@charset "utf-8";
/* ==========================================================================
   首页 - 我们的优势（gdAdv 新版）
   品牌主色 #c10326 ｜ 依赖：无 ｜ 作用域：.gdAdv
   ========================================================================== */

.gdAdv {
    position: relative;
    width: 100%;
    padding: 80px 0 90px;
    background: #f7f8fa;
    overflow: hidden;
}

/* 顶部三段色条 */
.gdAdv::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #c10326 0 34%, #e4e6ea 34% 66%, #c10326 66% 100%);
}

/* --------------------------- 标题区 --------------------------- */
.gdAdv_head {
    position: relative;
    text-align: center;
    margin-bottom: 58px;
    opacity: 0;
    transform: translateY(28px);
    transition: opacity .9s ease, transform .9s cubic-bezier(.22, .61, .36, 1);
}

.gdAdv_head.in {
    opacity: 1;
    transform: none;
}

.gdAdv_badge {
    position: relative;
    width: 64px;
    height: 64px;
    margin: 0 auto 26px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.gdAdv_badge::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 64px;
    height: 64px;
    background: #c10326;
    transform: rotate(45deg) scale(0);
    box-shadow: 0 10px 24px rgba(193, 3, 38, .22);
    transition: transform .7s cubic-bezier(.34, 1.56, .64, 1);
}

.gdAdv_head.in .gdAdv_badge::before {
    transform: rotate(45deg) scale(1);
}

.gdAdv_badge img {
    position: relative;
    z-index: 1;
    max-width: 36px;
    max-height: 36px;
    width: auto;
    height: auto;
}

.gdAdv_en {
    font-size: 14px;
    line-height: 1;
    letter-spacing: 5px;
    color: #c10326;
    text-transform: uppercase;
    font-weight: bold;
    margin: 0 0 14px;
    padding-left: 5px;
}

.gdAdv_tt {
    font-size: 36px;
    line-height: 1.3;
    color: #1a1a1a;
    font-weight: bold;
    letter-spacing: 1px;
    margin: 0;
}

.gdAdv_bar {
    position: relative;
    display: block;
    width: 64px;
    height: 3px;
    background: #c10326;
    margin: 20px auto 0;
    transform: scaleX(0);
    transform-origin: center;
    transition: transform .85s .25s cubic-bezier(.22, .61, .36, 1);
}

.gdAdv_bar::before,
.gdAdv_bar::after {
    content: '';
    position: absolute;
    top: 1px;
    height: 1px;
    width: 26px;
    background: #dcdcdc;
}

.gdAdv_bar::before { right: 100%; margin-right: 12px; }
.gdAdv_bar::after  { left: 100%; margin-left: 12px; }

.gdAdv_head.in .gdAdv_bar { transform: scaleX(1); }

/* --------------------------- 卡片列表 --------------------------- */
.gdAdv_list {
    display: flex;
    flex-wrap: wrap;
    gap: 24px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.gdAdv_item {
    position: relative;
    flex: 0 0 calc((100% - 72px) / 4);
    box-sizing: border-box;
    min-height: 252px;
    padding: 40px 30px 36px;
    background: #fff;
    border: 1px solid #ececec;
    overflow: hidden;
    list-style: none;
    opacity: 0;
    transform: translateY(48px);
    transition: opacity .85s ease,
                transform .85s cubic-bezier(.22, .61, .36, 1),
                box-shadow .4s ease,
                border-color .4s ease;
}

.gdAdv_item.in {
    opacity: 1;
    transform: translateY(0);
}

.gdAdv_item.in:hover {
    transform: translateY(-8px);
    box-shadow: 0 22px 46px rgba(15, 20, 40, .10);
    border-color: #f2ccd4;
}

/* 顶部红条：hover 由左展开 */
.gdAdv_item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 3px;
    z-index: 3;
    background: linear-gradient(90deg, #c10326, #e8405f);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform .5s cubic-bezier(.22, .61, .36, 1);
}

.gdAdv_item:hover::before { transform: scaleX(1); }

/* 鼠标光晕（跟随光标） */
.gdAdv_item::after {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    opacity: 0;
    pointer-events: none;
    transition: opacity .45s ease;
    background: radial-gradient(300px circle at var(--mx, 50%) var(--my, 0%),
                rgba(193, 3, 38, .075), transparent 62%);
}

.gdAdv_item:hover::after { opacity: 1; }

/* 描边水印大数字 */
.gdAdv_bigno {
    position: absolute;
    right: 8px;
    top: 4px;
    z-index: 1;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 92px;
    line-height: 1;
    font-weight: 900;
    letter-spacing: -3px;
    color: #f2f3f5;
    pointer-events: none;
    -webkit-user-select: none;
    user-select: none;
    transition: color .45s ease, transform .45s ease, opacity .45s ease;
}

@supports (-webkit-text-stroke: 1px #000) {
    .gdAdv_bigno { color: transparent; -webkit-text-stroke: 1px #e9eaee; }
}

.gdAdv_item:hover .gdAdv_bigno {
    opacity: .95;
    transform: translateY(-4px) scale(1.05);
}

@supports (-webkit-text-stroke: 1px #000) {
    .gdAdv_item:hover .gdAdv_bigno { -webkit-text-stroke: 1px rgba(193, 3, 38, .32); }
}

/* 序号菱形 */
.gdAdv_dot {
    position: relative;
    display: block;
    width: 46px;
    height: 46px;
    margin: 0 0 30px 5px;
    background: #c10326;
    transform: rotate(45deg);
    z-index: 2;
    transition: background .4s ease, box-shadow .4s ease;
}

.gdAdv_dot i {
    display: block;
    width: 100%;
    height: 100%;
    line-height: 46px;
    text-align: center;
    color: #fff;
    font-size: 15px;
    font-weight: bold;
    font-style: normal;
    letter-spacing: .5px;
    transform: rotate(-45deg);
}

.gdAdv_item.in:hover .gdAdv_dot {
    background: #a00220;
    box-shadow: 0 0 0 9px rgba(193, 3, 38, .08);
}

/* 标题 */
.gdAdv_h3 {
    position: relative;
    z-index: 2;
    font-size: 20px;
    line-height: 1.4;
    color: #1a1a1a;
    font-weight: bold;
    margin: 0 0 14px;
    transition: color .35s ease;
}

.gdAdv_item.in:hover .gdAdv_h3 { color: #c10326; }

/* 描述 */
.gdAdv_txt {
    position: relative;
    z-index: 2;
    font-size: 15px;
    line-height: 28px;
    color: #7d7d7d;
    margin: 0;
    word-break: break-all;
}

/* --------------------------- 响应式 --------------------------- */
@media (max-width: 1560px) {
    .gdAdv { padding: 70px 0 80px; }
    .gdAdv_tt { font-size: 34px; }
    .gdAdv_bigno { font-size: 84px; }
}

@media (max-width: 1366px) {
    .gdAdv_list { gap: 20px; }
    .gdAdv_item { flex: 0 0 calc((100% - 60px) / 4); padding: 34px 24px 32px; min-height: 236px; }
    .gdAdv_h3 { font-size: 18px; }
    .gdAdv_txt { font-size: 14px; line-height: 26px; }
    .gdAdv_dot { width: 42px; height: 42px; margin-bottom: 26px; }
    .gdAdv_dot i { line-height: 42px; font-size: 14px; }
    .gdAdv_bigno { font-size: 76px; }
}

@media (max-width: 1200px) {
    .gdAdv { padding: 64px 0 70px; }
    .gdAdv_head { margin-bottom: 44px; }
    .gdAdv_tt { font-size: 30px; }
    .gdAdv_list { gap: 20px; }
    .gdAdv_item { flex: 0 0 calc((100% - 20px) / 2); }
}

@media (max-width: 920px) {
    .gdAdv { padding: 56px 0 60px; }
    .gdAdv_tt { font-size: 26px; }
    .gdAdv_en { font-size: 13px; letter-spacing: 4px; }
    .gdAdv_badge { width: 56px; height: 56px; margin-bottom: 22px; }
    .gdAdv_badge::before { width: 56px; height: 56px; }
    .gdAdv_badge img { max-width: 32px; max-height: 32px; }
    .gdAdv_bigno { font-size: 70px; }
}

@media (max-width: 767px) {
    .gdAdv { padding: 46px 0 50px; }
    .gdAdv_head { margin-bottom: 34px; }
    .gdAdv_tt { font-size: 23px; }
    .gdAdv_item { flex: 0 0 100%; min-height: 0; padding: 32px 24px 30px; }
    .gdAdv_bigno { font-size: 76px; right: 12px; }
}