/* ============================================================
   index.css — 商城首页专属样式
   依赖：variables.css, common.css
   ============================================================ */

/* -------------------- 1. 顶部容器背景 -------------------- */
.site-header--mall {
    border-bottom: 1px solid var(--color-border);
}

/* -------------------- 2. Banner 区域 -------------------- */
.banner-area {
    background: var(--color-bg-white);
    border-radius: var(--radius-lg);
    padding: 16px 12px;
}

/* -------------------- 3. 左侧产品分类 -------------------- */
.category-panel__title {
    font-size: var(--font-size-lg);
    font-weight: bold;
    color: var(--color-text);
    line-height: 2;
    display: flex;
    align-items: center;
    gap: 8px;
}

.category-panel__icon {
    width: 26px;
    height: 26px;
}

.category-panel__list {
    list-style: none;
    padding: 0;
    margin: 0;
    position: relative;
}

.category-panel__item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    transition: color 0.2s;
    position: relative;
}

.category-panel__item:hover .category-panel__label,
.category-panel__item:hover .category-panel__arrow {
    color: var(--color-primary);
}

.category-panel__item-inner {
    display: flex;
    align-items: center;
    gap: 8px;
}

.category-panel__item-icon {
    width: 26px;
    height: 26px;
    transition: filter 0.2s;
    flex-shrink: 0;
}

/* hover 整个链条时，icon 随着变色 */
.category-panel__item:hover .category-panel__item-icon {
    filter: invert(47%) sepia(96%) saturate(400%) hue-rotate(140deg) brightness(90%);
}

.category-panel__label {
    font-size: var(--font-size-base);
    color: var(--color-text);
    line-height: 2.4;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 130px;
    transition: color 0.2s;
}

.category-panel__arrow {
    font-size: var(--font-size-xs);
    color: var(--color-text);
    transition: color 0.2s;
    flex-shrink: 0;
}

/* 弹窗 */
.category-popup {
    position: absolute;
    top: 0;
    left: 100%;
    width: 720px;
    z-index: 1000;
    visibility: hidden;
    opacity: 0;
    transition: opacity 0.25s ease, visibility 0.25s ease;
    padding-left: 8px;
}

.category-panel__item:hover .category-popup {
    visibility: visible;
    opacity: 1;
}

.category-popup__inner {
    background: var(--color-bg-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 20px 24px;
    font-size: var(--font-size-base);
    color: var(--color-text);
    line-height: 1.6;
}

.category-popup__heading {
    font-size: 18px;
    font-weight: bold;
    color: var(--color-text);
    margin: 0 0 8px;
}

.category-popup__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 12px;
    margin-bottom: 16px;
}

.category-popup__tags a {
    font-size: var(--font-size-base);
    color: var(--color-text);
    line-height: 2;
}

.category-popup__tags a:hover {
    color: var(--color-primary);
}

/* -------------------- 4. Banner 轮播 -------------------- */
.banner-carousel img {
    width: 100%;
    height: 320px;
    object-fit: cover;
    border-radius: var(--radius-md);
}

/* -------------------- 5. 快捷导航（Banner 下方四格） -------------------- */
.quick-nav-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 12px;
    margin-top: 12px;
}

.quick-nav-item {
    text-align: center;
    text-decoration: none;
    color: var(--color-text);
    background: var(--color-bg-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    transition: var(--transition-base);
    display: flex;
    flex-direction: column;
}

.quick-nav-item:hover {
    color: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.quick-nav-item__img-wrap {
    background: linear-gradient(135deg, var(--color-primary-lightest) 0%, var(--color-primary-light) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    height: 110px;
    padding: 16px;
    transition: var(--transition-base);
}

.quick-nav-item:hover .quick-nav-item__img-wrap {
    background: linear-gradient(135deg, var(--color-primary-light) 0%, #D6E1F3 100%);
}

.quick-nav-item__img-wrap img {
    max-height: 64px;
    max-width: 100%;
    object-fit: contain;
    margin: 0 auto;
    transition: transform 0.3s ease;
}

.quick-nav-item:hover .quick-nav-item__img-wrap img {
    transform: scale(1.08);
}

.quick-nav-item__label {
    background: var(--color-bg-white);
    padding: 14px 8px;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.quick-nav-item:hover .quick-nav-item__label {
    color: var(--color-primary);
}

/* -------------------- 6. 右侧推荐产品（For You） -------------------- */
.for-you-panel__title {
    font-size: var(--font-size-md);
    font-weight: bold;
    color: var(--color-text);
    line-height: 2;
}

.for-you-panel__more {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    gap: 4px;
}

.for-you-panel__more:hover {
    color: var(--color-primary-dark);
}

.for-you-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 14px;
}

.for-you-item__img {
    width: 56px;
    height: 56px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.for-you-item__name {
    font-size: var(--font-size-sm);
    color: var(--color-text);
    line-height: 1.4;
    margin-bottom: 4px;
}

.for-you-item:hover .for-you-item__name {
    color: var(--color-primary);
}

.for-you-item__price {
    font-size: var(--font-size-sm);
    font-weight: bold;
    color: var(--color-text);
    margin-bottom: 2px;
}

.for-you-item__moq {
    font-size: 11px;
    color: var(--color-text-muted);
}

/* -------------------- 7. 广告条 -------------------- */
.ad-bar {
    position: relative;
    background:
        radial-gradient(circle at 85% 50%, rgba(255, 106, 0, 0.18) 0%, transparent 45%),
        radial-gradient(circle at 15% 100%, rgba(43, 92, 176, 0.6) 0%, transparent 50%),
        linear-gradient(135deg, #0F2557 0%, #1A3A7E 55%, #1F4A95 100%);
    padding: 48px 56px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 24px;
    overflow: hidden;
    box-shadow: var(--shadow-brand);
}

.ad-bar::before {
    content: "";
    position: absolute;
    top: -40%;
    right: -10%;
    width: 380px;
    height: 380px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.08) 0%, transparent 70%);
    pointer-events: none;
}

.ad-bar__text {
    font-size: 28px;
    font-weight: var(--font-weight-bold);
    color: #fff;
    line-height: 1.3;
    flex: 1;
    min-width: 280px;
    letter-spacing: -0.01em;
    position: relative;
    z-index: 1;
}

.ad-bar__btn {
    position: relative;
    z-index: 1;
    background: var(--color-accent);
    color: #fff;
    border: none;
    border-radius: var(--radius-pill);
    padding: 14px 32px;
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    white-space: nowrap;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: var(--shadow-accent);
    transition: var(--transition-base);
}

.ad-bar__btn::after {
    content: "→";
    font-size: 20px;
    transition: transform 0.25s ease;
}

.ad-bar__btn:hover {
    background: var(--color-accent-dark);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 14px 28px rgba(255, 106, 0, 0.4);
}

.ad-bar__btn:hover::after {
    transform: translateX(4px);
}

/* -------------------- 8. 新品发布 + 排行榜 -------------------- */
.product-section-box {
    background: var(--color-bg-white);
    border-radius: var(--radius-lg);
    padding: 20px;
    height: 100%;
}

/* 排行榜 */
.rank-list-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
    position: relative;
}

.rank-badge {
    position: absolute;
    top: 0;
    left: 0;
    width: 22px;
    height: 26px;
    background: #EDBD00;
    clip-path: polygon(0% 0%, 100% 0%, 0% 100%);
    display: flex;
    align-items: flex-start;
    justify-content: flex-start;
    padding: 2px 0 0 3px;
    font-size: 12px;
    font-weight: bold;
    color: #fff;
    z-index: 1;
}

.rank-list-item__img {
    width: 80px;
    height: 80px;
    object-fit: cover;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.rank-list-item__name {
    font-size: 13px;
    color: var(--color-text);
    line-height: 1.4;
    margin-bottom: 4px;
}

.rank-list-item__price {
    font-size: 13px;
    font-weight: bold;
    color: var(--color-text);
    margin-bottom: 2px;
}

.rank-list-item__moq {
    font-size: 11px;
    color: var(--color-text-muted);
}

/* -------------------- 9. 产品大分类模块 -------------------- */
.category-showcase {
    display: flex;
    gap: 12px;
    /* big-category 与 small-categories 之间间距 */
}

.big-category-card {
    flex-shrink: 0;
    width: 210px;
    min-height: 300px;
    background: #f8f9fa center/cover no-repeat;
    border-radius: var(--radius-md);
    padding: 20px;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    transition: var(--transition-base);
}

.big-category-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
}

.big-category-card__title {
    font-size: 22px;
    font-weight: bold;
    color: var(--color-text);
    line-height: 1.4;
    margin-bottom: 16px;
    position: relative;
    z-index: 2;
}

.small-categories {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    flex: 1;
}

.small-category-card {
    height: 150px;
    background: #fff center/cover no-repeat;
    padding: 12px;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    transition: var(--transition-base);
}

.small-category-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.small-category-card:hover .category-tag {
    color: var(--color-primary);
}

.category-tag {
    font-size: 13px;
    color: var(--color-text);
    font-weight: 500;
    padding: 4px 8px;
    display: inline-block;
    background: rgba(255, 255, 255, 0.85);
    border-radius: var(--radius-sm);
    position: relative;
    z-index: 2;
    transition: color 0.2s;
}

/* -------------------- 10. Steel Mill Resources -------------------- */
.steel-mill-card {
    background: var(--color-bg-white);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    box-shadow: var(--shadow-sm);
}

.steel-mill-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 24px;
    align-items: center;
    justify-items: center;
}

.steel-mill-grid__img {
    width: auto;
    max-height: 60px;
    object-fit: contain;
    filter: grayscale(0.5) opacity(0.75);
    transition: var(--transition-base);
    cursor: pointer;
}

.steel-mill-grid__img:hover {
    filter: grayscale(0) opacity(1);
    transform: scale(1.05);
}

@media (max-width: 991px) {
    .steel-mill-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 575px) {
    .steel-mill-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* -------------------- 11. Request for Quotations (RFQ) Module -------------------- */
.rfq-module {
    position: relative;
    background:
        radial-gradient(circle at 90% 10%, rgba(255, 106, 0, 0.25) 0%, transparent 50%),
        radial-gradient(circle at 10% 90%, rgba(43, 92, 176, 0.5) 0%, transparent 50%),
        linear-gradient(135deg, #081933 0%, #0F2557 50%, #1A3A7E 100%);
    border-radius: var(--radius-lg);
    padding: 56px 48px;
    min-height: 400px;
    overflow: hidden;
    box-shadow: var(--shadow-brand);
}

.rfq-module::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(90deg, rgba(255,255,255,0.035) 1px, transparent 1px),
        linear-gradient(rgba(255,255,255,0.035) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.4) 0%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, rgba(0,0,0,0.4) 0%, transparent 70%);
    pointer-events: none;
}

.rfq-module > .row { position: relative; z-index: 1; }

/* 左侧内容 */
.rfq-content__title {
    font-weight: bold;
    font-size: 30px;
    color: #FFFFFF;
    margin-bottom: 12px;
    line-height: 1.3;
}

.rfq-content__subtitle {
    font-weight: 400;
    font-size: 16px;
    color: #FFFFFF;
    margin-bottom: 20px;
    line-height: 1.5;
}

.rfq-content__btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: var(--color-accent);
    border-radius: var(--radius-pill);
    font-weight: var(--font-weight-semibold);
    font-size: var(--font-size-sm);
    color: #FFFFFF;
    padding: 12px 28px;
    text-decoration: none;
    transition: var(--transition-base);
    margin-bottom: 24px;
    box-shadow: var(--shadow-accent);
}

.rfq-content__btn::after {
    content: "→";
    transition: transform 0.25s ease;
}

.rfq-content__btn:hover {
    background: var(--color-accent-dark);
    color: #FFFFFF;
    transform: translateY(-2px);
    box-shadow: 0 14px 28px rgba(255, 106, 0, 0.4);
}

.rfq-content__btn:hover::after {
    transform: translateX(4px);
}

.rfq-features {
    list-style: none;
    padding: 0;
    margin: 0;
}

.rfq-features__item {
    font-weight: 400;
    font-size: 15px;
    color: rgba(255, 255, 255, 0.85);
    margin-bottom: 12px;
    position: relative;
    line-height: 1.6;
    padding-left: 26px;
}

.rfq-features__item::before {
    content: "✓";
    position: absolute;
    left: 0;
    top: 0;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--color-accent);
    color: #fff;
    font-size: 11px;
    font-weight: bold;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* 右侧表单 */
.rfq-form {
    background: #FFFFFF;
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.25);
}

.rfq-form__title {
    font-weight: var(--font-weight-bold);
    font-size: 26px;
    color: var(--color-text-strong);
    margin-bottom: 24px;
    text-align: left;
    letter-spacing: -0.01em;
}

.rfq-form__input,
.rfq-form__select {
    border: 1px solid #D9D9D9;
    border-radius: 4px;
    padding: 12px 16px;
    font-size: 14px;
    color: #333333;
    transition: border-color 0.2s;
}

.rfq-form__input:focus,
.rfq-form__select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 0.2rem rgba(0, 188, 212, 0.15);
}

.rfq-form__input::placeholder {
    color: #999999;
}

.rfq-form__select {
    max-width: 120px;
}

.rfq-form__submit {
    width: 100%;
    background: var(--color-accent);
    color: #FFFFFF;
    border: none;
    border-radius: var(--radius-pill);
    padding: 14px 24px;
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: var(--transition-base);
    box-shadow: var(--shadow-accent);
    letter-spacing: 0.01em;
}

.rfq-form__submit:hover {
    background: var(--color-accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 14px 28px rgba(255, 106, 0, 0.4);
}

/* 响应式 - 平板 */
@media (max-width: 991px) {
    .rfq-module {
        padding: 36px 28px;
        min-height: auto;
    }

    .rfq-content__title {
        font-size: 26px;
    }

    .rfq-content__subtitle {
        font-size: 15px;
    }

    .rfq-features__item {
        font-size: 15px;
    }
}

/* 响应式 - 移动端 */
@media (max-width: 767px) {
    .rfq-module {
        padding: 24px 20px;
    }

    .rfq-content__title {
        font-size: 22px;
        margin-bottom: 10px;
    }

    .rfq-content__subtitle {
        font-size: 14px;
        margin-bottom: 16px;
    }

    .rfq-content__btn {
        font-size: 14px;
        padding: 8px 20px;
        margin-bottom: 20px;
    }

    .rfq-features__item {
        font-size: 14px;
        margin-bottom: 10px;
    }

    .rfq-form {
        padding: 24px 20px;
        margin-top: 20px;
    }

    .rfq-form__title {
        font-size: 18px;
        margin-bottom: 20px;
    }

    .rfq-form__input,
    .rfq-form__select {
        padding: 10px 14px;
        font-size: 13px;
    }

    .rfq-form__submit {
        padding: 12px 20px;
        font-size: 15px;
    }
}

/* -------------------- 10. 响应式 -------------------- */
@media (max-width: 1199px) {
    .banner-carousel img {
        height: 260px;
    }

    .quick-nav-item__img-wrap {
        height: 76px;
    }
}

@media (max-width: 991px) {
    .category-popup {
        display: none;
    }

    /* 平板隐藏悬浮弹窗 */
    .quick-nav-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .category-showcase {
        flex-direction: column;
    }

    .big-category-card {
        width: 100%;
        min-height: auto;
    }
}

@media (max-width: 767px) {
    .banner-area {
        padding: 10px;
    }

    .banner-carousel img {
        height: 180px;
    }

    .ad-bar {
        padding: 16px;
    }

    .ad-bar__text {
        font-size: 18px;
    }

    .ad-bar__btn {
        font-size: 14px;
        padding: 8px 18px;
    }

    .product-section-box {
        height: auto;
    }
}