body,
html {
  font-family: "Open Sans", sans-serif;
  text-rendering: optimizeLegibility !important;
  -webkit-font-smoothing: antialiased !important;
  color: #777;
  font-weight: 400;
  width: 100% !important;
  height: 100% !important;
}
h2,
h3,
h4 {
  font-family: "Raleway", sans-serif;
}
h2 {
  text-transform: uppercase;
  margin: 0 0 20px;
  font-weight: 800;
  font-size: 36px;
  color: #333;
}
h3 {
  font-size: 20px;
  font-weight: 600;
  color: #333;
}
h4 {
  font-size: 18px;
  color: #333;
  font-weight: 600;
}
h5 {
  text-transform: uppercase;
  font-weight: 700;
  line-height: 20px;
}
p {
  font-size: 15px;
}
p.intro {
  margin: 12px 0 0;
  line-height: 24px;
}
a {
  color: #608dfd;
  font-weight: 400;
}
a:hover,
a:focus {
  text-decoration: none;
  color: #608dfd;
}
ul,
ol {
  list-style: none;
}
ul,
ol {
  padding: 0;
  webkit-padding: 0;
  moz-padding: 0;
}
hr {
  height: 2px;
  width: 70px;
  text-align: center;
  position: relative;
  background: #1e7a46;
  margin-bottom: 20px;
  border: 0;
}
/* Navigation */
#menu {
  padding: 15px;
  transition: all 0.8s;
}
#menu.navbar-default {
  background-color: #fff;
  border-color: rgba(231, 231, 231, 0);
  box-shadow: 0 0 10px rgba(0, 0, 0, 0.15);
}
#menu a.navbar-brand {
  font-family: "Raleway", sans-serif;
  font-size: 24px;
  font-weight: 700;
  color: #333;
  text-transform: uppercase;
}
#menu.navbar-default .navbar-nav > li > a {
  font-family: "Lato", sans-serif;
  text-transform: uppercase;
  color: #555;
  font-size: 15px;
  font-weight: 400;
  padding: 8px 2px;
  border-radius: 0;
  margin: 9px 20px 0;
}
#menu.navbar-default .navbar-nav > li > a:after {
  display: block;
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 2px;
  background: linear-gradient(to right, #6372ff 0%, #5ca9fb 100%);
  content: "";
  transition: width 0.2s;
}
#menu.navbar-default .navbar-nav > li > a:hover:after {
  width: 100%;
}
.navbar-default .navbar-nav > .active > a,
.navbar-default .navbar-nav > .active > a:hover,
.navbar-default .navbar-nav > .active > a:focus {
  background-color: transparent;
}
.navbar-default .navbar-nav > .active > a:after,
.navbar-default .navbar-nav > .active > a:hover:after,
.navbar-default .navbar-nav > .active > a:focus:after {
  display: block !important;
  position: absolute !important;
  left: 0 !important;
  bottom: -1px !important;
  width: 100% !important;
  height: 2px !important;
  background: linear-gradient(to right, #6372ff 0%, #5ca9fb 100%) !important;
  content: "" !important;
  transition: width 0.2s !important;
}
.navbar-toggle {
  border-radius: 0;
}
.navbar-default .navbar-toggle:hover,
.navbar-default .navbar-toggle:focus {
  background-color: #fff;
  border-color: #608dfd;
}
.navbar-default .navbar-toggle:hover > .icon-bar {
  background-color: #608dfd;
}
.section-title {
  margin-bottom: 70px;
}
.section-title h2 {
  position: relative;
  margin-top: 10px;
  margin-bottom: 15px;
  padding-bottom: 15px;
}
.section-title h2::after {
  position: absolute;
  content: "";
  background: linear-gradient(to right, #5ca9fb 0%, #6372ff 100%);
  height: 4px;
  width: 60px;
  bottom: 0;
  margin-left: -30px;
  left: 50%;
}
.section-title p {
  font-size: 18px;
}
@keyframes pulse {
  0% {
    box-shadow:
            0 0 0 0 rgba(255, 0, 0, 0.9),
            0 0 10px 5px rgba(255, 0, 0, 0.7);
  }
  70% {
    box-shadow:
            0 0 20px 20px rgba(255, 0, 0, 0),
            0 0 10px 10px rgba(255, 0, 0, 0);
  }
  100% {
    box-shadow:
            0 0 0 0 rgba(255, 0, 0, 0),
            0 0 0 0 rgba(255, 0, 0, 0);
  }
}

.btn-custom {
  font-family: "Raleway", sans-serif;
  text-transform: uppercase;
  color: #fff;
  background-color: #5ca9fb;
  background-image: linear-gradient(to right, red 0%, darkred 100%);
  padding: 14px 34px;
  letter-spacing: 1px;
  margin: 0;
  font-size: 18px;
  font-weight: 1000;
  border-radius: 25px;
  border: 0;
  transition: all 0.3s ease;
  animation: pulse 3.0s infinite;
  animation-timing-function: ease-in-out;
  margin-top: -100px;  /* 负值往上移动 */
}

.btn-custom:hover {
  background-color: #6372ff;
  cursor: pointer;
  /* 鼠标悬停时可以停止呼吸灯 */
  animation-play-state: paused;
}

.btn-custom:hover,
.btn-custom:focus,
.btn-custom.focus,
.btn-custom:active,
.btn-custom.active {
  color: #fff;
  background-image: none;
  background-color: #6372ff;
}
.btn:active,
.btn.active {
  background-image: none;
  outline: 0;
  -webkit-box-shadow: none;
  box-shadow: none;
}
a:focus,
.btn:focus,
.btn:active:focus,
.btn.active:focus,
.btn.focus,
.btn:active.focus,
.btn.active.focus {
  outline: none;
  outline-offset: none;
}
/* Header Section */
.intro {
  height: 650px;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: table;
  padding: 0;
  background: url(../img/cella_intro.jpeg) center center no-repeat;
  background-color: gold;
  background-size: contain;
  background-repeat: no-repeat;
  background-position: center;
}


.intro .overlay {
  background: rgba(0, 0, 0, 0);
}

/* 资源区背景和内边距 */
.resources-section {
  padding: 60px 0;
  background-color: #f9f9f9;
}

/* 资源区大标题，左对齐加粗 */
.resource-section-title {
  margin-bottom: 30px;
  font-weight: 900;
  font-size: 24px;
  color: #000;
  text-align: left;
}

/* 资源项目容器：flex布局，允许换行，左对齐，行间距和列间距 */
.resource-items {
  display: flex;
  flex-wrap: wrap;
  gap: 20px 20px;  /* row-gap column-gap */
  justify-content: flex-start; /* 左对齐 */
}

/* 资源项目：固定宽度，最多4个/行 */
.resource-item {
  flex: 0 0 auto;
  width: 250px;   /* 固定宽度，保证图片大小不变 */
  box-sizing: border-box;
  text-align: left;
}

/* 链接块填满容器，方便点击 */
.resource-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

/* 资源标题，字体加粗，固定高度保持图片行对齐 */
.resource-title {
  font-weight: 800;
  font-size: 16px;
  margin-bottom: 8px;
  min-height: 50px;
  overflow: hidden;
  color: #222;
}

/* 图片，固定尺寸，保持比例裁剪，不拉伸 */
.resource-image {
  width: 100%;
  height: 150px;
  object-fit: cover;
  border-radius: 8px;
}

/* Presenter样式 */
.resource-presenter {
  margin-top: 10px;
  font-size: 16px;
  line-height: 1.4;
  color: #444;
  font-weight: 600;
}

/* 响应式调整 */

/* 屏幕宽度小于1024px时，最多3个/行 */
@media (max-width: 1024px) {
  .resource-item {
    width: 32%;
  }
}

/* 屏幕宽度小于768px时，最多2个/行 */
@media (max-width: 768px) {
  .resource-item {
    width: 48%;
  }
}

/* 屏幕宽度小于480px时，1个/行 */
@media (max-width: 480px) {
  .resource-item {
    width: 100%;
  }
}



.intro h1 {
  font-family: "Raleway", sans-serif;
  color: #fff;
  font-size: 82px;
  font-weight: 700;
  text-transform: uppercase;
  margin-top: 0;
  margin-bottom: 10px;
}
.intro h1 span {
  font-weight: 800;
  color: #5ca9fb;
}
.intro p {
  color: #fff;
  font-size: 22px;
  font-weight: 300;
  line-height: 30px;
  margin: 0 auto;
  margin-bottom: 60px;
}
header .intro-text {
  padding-top: 500px;
  text-align: center;
}
/* Features Section */
#features {
  background: #f6f6f6;
  position: relative;
  padding-top: 100px;     /* 导航栏高度，根据你的导航栏实际高度调整 */
  /*margin-top: -80px;     !* 负外边距，抵消内边距 *!*/
}
#features i.fa {
  font-size: 38px;
  margin-bottom: 20px;
  transition: all 0.5s;
  color: #fff;
  width: 100px;
  height: 100px;
  padding: 30px 0;
  border-radius: 50%;
  background: linear-gradient(to right, #6372ff 0%, #5ca9fb 100%);
  box-shadow: 10px 10px 10px rgba(0, 0, 0, 0.05);
}
/* About Section */
#about {
  padding: 100px 0;
}
#about h3 {
  font-size: 22px;
  margin: 0 0 20px;
}
#about h2 {
  position: relative;
  margin-bottom: 15px;
  padding-bottom: 15px;
}
#about h2::after {
  position: absolute;
  content: "";
  background: linear-gradient(to right, #5ca9fb 0%, #6372ff 100%);
  height: 4px;
  width: 60px;
  bottom: 0;
  left: 0;
}
#about .about-text li {
  margin-bottom: 6px;
  margin-left: 6px;
  list-style: none;
  padding: 0;
}
#about .about-text li:before {
  content: "\f00c";
  font-family: "FontAwesome";
  color: #5ca9fb;
  font-size: 11px;
  font-weight: 300;
  padding-right: 8px;
}
#about img {
  width: 520px;
  margin-top: 10px;
  background: #fff;
  border-right: 0;
  box-shadow: 0 0 50px rgba(0, 0, 0, 0.06);
}
#about p {
  line-height: 24px;
  margin: 30px 0;
}
/* Services Section */
#services {
  padding: 100px 0;
  background: linear-gradient(to right, #6372ff 0%, #5ca9fb 100%);
  color: #fff;
}
#services .service-desc {
  margin: 10px 10px 20px;
}
#services h2 {
  color: #fff;
}
#services .section-title h2::after {
  position: absolute;
  content: "";
  background: rgba(255, 255, 255, 0.3);
  height: 4px;
  width: 60px;
  bottom: 0;
  margin-left: -30px;
  left: 50%;
}
#services i.fa {
  font-size: 42px;
  width: 120px;
  height: 120px;
  padding: 40px 0;
  background: linear-gradient(to right, #6372ff 0%, #5ca9fb 100%);
  border-radius: 50%;
  color: #fff;
  box-shadow: 10px 10px 10px rgba(0, 0, 0, 0.05);
}
#services h3 {
  font-weight: 500;
  padding: 5px 0;
  color: #fff;
}
#services p {
  color: rgba(255, 255, 255, 0.75);
}
#services .service-desc {
  margin-bottom: 40px;
}
/* Portfolio Section */
#portfolio {
  padding: 100px 0;
}
.portfolio-item {
  margin: 1px -15px 0 -14px;
  padding: 0;
}
.portfolio-item .hover-bg {
  overflow: hidden;
  position: relative;
  margin: 0;
}
.hover-bg .hover-text {
  position: absolute;
  text-align: center;
  margin: 0 auto;
  color: #fff;
  background: linear-gradient(
    to right,
    rgba(99, 114, 255, 0.8) 0%,
    rgba(92, 169, 251, 0.8) 100%
  );
  padding: 30% 0 0;
  height: 100%;
  width: 100%;
  opacity: 0;
  transition: all 0.5s;
}
.hover-bg .hover-text > h4 {
  opacity: 0;
  color: #fff;
  -webkit-transform: translateY(100%);
  transform: translateY(100%);
  transition: all 0.3s;
  font-size: 18px;
  letter-spacing: 1px;
  font-weight: 500;
  text-transform: uppercase;
}
.hover-bg:hover .hover-text > h4 {
  opacity: 1;
  -webkit-backface-visibility: hidden;
  -webkit-transform: translateY(0);
  transform: translateY(0);
}
.hover-bg:hover .hover-text {
  opacity: 1;
}
/* Testimonials Section */
#testimonials {
  padding: 100px 0;
  background: #f6f6f6;
}
#testimonials i {
  color: #e6e6e6;
  font-size: 32px;
  margin-bottom: 20px;
}
.testimonial {
  position: relative;
  padding: 20px;
}
.testimonial-image {
  float: left;
  margin-right: 15px;
}
.testimonial-image,
.testimonial-image img {
  display: block;
  width: 64px;
  height: 64px;
  border-radius: 50%;
}
.testimonial-content {
  position: relative;
  overflow: hidden;
}
.testimonial-content p {
  margin-bottom: 0;
  font-size: 14px;
  font-style: italic;
}
.testimonial-meta {
  margin-top: 10px;
  font-size: 15px;
  font-weight: 600;
  color: #666;
}
/* Team Section */
#team {
  padding: 100px 0;
}
#team h4 {
  margin: 5px 0;
}
#team .team-img {
  width: 250px;      /* 固定宽度 */
  height: 250px;     /* 固定高度 */
  object-fit: cover; /* 保持比例，超出裁剪 */
  border-radius: 8px; /* 可选，圆角 */
  display: block;
  margin: 0 auto;
}
#team .thumbnail {
  background: transparent;
  border: 0;
}
#team .thumbnail .caption {
  padding: 10px 0 0;
  color: #888;
}
/* Contact Section */
#contact {
  padding: 100px 0 60px;
  background: linear-gradient(to right, #f7d04b 0%, #f1bc23 100%);
  color: rgba(30, 30, 30, 0.9);
}


#contact .section-title {
  margin-bottom: 40px;
}
#contact .section-title p {
  font-size: 16px;
}
#contact h2 {
  color: #fff;
  margin-top: 10px;
  margin-bottom: 15px;
  padding-bottom: 15px;
}
#contact .section-title h2::after {
  position: absolute;
  content: "";
  background: rgba(255, 255, 255, 0.3);
  height: 4px;
  width: 60px;
  bottom: 0;
  left: 30px;
}
#contact h3 {
  color: #fff;
  margin-top: 80px;
  margin-bottom: 25px;
  padding-bottom: 20px;
  font-weight: 400;
}
#contact form {
  padding-top: 20px;
}
#contact .text-danger {
  color: #cc0033;
  text-align: left;
}
#contact .btn-custom {
  margin: 30px 0;
  background: transparent;
  border: 2px solid #fff;
}
#contact .btn-custom:hover {
  color: #1f386e;
  background: #fff;
}
label {
  font-size: 12px;
  font-weight: 400;
  font-family: "Open Sans", sans-serif;
  float: left;
}
#contact .form-control {
  display: block;
  width: 100%;
  padding: 6px 12px;
  font-size: 16px;
  line-height: 1.42857143;
  color: #444;
  background-color: #fff;
  background-image: none;
  border: 1px solid #ddd;
  border-radius: 0;
  -webkit-box-shadow: none;
  box-shadow: none;
  -webkit-transition: none;
  -o-transition: none;
  transition: none;
}
#contact .form-control:focus {
  border-color: #999;
  outline: 0;
  -webkit-box-shadow: transparent;
  box-shadow: transparent;
}
.form-control::-webkit-input-placeholder {
  color: #777;
}
.form-control:-moz-placeholder {
  color: #777;
}
.form-control::-moz-placeholder {
  color: #777;
}
.form-control:-ms-input-placeholder {
  color: #777;
}
#contact .contact-item {
  margin: 20px 0;
}
#contact .contact-item span {
  color: rgba(255, 255, 255, 1);
  margin-bottom: 10px;
  display: block;
}
#contact .contact-item i.fa {
  margin-right: 10px;
}
#contact .social {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 50px;
  margin-top: 50px;
  text-align: center;
}
#contact .social ul li {
  display: inline-block;
  margin: 0 20px;
}
#contact .social i.fa {
  font-size: 22px;
  width: 48px;
  height: 48px;
  padding: 12px 0;
  border: 2px solid #fff;
  color: #fff;
  border-radius: 50%;
  transition: all 0.3s;
}
#contact .social i.fa:hover {
  color: #608dfd;
  background: #fff;
}
/* Footer Section*/
#footer {
  background: #f6f6f6;
  padding: 30px 0;
}
#footer p {
  color: #888;
  font-size: 14px;
}
#footer a {
  color: #608dfd;
}
#footer a:hover {
  border-bottom: 2px solid #608dfd;
}

@media (max-width: 768px) {
  #about img {
    margin: 50px 0;
  }
}
.features-row {
  display: flex;
  flex-wrap: wrap;       /* 允许换行 */
  justify-content: center; /* 居中排列，可改为flex-start靠左 */
  gap: 20px;             /* 元素间距 */
  padding: 10px 0;
  box-sizing: border-box;
}

/* 每个成员项 */
.features-row > div {
  flex: 0 0 18%;         /* 默认5个左右，每个占18%宽度 */
  max-width: 18%;
  box-sizing: border-box;
  text-align: center;
}

/* 窗口小于 1200px，4列 */
@media (max-width: 1200px) {
  .features-row > div {
    flex: 0 0 22%;       /* 4列 */
    max-width: 22%;
  }
}

/* 窗口小于 992px，3列 */
@media (max-width: 992px) {
  .features-row > div {
    flex: 0 0 30%;
    max-width: 30%;
  }
}

/* 窗口小于 768px，2列 */
@media (max-width: 768px) {
  .features-row > div {
    flex: 0 0 45%;
    max-width: 45%;
  }
}

/* 窗口小于 480px，1列 */
@media (max-width: 480px) {
  .features-row > div {
    flex: 0 0 100%;
    max-width: 100%;
  }
}

.intro-text {
  max-width: 900px;
  margin: 0 auto 40px;
  font-size: 20px;
  color: black;
  line-height: 1.6;
  text-align: center;
}
.feature-title {
  font-size: 19px;      /* 你想要的字体大小 */
  font-weight: 700;     /* 加粗 */
  color: #222;          /* 颜色，也可以改 */
  margin-bottom: 10px;  /* 标题和下面文字间距 */
}
.intro-paragraph {
  font-size: 18px;                     /* 字体大小 */
  font-weight: 400;                    /* 字体粗细 */
  color: #333;                        /* 文字颜色 */
  line-height: 1.6;                   /* 行高，提升可读性 */
}
.paragraph-style {
  font-size: 15px;
}