:root {
    --color-primary: #a0a0a0;
    --color-bg-light: #efefea;
    --color-bg-lighter: #f4f5f2;
    --color-mid: #a0a0a0;
    --color-mid-dark: #757575;
    --color-dark: #282828;
    --color-white: #ffffff;
    --color-accent-warm: #c4a882;

    --font-heading: 'Georgia', 'Microsoft YaHei', 'STSong', 'Songti SC', 'SimSun', 'KaiTi', serif;
    --font-body: 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;

    --transition-smooth: all 0.35s cubic-bezier(0.25, 0.1, 0.25, 1);
    --shadow-soft: 0 4px 20px rgba(40, 40, 40, 0.06);
    --shadow-medium: 0 8px 32px rgba(40, 40, 40, 0.10);
    --shadow-lift: 0 16px 48px rgba(40, 40, 40, 0.14);
    --border-radius: 6px;
    --border-radius-lg: 10px;
}

/* 基础重置与全局样式全局盒模型（已有，保留） */
*,
*::before,
*::after {
    box-sizing: border-box;
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--color-dark);
    background-color: var(--color-bg-lighter);
    line-height: 1.7;
    letter-spacing: 0.02em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    margin: 0;
    padding: 0;
}

/* 全局链接样式（补充，覆盖 Bootstrap 部分默认行为） */
a {
    color: var(--color-dark);
    text-decoration: none;
    transition: var(--transition-smooth);
}

a:hover {
    color: var(--color-mid-dark);
}

/* 图片基础样式 */
img {
    max-width: 100%;
    height: auto;
    display: inline-block;
}

/* 去除列表默认样式（若需要，Bootstrap 已对 .list-unstyled 处理，此处保持默认） */
/* 表单元素基础样式（无表单，暂不添加） */

/* 可访问性焦点样式 */
:focus-visible {
    outline: 2px solid var(--color-mid);
    outline-offset: 2px;
}

/* 去除按钮默认轮廓并自定义 */
.btn:focus,
.btn:active:focus,
.navbar-toggler:focus {
    box-shadow: 0 0 0 2px rgba(160, 160, 160, 0.5) !important;
    outline: none;
}

/* 设置标题字体为衬线体（可通过 Bootstrap 覆盖） */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 600;
}

/* 3. 工具类（辅助布局） */
.section-padding {
    padding: 80px 0;
}

/* 动画相关 */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-up.appear {
    opacity: 1;
    transform: translateY(0);
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 999;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: var(--color-dark);
    color: #fff;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    box-shadow: var(--shadow-medium);
    transition: var(--transition-smooth);
    opacity: 0;
    visibility: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: #1a1a1a;
    transform: translateY(-3px);
}
/* 导航栏 */
.navbar {
    background-color: var(--color-white);
    border-bottom: 1px solid rgba(160, 160, 160, 0.18);
    padding: 10px 0;
    transition: var(--transition-smooth);
    z-index: 1050;
    box-shadow: 0 1px 8px rgba(40, 40, 40, 0.03);
}

.navbar.scrolled {
    box-shadow: var(--shadow-soft);
    padding: 6px 0;
}

.navbar-brand {
    padding: 0;
    margin-right: 28px;
    flex-shrink: 0;
}

.navbar-brand img.logo-img {
    height: 44px;
    width: auto;
    transition: var(--transition-smooth);
}

.navbar.scrolled .navbar-brand img.logo-img {
    height: 38px;
}

.navbar .nav-link {
    color: var(--color-dark) !important;
    font-size: 0.92rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    padding: 10px 16px !important;
    transition: var(--transition-smooth);
    position: relative;
    white-space: nowrap;
}

.navbar .nav-link:hover,
.navbar .nav-link:focus {
    color: var(--color-mid-dark) !important;
}

.navbar .nav-link::after {
    content: '';
    position: absolute;
    bottom: 5px;
    left: 16px;
    right: 16px;
    height: 2px;
    background-color: var(--color-mid);
    transform: scaleX(0);
    transition: transform 0.3s ease;
    border-radius: 1px;
}

.navbar .nav-link:hover::after,
.navbar .nav-link.active::after {
    transform: scaleX(0.7);
}

.navbar .dropdown-menu {
    border: none;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-medium);
    padding: 10px 0;
    margin-top: 10px;
    background: var(--color-white);
    min-width: 180px;
    animation: fadeInDown 0.25s ease;
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.navbar .dropdown-item {
    padding: 10px 22px;
    font-size: 0.9rem;
    color: var(--color-dark);
    transition: var(--transition-smooth);
    letter-spacing: 0.03em;
}

.navbar .dropdown-item:hover {
    background-color: var(--color-bg-lighter);
    color: var(--color-mid-dark);
    padding-left: 26px;
}

/* 导航右侧按钮 */
.btn-tmall-nav {
    background-color: var(--color-dark);
    color: #fff !important;
    border: none;
    border-radius: 50px;
    padding: 8px 20px;
    font-size: 0.88rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    transition: var(--transition-smooth);
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
}

.btn-tmall-nav:hover {
    background-color: #1a1a1a;
    transform: translateY(-1px);
    box-shadow: var(--shadow-soft);
    color: #fff;
}

.btn-chat-nav {
    background: transparent;
    border: 1.5px solid var(--color-mid);
    color: var(--color-dark);
    border-radius: 50px;
    padding: 8px 18px;
    font-size: 0.88rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    transition: var(--transition-smooth);
    white-space: nowrap;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.btn-chat-nav:hover {
    background-color: var(--color-bg-light);
    border-color: var(--color-mid-dark);
    color: var(--color-dark);
}

.navbar-toggler {
    border: none;
    padding: 8px;
    color: var(--color-dark);
}

.navbar-toggler:focus {
    box-shadow: none;
    outline: none;
}

        /* Hero 横幅  */
        .head-hero {
            background-color: #e8e4de;
            backgroun·d-image: linear-gradient(165deg, #f0ece6 0%, #e4ded6 30%, #d8d1c8 60%, #e6e0d8 100%);
            padding: 90px 0 70px
            position: relative;
            overflow: hidden;
            text-align: center;
        }
        .head-hero::before {
            content: '';
            position: absolute;
            top: -50px;
            right: -60px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(160, 160, 160, 0.07);
            z-index: 0;
        }
        .head-hero::after {
            content: '';
            position: absolute;
            bottom: -30px;
            left: -50px;
            width: 200px;
            height: 200px;
            border-radius: 50%;
            background: rgba(160, 160, 160, 0.05);
            z-index: 0;
        }
        .head-hero .container {
            position: relative;
            z-index: 1;
        }
        .head-hero .breadcrumb-nav {
            font-size: 0.82rem;
            letter-spacing: 0.06em;
            color: var(--color-mid-dark);
            margin-bottom: 16px;
        }
        .head-hero .breadcrumb-nav a {
            color: var(--color-mid-dark);
            text-decoration: none;
            transition: var(--transition-smooth);
        }
        .head-hero .breadcrumb-nav a:hover {
            color: var(--color-dark);
        }
        .head-hero h1 {
            font-family: var(--font-heading);
            font-size: clamp(2rem, 3.5vw, 2.8rem);
            font-weight: 600;
            letter-spacing: 0.05em;
            color: var(--color-dark);
            margin-bottom: 0.6rem;
            line-height: 1.3;
        }
        .head-hero .hero-subtitle {
            font-size: 1.05rem;
            color: var(--color-mid-dark);
            letter-spacing: 0.04em;
            max-width: 500px;
            margin: 0 auto;
            line-height: 1.6;
        }
        @media (max-width: 768px) {
            .head-hero {
                padding: 60px 0 45px;
            }
            .head-hero h1 {
                font-size: 1.5rem;
            }
            .head-hero .hero-subtitle {
                font-size: 0.9rem;
            }
        }
/* 导6. 通用区块标题 */
.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title .label-tag {
    display: inline-block;
    font-size: 0.82rem;
    letter-spacing: 0.1em;
    color: var(--color-mid-dark);
    text-transform: uppercase;
    border-bottom: 2px solid var(--color-mid);
    padding-bottom: 4px;
    margin-bottom: 12px;
}

.section-title h2 {
    font-family: var(--font-heading);
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    font-weight: 600;
    color: var(--color-dark);
    letter-spacing: 0.05em;
    margin-bottom: 8px;
}

.section-title p.subtitle {
    color: var(--color-mid-dark);
    font-size: 0.95rem;
    letter-spacing: 0.03em;
    max-width: 500px;
    margin: 0 auto;
}


/*  CTA 通栏  */
.cta-strip {
            background-color: #1a1a1a; color: #e0e0e0; padding: 50px 0;
            border-top: 1px solid rgba(255,255,255,0.08); border-bottom: 1px solid rgba(255,255,255,0.08);
        }
.cta-strip .cta-inner { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 20px; }
.cta-strip .cta-text h3 { font-family: var(--font-heading); font-size: 1.5rem; font-weight: 600; color: #fff; }
.cta-strip .cta-text p { color: #b0b0b0; margin: 0; font-size: 0.95rem; }
.cta-strip .btn-cta {
            background-color: #fff; color: #1a1a1a; border: none; border-radius: 50px;
            padding: 13px 32px; font-size: 0.95rem; font-weight: 600; letter-spacing: 0.05em;
            transition: var(--transition-smooth); text-decoration: none; display: inline-flex; align-items: center; gap: 8px;
        }
.cta-strip .btn-cta:hover { background-color: #e0e0e0; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,0.3); }



/*  14. Modal 弹窗  */
.modal-content {
    border: none;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lift);
    overflow: hidden;
}

.modal-header {
    border-bottom: 1px solid rgba(160, 160, 160, 0.2);
    padding: 20px 24px;
    background-color: var(--color-bg-lighter);
}

.modal-header .modal-title {
    font-family: var(--font-heading);
    font-weight: 600;
    letter-spacing: 0.04em;
    color: var(--color-dark);
}

.modal-body {
    padding: 28px 24px;
}

.modal-body .contact-phone a {
    font-size: 1.3rem;
    font-weight: 600;
    color: var(--color-dark);
    text-decoration: none;
    letter-spacing: 0.04em;
    transition: var(--transition-smooth);
}

.modal-body .contact-phone a:hover {
    color: var(--color-mid-dark);
}

.modal-body .wechat-qr-placeholder {
    width: 140px;
    height: 140px;
    margin: 0 auto;
    background: var(--color-bg-light);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--color-mid);
    color: var(--color-mid-dark);
    font-size: 0.8rem;
    letter-spacing: 0.04em;
    position: relative;
}

.modal-body .wechat-qr-placeholder .qr-inner {
    text-align: center;
}

.modal-body .wechat-qr-placeholder .qr-inner i {
    font-size: 2.5rem;
    display: block;
    margin-bottom: 6px;
    color: var(--color-mid-dark);
}

/* 15. 页脚  */
.site-footer {
    background-color: var(--color-dark);
    color: #c5c5c5;
    padding: 60px 0 30px;
}

.site-footer h5 {
    font-family: var(--font-heading);
    color: #e8e8e8;
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.06em;
    margin-bottom: 16px;
}

.site-footer ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.site-footer ul li {
    margin-bottom: 8px;
}

.site-footer ul li a {
    color: #b0b0b0;
    text-decoration: none;
    font-size: 0.85rem;
    letter-spacing: 0.03em;
    transition: var(--transition-smooth);
}

.site-footer ul li a:hover {
    color: #e8e8e8;
    padding-left: 4px;
}

.site-footer .footer-contact p {
    font-size: 0.85rem;
    margin-bottom: 6px;
    letter-spacing: 0.03em;
    color: #b0b0b0;
}

.site-footer .footer-contact p i {
    margin-right: 6px;
    color: var(--color-mid);
}

.site-footer .social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.08);
    color: #c5c5c5;
    margin-right: 8px;
    margin-bottom: 8px;
    transition: var(--transition-smooth);
    text-decoration: none;
    font-size: 1rem;
}

.site-footer .social-links a:hover {
    background-color: rgba(255, 255, 255, 0.18);
    color: #fff;
    transform: translateY(-2px);
}

.site-footer .footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    margin-top: 40px;
    padding-top: 20px;
    text-align: center;
    font-size: 0.8rem;
    color: #888;
    letter-spacing: 0.03em;
}
.site-footer .footer-bottom a { color:#888;}


/* 16. 响应式设计 */
/* 大平板以下 (≤991px) */
@media (max-width: 991px) {
    .navbar .nav-link {
        padding: 8px 12px !important;
        font-size: 0.85rem;
    }
    .btn-tmall-nav,
    .btn-chat-nav {
        font-size: 0.8rem;
        padding: 6px 14px;
    }
    .style-card {
        height: 320px;
    }
    .product-series-card .card-img-wrap {
        aspect-ratio: 4 / 3;
    }
    .cta-strip .cta-inner {
        flex-direction: column;
        text-align: center;
    }
    .material-card {
        aspect-ratio: 3 / 4;
        padding: 24px 16px;
    }
    .material-card h4 {
        font-size: 1.15rem;
    }
    .material-card p {
        font-size: 0.8rem;
    }
}

/* 平板竖屏及以下 (≤767px) */
@media (max-width: 767px) {
    .section-padding {
        padding: 50px 0;
    }
    #heroCarousel .carousel-item {
        height: 55vh;
        min-height: 380px;
    }
    #heroCarousel .carousel-caption {
        bottom: 10%;
        left: 5%;
        right: 5%;
    }
    #heroCarousel .carousel-caption h1 {
        font-size: 1.6rem;
    }
    #heroCarousel .carousel-caption p {
        font-size: 0.9rem;
    }
    .style-card {
        height: 260px;
    }
    .product-series-card .card-img-wrap {
        aspect-ratio: 3 / 2;
    }
    .product-series-card .card-body {
        padding: 16px 14px;
    }
    .product-series-card .card-body h3 {
        font-size: 1.1rem;
    }
    .product-series-card .card-body p {
        font-size: 0.8rem;
    }
    .material-card {
        aspect-ratio: 4 / 3;
        padding: 20px 14px;
        min-height: 240px;
    }
    .material-card h4 {
        font-size: 1.1rem;
    }
    .material-card p {
        font-size: 0.78rem;
        max-width: 95%;
    }
    .sleep-aesthetic-block .sa-img {
        aspect-ratio: 16 / 9;
    }
}

/* 手机端 (≤575px) */
@media (max-width: 575px) {
    .material-card {
        aspect-ratio: 5 / 4;
        padding: 18px 12px;
        min-height: 220px;
    }
    .material-card h4 {
        font-size: 1rem;
    }
    .material-card p {
        font-size: 0.75rem;
    }
    .product-series-card .card-img-wrap {
        aspect-ratio: 16 / 10;
    }
}