
}
.consult-mask.closing {
  display: grid;
  opacity: 0;
  -webkit-backdrop-filter: blur(0) saturate(1);
  backdrop-filter: blur(0) saturate(1);
  transition: opacity 0.2s;
}
@keyframes consultFade {
  from { opacity: 0; }
  to { opacity: 1; }
}
.consult-mask.open .consult-box { animation: consultUp 0.45s var(--ease-out); }
@keyframes consultUp {
  from { transform: scale(0.96); opacity: 0; }
  to { transform: none; opacity: 1; }
}
.consult-box {
  position: relative;
  width: min(1000px, 92vw);
  height: 620px;
  max-width: 1000px;
  max-height: 90vh;
  overflow: hidden;
  background: transparent;
  box-shadow: none;
}
.consult-close {
  position: absolute;
  top: 14px; right: 14px;
  z-index: 10;
  width: 40px; height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  color: var(--c-gray-2);
  font-size: 22px;
  line-height: 1;
  display: grid;
  place-items: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.35s var(--ease-out), background 0.3s var(--ease-out), color 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}
.consult-box.ready .consult-close {
  opacity: 1;
  pointer-events: auto;
}
.consult-close:hover {
  background: var(--c-bg);
  color: var(--c-primary);
  transform: rotate(90deg);
}
@media (max-width: 1024px) {
  .consult-mask {
    display: flex;
    overflow-y: auto;
    padding: 20px 16px;
  }
  .consult-box {
    margin: auto;
    width: 100%;
    height: auto;
    max-height: none;
  }
  .consult-close {
    position: fixed;
    top: 12px;
    right: 12px;
  }
}

/* ============================================
   需求盒子（首页两栏 / 弹窗翻书 / 移动端仅表单）
   ============================================ */
.demand-box {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  border-radius: 18px;
  overflow: hidden;
  box-shadow: 0 24px 70px rgba(0, 0, 0, 0.1);
}
.demand-box.book {
  display: block;
  box-shadow: none;
  border-radius: 0;
  overflow: visible;
}
.demand-box.form-only {
  display: block;
  max-width: 560px;
  margin: 0 auto;
}
.modal-form-only { display: none; }

.book-scene {
  position: relative;
  width: 100%;
  height: 620px;
  --page-w: min(500px, 46vw);
  --half: min(250px, 23vw);
}
.book {
  position: absolute;
  left: 50%;
  margin-left: calc(0px - var(--half));
  top: 0;
  width: var(--page-w);
  height: 620px;
  transition: transform 0.7s cubic-bezier(0.45, 0, 0.2, 1);
}
.demand-box.cover-open .book { transform: translateX(var(--half)); }

.leaf {
  position: absolute;
  inset: 0;
  transform-style: preserve-3d;
  transform-origin: left center;
  transform: perspective(1800px) rotateY(0deg);
  transition: transform 0.7s cubic-bezier(0.45, 0, 0.2, 1);
}
.leaf .page {
  position: absolute;
  inset: 0;
  backface-visibility: hidden;
  overflow: hidden;
}
.leaf .page.back { transform: rotateY(180deg); }
.leaf.cover { z-index: 5; }
.demand-box.cover-open .leaf.cover {
  transform: perspective(1800px) rotateY(-180deg);
}

.page.front {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 12px;
  background: linear-gradient(120deg, #133263 0%, #1B5FD6 55%, #2B7FFF 100%);
  color: #fff;
  border-radius: 0 18px 18px 0;
  box-shadow: 0 18px 45px rgba(0, 0, 0, 0.45);
}
.page.back {
  border-radius: 18px 0 0 18px;
  box-shadow: -8px 8px 20px rgba(0, 0, 0, 0.18);
}
.book-logo {
  width: 220px;
  height: auto;
  display: block;
  margin-bottom: 20px;
  filter: drop-shadow(0 8px 18px rgba(0, 0, 0, 0.25));
}
.book-sub { font-style: normal; font-size: 12px; letter-spacing: 5px; color: rgba(255,255,255,0.65); text-transform: uppercase; }
.book-hint { margin-top: 6px; font-size: 13px; color: rgba(255,255,255,0.75); letter-spacing: 2px; }

.page.static {
  position: absolute;
  inset: 0;
  z-index: 2;
  background: #fff;
  border-radius: 0 18px 18px 0;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
  overflow: hidden;
}

.book-scene::after {
  content: '';
  position: absolute;
  left: 8%; right: 8%;
  bottom: -14px;
  height: 26px;
  background: radial-gradient(ellipse at center, rgba(0, 0, 0, 0.28), transparent 70%);
  filter: blur(8px);
  pointer-events: none;
}

@media (max-width: 900px) {
  .demand-box { grid-template-columns: 1fr; }
}
@media (max-width: 1024px) {
  .consult-box .book-scene { display: none; }
  .consult-box .modal-form-only { display: block; }
}
@media (max-height: 688px) {
  .book-scene {
    transform: scale(calc(90vh / 620px));
    transform-origin: top center;
  }
}

/* ============================================
   需求表单（表单字段）
   ============================================ */
.demand-form {
  background: #fff;
  padding: 56px 48px 40px;
  height: 100%;
  display: flex;
  flex-direction: column;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-field { margin-bottom: 22px; }
.form-field label {
  display: block;
  font-size: 14px;
  color: var(--c-dark);
  font-weight: 600;
  margin-bottom: 9px;
}
.form-field label em { font-style: normal; color: var(--c-error); }
.form-field input,
.form-field textarea {
  width: 100%;
  border: 1px solid var(--c-line);
  border-radius: 6px;
  padding: 13px 16px;
  font-size: 14px;
  color: var(--c-dark);
  background: var(--c-bg);
  transition: all 0.3s;
  resize: none;
}
.form-field input:focus,
.form-field textarea:focus {
  border-color: var(--c-primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(43, 127, 255, 0.1);
}
.checkbox-group { display: flex; flex-wrap: wrap; gap: 10px; }
.check-item {
  padding: 9px 18px;
  border: 1px solid var(--c-line);
  border-radius: 24px;
  font-size: 13px;
  color: var(--c-gray-2);
  cursor: pointer;
  transition: all 0.3s var(--ease-out);
  user-select: none;
}
.check-item input { display: none; }
.check-item:hover { border-color: var(--c-primary-light); color: var(--c-primary); }
.check-item.checked {
  background: rgba(43, 127, 255, 0.08);
  border-color: var(--c-primary);
  color: var(--c-primary);
  font-weight: 600;
}
.submit-btn { width: 100%; height: 54px; font-size: 16px; letter-spacing: 2px; margin-top: auto; }
.submit-btn.done { background: var(--c-success); pointer-events: none; }
.demand-form .form-tip { margin-top: 14px; font-size: 12px; color: var(--c-gray-3); text-align: center; }

@media (max-width: 640px) {
  .demand-form { padding: 34px 22px 28px; }
  .form-row { grid-template-columns: 1fr; gap: 0; }
  .check-item { padding: 8px 14px; }
}

/* ============================================
   需求信息面板
   ============================================ */
.info-panel {
  position: relative;
  height: 100%;
  display: flex;
  flex-direction: column;
  background: #133263;
  color: #fff;
  padding: 48px 44px;
  overflow: hidden;
  border-radius: 18px 0 0 18px;
}
.info-panel.qr {
  background-color: #133263;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 44px 44px;
}
.info-panel h2 {
  font-size: 34px;
  line-height: 1.4;
  letter-spacing: 2px;
  margin-bottom: 22px;
  position: relative;
}
.info-desc {
  font-size: 15px;
  line-height: 1.9;
  color: rgba(255, 255, 255, 0.65);
  margin-bottom: 26px;
  position: relative;
}
.info-hotline { position: relative; margin-bottom: 24px; }
.info-hotline em { font-style: normal; display: block; font-size: 13px; color: rgba(255,255,255,0.7); margin-bottom: 8px; }
.info-hotline strong {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--f-display);
  font-size: 24px;
  color: #ffffff;
  letter-spacing: 1px;
}
.info-hotline strong + strong { margin-top: 4px; }
.info-hotline strong span {
  font-family: var(--f-body);
  font-size: 13px;
  font-weight: 500;
  color: rgba(255,255,255,0.7);
  letter-spacing: 0;
}
.info-points { position: relative; display: flex; flex-direction: column; gap: 14px; }
.info-points li { display: flex; align-items: center; gap: 12px; font-size: 14px; color: rgba(255,255,255,0.78); }
.info-points i {
  font-style: normal;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: rgba(43, 127, 255, 0.2);
  color: var(--c-primary-light);
  display: grid; place-items: center;
  font-size: 12px;
  flex-shrink: 0;
}
.di-qr {
  position: relative;
  margin-top: auto;
  padding-top: 26px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.di-qr-item { display: flex; align-items: center; gap: 10px; }
.di-qr-img {
  flex-shrink: 0;
  width: 76px; height: 76px;
  padding: 5px;
  background: #fff;
  border-radius: 10px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
}
.di-qr-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  border-radius: 6px;
  display: block;
}
.di-qr-txt { display: flex; flex-direction: column; gap: 5px; }
.di-qr-txt strong { font-size: 14px; color: #fff; font-weight: 600; letter-spacing: 0.5px; }
.di-qr-txt span { font-size: 11px; color: rgba(255, 255, 255, 0.55); }

/* ============================================
   子页横幅
   ============================================ */
.sub-banner {
  position: relative;
  padding: 106px 0 46px;
  background-color: var(--c-black);
  color: #fff;
  overflow: hidden;
}
.sub-banner-bg {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
  transform: scale(1.12);
  animation: subKenburns 7s var(--ease-out) forwards;
  will-change: transform;
}
@keyframes subKenburns {
  from { transform: scale(1.12); }
  to { transform: scale(1); }
}
.sub-banner-mask {
  position: absolute; inset: 0;
  background: linear-gradient(120deg, rgba(5,10,30,0.7) 0%, rgba(5,10,30,0.38) 60%, rgba(5,10,30,0.12) 100%);
}
.sub-banner-deco {
  position: absolute;
  width: 420px; height: 420px;
  border-radius: 50%;
  right: -140px; top: -160px;
  background: radial-gradient(circle, rgba(43, 127, 255, 0.22), transparent 70%);
  animation: subBreathe 5s ease-in-out infinite;
}
@keyframes subBreathe {
  0%, 100% { transform: scale(1); opacity: 0.7; }
  50% { transform: scale(1.2); opacity: 1; }
}
.sub-banner-inner { position: relative; z-index: 1; }
.sub-en {
  display: block;
  font-family: var(--f-display);
  font-size: 14px;
  letter-spacing: 5px;
  text-transform: uppercase;
  color: var(--c-primary-light);
  margin-bottom: 18px;
  animation: riseIn 0.7s var(--ease-out) both;
}
.sub-banner h1 {
  font-size: 46px;
  font-weight: 700;
  letter-spacing: 3px;
  margin-bottom: 18px;
  animation: riseIn 0.7s var(--ease-out) 0.1s both;
}
.sub-desc {
  max-width: 620px;
  font-size: 16px;
  line-height: 1.9;
  color: rgba(255,255,255,0.7);
  margin-bottom: 30px;
  animation: riseIn 0.7s var(--ease-out) 0.2s both;
}
.sub-banner .crumbs {
  display: flex; align-items: center; gap: 12px;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  animation: riseIn 0.7s var(--ease-out) 0.3s both;
}
.sub-banner .crumbs a { transition: color 0.3s; }
.sub-banner .crumbs a:hover { color: var(--c-primary-light); }
.sub-banner .crumbs i { font-style: normal; opacity: 0.4; }
@keyframes riseIn {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: none; }
}
@media (max-width: 900px) {
  .sub-banner { padding: 81px 0 34px; }
  .sub-banner h1 { font-size: 34px; }
}
@media (max-width: 640px) {
  .sub-banner { padding: 64px 0 22px; }
  .sub-banner h1 { font-size: 24px; letter-spacing: 1px; }
  .sub-desc { font-size: 14px; }
}

/* ============================================
   站点页脚
   ============================================ */
.site-footer {
  position: relative;
  background-color: #133263;
  color: rgba(255,255,255,0.6);
  padding: 72px 0 0;
}
.site-footer::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(rgba(5, 11, 26, 0.88), rgba(5, 11, 26, 0.88)),
    var(--footer-bg, none) center / cover no-repeat;
  filter: blur(2px);
  pointer-events: none;
}
.site-footer > .container {
  position: relative;
  z-index: 1;
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 60px;
  padding-bottom: 48px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-logo { display: flex; align-items: center; margin-bottom: 20px; }
.footer-logo img { height: 46px; width: auto; display: block; }
.footer-slogan { font-size: 14px; line-height: 2; color: rgba(255,255,255,0.58); max-width: 340px; }

.footer-info { display: flex; align-items: flex-start; gap: 56px; flex-shrink: 0; }
.footer-contact { display: flex; flex-direction: column; gap: 16px; }
.contact-item em {
  display: block; font-style: normal;
  font-size: 12px; color: rgba(255,255,255,0.55);
  margin-bottom: 5px; letter-spacing: 1px;
}
.contact-item strong { color: rgba(255,255,255,0.85); font-size: 14px; font-weight: 500; }
.contact-item .phone {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-family: var(--f-display);
  font-size: 24px; font-weight: 700;
  color: #ffffff;
  letter-spacing: 1px;
}
.contact-item .phone + .phone { margin-top: 4px; }
.contact-item .phone .p-name {
  font-family: var(--f-body);
  font-size: 13px; font-weight: 500;
  color: rgba(255,255,255,0.65);
  letter-spacing: 0;
}

.footer-qr {
  display: flex;
  flex-direction: row;
  align-items: flex-start;
  gap: 18px;
  flex-shrink: 0;
  padding: 16px 18px;
  background: rgba(255, 255, 255, 0.07);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 12px;
  box-shadow: 0 10px 28px rgba(5, 11, 26, 0.28);
}
.footer-qr .qr-item { display: flex; flex-direction: column; align-items: center; gap: 10px; flex-shrink: 0; }
.qr-box {
  width: 88px; height: 88px;
  padding: 4px;
  background: #fff;
  border-radius: 8px;
  overflow: hidden;
  transition: all 0.3s var(--ease-out);
}
.qr-box img { width: 100%; height: 100%; object-fit: cover; border-radius: 4px; display: block; }
.footer-qr:hover .qr-box { transform: translateY(-4px); box-shadow: 0 10px 28px rgba(43, 127, 255, 0.3); }
.footer-qr p { font-size: 12px; color: rgba(255,255,255,0.55); }

.footer-nav {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 32px;
  padding: 44px 0;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.link-group h4 {
  color: #fff; font-size: 16px; font-weight: 600;
  margin-bottom: 20px;
  position: relative; padding-bottom: 12px;
}
.link-group h4::after {
  content: ''; position: absolute; left: 0; bottom: 0;
  width: 20px; height: 2px; background: var(--c-primary); border-radius: 1px;
}
.link-group a {
  display: block; font-size: 16px; margin-bottom: 14px;
  color: rgba(255,255,255,0.62);
  transition: color 0.3s, transform 0.3s var(--ease-out);
}
.link-group a:hover { color: var(--c-primary); transform: translateX(4px); }

.footer-friend { padding: 20px 0; border-bottom: 1px solid rgba(255,255,255,0.08); }
.friend-toggle { display: none; color: rgba(255,255,255,0.62); font-size: 14px; width: 100%; text-align: left; }
.t-arrow {
  display: inline-block; width: 0; height: 0; margin-left: 8px;
  border-left: 4px solid transparent; border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  transition: transform 0.3s;
}
.footer-friend.active .t-arrow { transform: rotate(180deg); }
.friend-list { display: flex; flex-wrap: wrap; gap: 8px 24px; }
.friend-item { font-size: 13px; color: rgba(255,255,255,0.55); }

.footer-bottom {
  padding: 24px 0;
  display: flex; align-items: center; justify-content: center; gap: 24px; flex-wrap: wrap;
  font-size: 13px; color: rgba(255,255,255,0.5);
}
.footer-bottom a {
  color: rgba(255,255,255,0.55);
  text-decoration: none;
  transition: color 0.3s;
}
.footer-bottom a:hover { color: var(--c-primary-light); }

@media (max-width: 900px) {
  .footer-top { flex-direction: column; gap: 36px; }
  .footer-info { gap: 40px; }
  .footer-nav { grid-template-columns: repeat(3, 1fr); gap: 28px; }
}
@media (max-width: 640px) {
  .site-footer { padding-top: 52px; }
  .footer-top { gap: 28px; }
  .footer-info { flex-direction: column; gap: 28px; }
  .footer-qr { flex-direction: row; align-items: center; padding: 14px 16px; gap: 14px; }
  .footer-nav { grid-template-columns: repeat(2, 1fr); gap: 24px; padding: 32px 0; }
  .friend-toggle { display: block; }
  .friend-list { display: none; margin-top: 14px; }
  .footer-friend.active .friend-list { display: flex; }
  .footer-bottom { flex-direction: column; gap: 6px; text-align: center; }
}

/* ============================================
   悬浮联系侧边栏 + 回到顶部
   ============================================ */
.float-bar {
  position: fixed;
  right: 24px;
  bottom: 88px;
  z-index: 900;
  width: 54px;
  display: flex;
  justify-content: flex-end;
}
.float-widget { position: relative; }

.float-trigger {
  position: relative;
  width: 54px; height: 54px;
  border-radius: 50%;
  display: grid; place-items: center;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-deep));
  color: #fff;
  cursor: pointer;
  box-shadow: 0 12px 30px rgba(43, 127, 255, 0.38);
  transition: transform 0.35s var(--ease-out), box-shadow 0.35s;
  animation: breathe 3s ease-in-out infinite;
}
.float-trigger:hover { transform: scale(1.08); box-shadow: 0 18px 40px rgba(43, 127, 255, 0.5); animation-play-state: paused; }
.float-trigger.open { animation: none; }
@keyframes breathe {
  0%, 100% { box-shadow: 0 12px 30px rgba(43, 127, 255, 0.38); }
  50% { box-shadow: 0 12px 38px rgba(43, 127, 255, 0.6); }
}
.trigger-icon {
  grid-area: 1 / 1;
  display: grid; place-items: center;
  color: #fff;
  transition: opacity 0.3s var(--ease-out), transform 0.35s var(--ease-out);
}
.trigger-icon svg { width: 23px; height: 23px; display: block; }
.trigger-icon-close { opacity: 0; transform: rotate(-90deg) scale(0.5); }
.float-trigger:hover .trigger-icon-chat,
.float-trigger.open .trigger-icon-chat { opacity: 0; transform: rotate(90deg) scale(0.5); }
.float-trigger:hover .trigger-icon-close,
.float-trigger.open .trigger-icon-close { opacity: 1; transform: none; }

.contact-card {
  position: absolute;
  right: calc(100% + 14px);
  bottom: 0;
  width: 260px;
  background: #fff;
  border: 1px solid rgba(43, 127, 255, 0.08);
  border-radius: 16px;
  box-shadow: 0 20px 50px rgba(15, 40, 90, 0.18);
  overflow: hidden;
  opacity: 0;
  transform: translateX(12px) scale(0.96);
  transform-origin: bottom right;
  pointer-events: none;
  transition: opacity 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}
.float-widget.open .contact-card {
  opacity: 1;
  transform: none;
  pointer-events: auto;
}
.card-header {
  display: flex;
  align-items: baseline;
  gap: 8px;
  padding: 14px 16px 10px;
  border-bottom: 1px solid var(--c-bg);
}
.card-header strong { font-size: 15px; color: var(--c-black); letter-spacing: 0.5px; }
.card-header em { font-style: normal; font-size: 11px; color: var(--c-gray-3); }

.card-body { padding: 4px 8px; }
.contact-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 9px 8px;
  border-radius: 10px;
  transition: background 0.3s;
}
.contact-row:hover { background: var(--c-bg); }
.row-icon {
  width: 32px; height: 32px;
  flex-shrink: 0;
  display: grid; place-items: center;
  background: rgba(43, 127, 255, 0.1);
  border-radius: 9px;
  color: var(--c-primary);
}
.row-icon svg { width: 16px; height: 16px; display: block; }
.row-main { flex: 1; min-width: 0; display: flex; flex-direction: column; line-height: 1.3; }
.row-main em { font-style: normal; font-size: 10px; color: var(--c-gray-3); }
.row-main strong { font-size: 13px; color: var(--c-black); font-family: var(--f-display); letter-spacing: 0.2px; margin-top: 1px; }
.row-main .row-name {
  margin-left: 6px;
  padding: 1px 6px;
  border-radius: 8px;
  background: rgba(43, 127, 255, 0.1);
  color: var(--c-primary);
  font-family: var(--f-body);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0;
  white-space: nowrap;
}
.row-copy {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  min-width: 46px;
  height: 25px;
  padding: 0 10px;
  border-radius: 14px;
  border: 1px solid var(--c-line);
  background: #fff;
  font-size: 11px;
  color: var(--c-gray-2);
  cursor: pointer;
  transition: all 0.3s var(--ease-out);
}
.row-copy:hover { border-color: var(--c-primary); color: var(--c-primary); background: rgba(43, 127, 255, 0.05); }
.row-copy.ok {
  border-color: var(--c-success);
  color: var(--c-success);
  background: var(--c-success-soft);
  animation: copyPop 0.35s var(--ease-out);
}
.copy-check { display: inline-flex; }
.copy-check svg { width: 13px; height: 13px; }
@keyframes copyPop {
  0% { transform: scale(0.85); }
  60% { transform: scale(1.1); }
  100% { transform: scale(1); }
}
.qr-row { flex-direction: column; align-items: stretch; gap: 10px; }
.qr-head { display: flex; align-items: center; gap: 10px; }
.row-qr {
  width: 96px; height: 96px;
  margin: 0 auto;
  padding: 5px;
  background: #fff;
  border-radius: 10px;
  border: 1px solid var(--c-line);
  box-shadow: 0 4px 14px rgba(15, 40, 90, 0.08);
}
.row-qr img { width: 100%; height: 100%; object-fit: cover; display: block; border-radius: 6px; }

.card-cta {
  display: block;
  margin: 4px 12px 12px;
  padding: 10px;
  text-align: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-deep));
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  transition: filter 0.3s, transform 0.3s var(--ease-out);
}
.card-cta:hover { filter: brightness(1.08); transform: translateY(-2px); }

.back-top {
  position: fixed;
  right: 29px;
  bottom: 32px;
  z-index: 900;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.94);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(43, 127, 255, 0.1);
  display: grid; place-items: center;
  cursor: pointer;
  color: var(--c-primary);
  box-shadow: 0 8px 24px rgba(15, 40, 90, 0.12);
  opacity: 0;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.35s, transform 0.35s var(--ease-out), background 0.3s;
}
.back-top svg { width: 20px; height: 20px; display: block; }
.back-top.show { opacity: 1; pointer-events: auto; transform: none; }
.back-top:hover { background: rgba(43, 127, 255, 0.1); transform: scale(1.08); }

@media (max-width: 900px) {
  .float-bar { display: none; }
}

/* ============================================
   案例卡片组件（全站统一，与 IT_Web 一致 1:1.1）
   ============================================ */
.case-card {
  position: relative;
  display: block;
  border-radius: 14px;
  overflow: hidden;
  aspect-ratio: 1 / 1.1;
  background: var(--c-bg);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
  transition: box-shadow 0.45s var(--ease-out);
}
.case-card:hover { box-shadow: 0 26px 60px rgba(0, 0, 0, 0.18); }
.case-media { position: absolute; inset: 0; overflow: hidden; }
.case-media::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.62), rgba(0, 0, 0, 0.22) 42%, rgba(0, 0, 0, 0.06) 72%);
}
.case-media .case-img { width: 100%; height: 100%; object-fit: cover; display: block; }
.case-glyph {
  position: absolute; inset: 0;
  display: grid; place-items: center;
  font-size: 96px; font-weight: 700;
  color: rgba(255, 255, 255, 0.18);
  font-family: var(--f-display);
}
.case-info {
  position: absolute; left: 18px; right: 18px; bottom: 18px; z-index: 2;
  display: flex; flex-direction: column; align-items: flex-start;
}
.case-info h3 {
  font-size: 20px; font-weight: 600; letter-spacing: 1px; color: #fff;
}
.case-hover {
  width: 100%;
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transform: translateY(18px);
  transition:
    max-height 0.9s cubic-bezier(0.37, 0, 0.63, 1),
    opacity 0.8s ease-out 0.15s,
    transform 0.9s cubic-bezier(0.37, 0, 0.63, 1);
}
.case-hover p {
  margin-top: 10px;
  font-size: 14px; line-height: 1.7; color: rgba(255, 255, 255, 0.92);
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.case-card:hover .case-hover { max-height: 180px; opacity: 1; transform: translateY(0); }
.case-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}
.case-meta span {
  font-size: 12px;
  letter-spacing: 1px;
  color: #fff;
  background: rgba(255, 255, 255, 0.16);
  border: 1px solid rgba(255, 255, 255, 0.3);
  padding: 4px 10px;
  border-radius: 16px;
}
/* 触屏设备没有 hover，描述文字常显 */
@media (hover: none), (pointer: coarse) {
  .case-hover { max-height: none; opacity: 1; transform: none; }
}
/* 卡片内统计数据（ERP 页成功案例） */
.case-stats {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px;
  margin-bottom: 14px;
}
.case-stats .cs { text-align: left; }
.case-stats .cs strong { display: block; font-size: 17px; font-weight: 700; color: #fff; font-family: var(--f-display); text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5); }
.case-stats .cs span { display: block; font-size: 11px; color: rgba(255, 255, 255, 0.8); margin-top: 2px; text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5); }

@media (prefers-reduced-motion: reduce) {
  .case-card, .case-hover { transition: none; }
  .case-card:hover .case-hover { opacity: 1; max-height: 180px; transform: none; }
}