/* ==========================================================================
   南通锐锋钨钼 — 工业金属风 UI 定制样式
   覆盖 Start Bootstrap Creative 默认橙色主题，替换为深钢蓝 + 红色强调
   ========================================================================== */

:root {
    /* 品牌色系 */
    --brand-primary: #0f2847;        /* 深钢蓝 — 专业、制造业权威感 */
    --brand-primary-dark: #081629;
    --brand-primary-light: #1c3d6b;
    --brand-accent: #d62828;         /* 中国红 — 主 CTA、突出价格/询价 */
    --brand-accent-dark: #a51d1d;
    --brand-accent-light: #e94c4c;
    --brand-metal-1: #c8ced6;        /* 钨的银白金属色 */
    --brand-metal-2: #8a96a3;
    --brand-metal-3: #5b6673;
    --brand-gold: #c9a66b;           /* 金属高光 */

    /* 灰阶 */
    --ink-900: #0a0e1a;
    --ink-700: #2a3441;
    --ink-500: #5b6673;
    --ink-300: #a6b0bc;
    --ink-100: #eef1f5;
    --ink-50:  #f5f7fa;
}

/* ===== 覆盖 Bootstrap 变量 ===== */
:root {
    --bs-primary: var(--brand-primary);
    --bs-primary-rgb: 15, 40, 71;
    --bs-link-color: var(--brand-accent);
    --bs-link-hover-color: var(--brand-accent-dark);
}

/* ===== 全局 ===== */
body {
    color: var(--ink-700);
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--ink-900);
    letter-spacing: 0.01em;
}

/* ===== 按钮 ===== */
.btn-primary {
    background-color: var(--brand-accent) !important;
    border-color: var(--brand-accent) !important;
    box-shadow: 0 6px 16px rgba(214, 40, 40, 0.28);
    transition: all 0.2s ease;
}
.btn-primary:hover,
.btn-primary:focus,
.btn-primary:active {
    background-color: var(--brand-accent-dark) !important;
    border-color: var(--brand-accent-dark) !important;
    transform: translateY(-2px);
    box-shadow: 0 10px 22px rgba(214, 40, 40, 0.36);
}

.btn-outline-light {
    border-width: 2px;
    backdrop-filter: blur(6px);
    background: rgba(255,255,255,0.06);
}
.btn-outline-light:hover {
    background: #fff;
    color: var(--brand-primary);
    transform: translateY(-2px);
}

.btn-xl {
    padding: 1rem 2rem;
    font-size: 0.95rem;
    letter-spacing: 0.08em;
}

/* ===== 分隔线 ===== */
hr.divider {
    height: 3px;
    max-width: 3.5rem;
    margin: 1.25rem auto 1.75rem;
    background: var(--brand-accent);
    border: 0;
    opacity: 1;
    border-radius: 3px;
}
hr.divider-light {
    background: var(--brand-gold);
}

/* ===== 导航栏 ===== */
#mainNav {
    background-color: rgba(10, 14, 26, 0.55) !important;
    backdrop-filter: blur(10px);
    box-shadow: none !important;
    transition: all 0.25s ease;
    padding-top: 0.9rem !important;
    padding-bottom: 0.9rem !important;
}

#mainNav .navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    color: #fff !important;
    font-weight: 800 !important;
    font-size: 1.1rem;
    letter-spacing: 0.02em;
}
#mainNav .navbar-brand .brand-logo {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--brand-metal-1), var(--brand-metal-3));
    color: var(--brand-primary);
    font-weight: 900;
    border-radius: 8px;
    font-size: 0.85rem;
    letter-spacing: 0;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.5);
}
#mainNav .navbar-brand .brand-sub {
    font-size: 0.7rem;
    font-weight: 500;
    opacity: 0.8;
    display: block;
    letter-spacing: 0.05em;
}

#mainNav .navbar-nav .nav-item .nav-link {
    color: rgba(255,255,255,0.85) !important;
    font-weight: 600 !important;
}
#mainNav .navbar-nav .nav-item .nav-link:hover,
#mainNav .navbar-nav .nav-item .nav-link.active {
    color: #fff !important;
}

#mainNav .navbar-toggler {
    border: 1px solid rgba(255,255,255,0.35);
    padding: 0.35rem 0.6rem;
}
#mainNav .navbar-toggler-icon {
    background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='rgba%28255,255,255,0.95%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E");
}
@media (max-width: 991.98px) {
    #mainNav .navbar-collapse {
        margin-top: 0.75rem;
        padding: 0.75rem 1rem;
        background: rgba(10,14,26,0.92);
        border-radius: 10px;
        border: 1px solid rgba(255,255,255,0.08);
    }
    #mainNav .navbar-nav .nav-item .nav-link { padding: 0.5rem 0 !important; }
    #mainNav.navbar-shrink .navbar-toggler { border-color: var(--ink-100); }
    #mainNav.navbar-shrink .navbar-toggler-icon {
        background-image: url("data:image/svg+xml;charset=utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3E%3Cpath stroke='rgba%2815,40,71,0.9%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3E%3C/svg%3E");
    }
}

#mainNav.navbar-shrink {
    background-color: rgba(255,255,255,0.97) !important;
    box-shadow: 0 4px 20px rgba(15, 40, 71, 0.08) !important;
}
#mainNav.navbar-shrink .navbar-brand { color: var(--brand-primary) !important; }
#mainNav.navbar-shrink .navbar-brand .brand-logo {
    background: linear-gradient(135deg, var(--brand-primary), var(--brand-primary-light));
    color: #fff;
}
@media (min-width: 992px) {
    #mainNav.navbar-shrink .navbar-nav .nav-item .nav-link {
        color: var(--ink-700) !important;
    }
    #mainNav.navbar-shrink .navbar-nav .nav-item .nav-link:hover,
    #mainNav.navbar-shrink .navbar-nav .nav-item .nav-link.active {
        color: var(--brand-accent) !important;
    }
}

.nav-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--brand-accent);
    color: #fff !important;
    padding: 0.5rem 1.1rem !important;
    border-radius: 999px;
    font-weight: 700 !important;
    font-size: 0.85rem !important;
    transition: all 0.2s ease;
    box-shadow: 0 4px 12px rgba(214,40,40,0.35);
}
.nav-cta:hover {
    background: var(--brand-accent-dark);
    color: #fff !important;
    transform: translateY(-1px);
}

/* ===== Hero / Masthead ===== */
header.masthead {
    position: relative;
    background:
        linear-gradient(135deg, rgba(8,22,41,0.82) 0%, rgba(15,40,71,0.72) 60%, rgba(30,58,95,0.55) 100%),
        url("../assets/img/bg-masthead.jpg");
    background-position: center;
    background-size: cover;
    overflow: hidden;
}
header.masthead::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 30%, rgba(201,166,107,0.12) 0%, transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(214,40,40,0.10) 0%, transparent 40%);
    pointer-events: none;
}
header.masthead > .container { position: relative; z-index: 2; }

.hero-eyebrow {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: rgba(255,255,255,0.10);
    border: 1px solid rgba(201,166,107,0.4);
    color: var(--brand-gold);
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.15em;
    border-radius: 999px;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
}

header.masthead h1 {
    font-weight: 900 !important;
    letter-spacing: 0.01em;
    line-height: 1.15;
    text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}
header.masthead h1 .accent {
    background: linear-gradient(135deg, var(--brand-gold) 0%, #e8c989 100%);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-tagline {
    font-size: 1.15rem !important;
    color: rgba(255,255,255,0.85) !important;
    max-width: 680px;
    margin: 0 auto 2rem !important;
    line-height: 1.75;
}

.hero-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
    justify-content: center;
    margin-bottom: 2.2rem;
}
.hero-stats .stat-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.18);
    border-radius: 999px;
    color: #fff;
    font-size: 0.88rem;
    font-weight: 600;
    backdrop-filter: blur(4px);
}
.hero-stats .stat-chip i {
    color: var(--brand-gold);
    font-size: 1rem;
}

.hero-ctas {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}
.hero-ctas .btn { min-width: 180px; }

.hero-trust {
    margin-top: 2.5rem;
    color: rgba(255,255,255,0.65);
    font-size: 0.85rem;
    letter-spacing: 0.03em;
}
.hero-trust strong { color: var(--brand-gold); font-weight: 700; }

/* ===== 分段标题 ===== */
.section-eyebrow {
    display: block;
    text-align: center;
    color: var(--brand-accent);
    font-size: 0.8rem;
    font-weight: 700;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    margin-bottom: 0.6rem;
}

/* ===== 通用 section 间距（压缩避免过空） ===== */
.page-section {
    padding: 6rem 0;
}

/* ===== 蓝色行动召唤段 (#about) ===== */
#about {
    background: linear-gradient(135deg, var(--brand-primary-dark) 0%, var(--brand-primary) 50%, var(--brand-primary-light) 100%) !important;
    position: relative;
    overflow: hidden;
}
#about::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at top right, rgba(201,166,107,0.15), transparent 55%),
        radial-gradient(ellipse at bottom left, rgba(214,40,40,0.12), transparent 50%);
    pointer-events: none;
}
#about .container { position: relative; z-index: 1; }
#about h2 {
    color: #fff !important;
    font-weight: 800;
}
#about .badge-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    margin: 1.5rem 0 2rem;
}
#about .badge-row span {
    background: rgba(255,255,255,0.10);
    border: 1px solid rgba(201,166,107,0.4);
    color: #fff;
    padding: 0.45rem 1rem;
    border-radius: 6px;
    font-size: 0.88rem;
    font-weight: 600;
}

/* ===== 产品卡片 (#services) ===== */
#services { background: var(--ink-50); }
#services h2 { font-weight: 800; }

.product-card {
    display: block;
    background: #fff;
    border-radius: 14px;
    overflow: hidden;
    text-decoration: none;
    color: inherit;
    box-shadow: 0 2px 10px rgba(15,40,71,0.06);
    transition: all 0.28s cubic-bezier(0.2, 0.8, 0.2, 1);
    height: 100%;
    border: 1px solid var(--ink-100);
}
.product-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(15,40,71,0.15);
    color: inherit;
    text-decoration: none;
    border-color: var(--brand-accent);
}
.product-card .product-thumb {
    position: relative;
    aspect-ratio: 4 / 3;
    overflow: hidden;
    background: linear-gradient(135deg, var(--ink-100), #fff);
}
.product-card .product-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}
.product-card:hover .product-thumb img {
    transform: scale(1.06);
}
.product-card .product-price-tag {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    background: var(--brand-accent);
    color: #fff;
    font-weight: 700;
    font-size: 0.85rem;
    padding: 0.3rem 0.75rem;
    border-radius: 999px;
    box-shadow: 0 4px 10px rgba(214,40,40,0.35);
}
.product-card .product-body {
    padding: 1.1rem 1.2rem 1.3rem;
}
.product-card .product-name {
    font-size: 1.08rem;
    font-weight: 700;
    margin: 0 0 0.35rem;
    color: var(--ink-900);
}
.product-card .product-meta {
    font-size: 0.82rem;
    color: var(--ink-500);
    margin: 0;
    display: flex;
    align-items: center;
    gap: 0.35rem;
}
.product-card .product-cta {
    margin-top: 0.8rem;
    font-size: 0.85rem;
    color: var(--brand-accent);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    transition: gap 0.2s ease;
}
.product-card:hover .product-cta { gap: 0.55rem; }

/* ===== 产品详情 (#product-details) — 规格卡片 ===== */
#product-details { background: #fff; }
.spec-card {
    background: linear-gradient(180deg, #fff 0%, var(--ink-50) 100%);
    border: 1px solid var(--ink-100);
    border-radius: 14px;
    padding: 1.8rem 1.5rem;
    height: 100%;
    position: relative;
    overflow: hidden;
}
.spec-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--brand-accent), var(--brand-primary));
}
.spec-card h3 {
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--brand-primary);
    margin-bottom: 0.3rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.spec-card h3 i { color: var(--brand-accent); }
.spec-card .spec-alias {
    font-size: 0.85rem;
    color: var(--ink-500);
    margin-bottom: 1.2rem;
}
.spec-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.8rem;
    margin-bottom: 1.2rem;
}
.spec-grid .spec-item {
    text-align: center;
    padding: 0.9rem 0.5rem;
    background: #fff;
    border-radius: 10px;
    border: 1px solid var(--ink-100);
}
.spec-grid .spec-value {
    display: block;
    font-size: 1.25rem;
    font-weight: 800;
    color: var(--brand-primary);
    line-height: 1;
    margin-bottom: 0.3rem;
}
.spec-grid .spec-label {
    font-size: 0.72rem;
    color: var(--ink-500);
    letter-spacing: 0.05em;
}
.spec-card .spec-desc {
    font-size: 0.88rem;
    line-height: 1.75;
    color: var(--ink-700);
    margin: 0;
}
.spec-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-bottom: 1rem;
}
.spec-tags span {
    font-size: 0.75rem;
    padding: 0.25rem 0.7rem;
    background: var(--brand-primary);
    color: #fff;
    border-radius: 4px;
    font-weight: 600;
}
.spec-apps {
    list-style: none;
    padding: 0;
    margin: 0 0 1rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem 1rem;
}
.spec-apps li {
    font-size: 0.88rem;
    display: flex;
    align-items: center;
    gap: 0.45rem;
    color: var(--ink-700);
}
.spec-apps li i { color: var(--brand-accent); }

/* ===== 品质承诺 (#quality) ===== */
#quality {
    background: linear-gradient(135deg, var(--brand-primary-dark) 0%, var(--brand-primary) 55%, var(--brand-primary-light) 100%);
    position: relative;
    overflow: hidden;
}
#quality::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 15% 20%, rgba(201,166,107,0.16), transparent 50%),
        radial-gradient(circle at 85% 80%, rgba(214,40,40,0.10), transparent 45%);
    pointer-events: none;
}
#quality .container { position: relative; z-index: 1; }

.quality-eyebrow { color: var(--brand-gold) !important; }
.quality-title {
    color: #fff !important;
    font-weight: 800;
}
.quality-lede {
    text-align: center;
    color: rgba(255,255,255,0.82);
    font-size: 1.05rem;
    max-width: 640px;
    margin: 0 auto 3rem;
    line-height: 1.7;
}

.quality-metrics {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    max-width: 980px;
    margin: 0 auto 2.75rem;
}
.quality-metric {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(201,166,107,0.28);
    border-radius: 14px;
    padding: 1.75rem 1.1rem 1.5rem;
    text-align: center;
    backdrop-filter: blur(4px);
    transition: all 0.28s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.quality-metric:hover {
    transform: translateY(-4px);
    border-color: var(--brand-gold);
    background: rgba(255,255,255,0.09);
    box-shadow: 0 18px 36px rgba(0,0,0,0.2);
}
.quality-metric .qm-label {
    font-size: 0.72rem;
    letter-spacing: 0.2em;
    color: rgba(255,255,255,0.6);
    text-transform: uppercase;
    margin-bottom: 0.6rem;
}
.quality-metric .qm-value {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--brand-gold);
    line-height: 1.2;
    margin-bottom: 0.5rem;
    letter-spacing: 0.02em;
}
.quality-metric .qm-desc {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.72);
    line-height: 1.5;
}

.quality-quote {
    max-width: 820px;
    margin: 0 auto 2.25rem;
    padding: 1.75rem 1.5rem 1.5rem 3.75rem;
    position: relative;
    background: rgba(255,255,255,0.04);
    border-left: 3px solid var(--brand-gold);
    border-radius: 0 12px 12px 0;
}
.quality-quote > i.bi-quote {
    position: absolute;
    top: 0.1rem;
    left: 0.9rem;
    font-size: 3.5rem;
    color: var(--brand-gold);
    opacity: 0.55;
    line-height: 1;
}
.quality-quote p {
    margin: 0 0 0.7rem;
    color: rgba(255,255,255,0.94);
    font-size: 1.08rem;
    line-height: 1.85;
}
.quality-quote p:last-child { margin-bottom: 0; }
.quality-quote strong {
    color: var(--brand-gold);
    font-weight: 700;
}
.quality-quote-sub {
    font-size: 0.95rem !important;
    color: rgba(255,255,255,0.75) !important;
}

.quality-sem {
    max-width: 620px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.7rem;
    padding: 0.85rem 1.5rem;
    background: rgba(214,40,40,0.15);
    border: 1px solid rgba(214,40,40,0.45);
    border-radius: 999px;
    color: #fff;
    font-size: 0.95rem;
    font-weight: 600;
    text-align: center;
}
.quality-sem i {
    color: var(--brand-gold);
    font-size: 1.3rem;
    flex-shrink: 0;
}
.quality-sem strong { color: var(--brand-gold); }

@media (max-width: 767.98px) {
    .quality-metrics { grid-template-columns: 1fr; gap: 0.85rem; }
    .quality-quote { padding: 1.5rem 1.2rem 1.2rem 2.75rem; }
    .quality-quote > i.bi-quote { font-size: 2.5rem; top: 0.3rem; left: 0.7rem; }
    .quality-quote p { font-size: 1rem; }
    .quality-sem { flex-direction: column; gap: 0.3rem; padding: 0.9rem 1.2rem; }
}

/* ===== 为什么选择我们 (#why-us) ===== */
#why-us {
    background: var(--ink-50);
    position: relative;
}
.why-card {
    background: #fff;
    border-radius: 14px;
    padding: 2rem 1.5rem 1.75rem;
    height: 100%;
    text-align: center;
    border: 1px solid var(--ink-100);
    transition: all 0.28s cubic-bezier(0.2, 0.8, 0.2, 1);
    position: relative;
}
.why-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 18px 36px rgba(15,40,71,0.1);
    border-color: transparent;
}
.why-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--brand-primary), var(--brand-primary-light));
    color: #fff;
    border-radius: 14px;
    font-size: 1.6rem;
    box-shadow: 0 8px 18px rgba(15,40,71,0.25);
}
.why-card:nth-child(2) .why-icon { background: linear-gradient(135deg, var(--brand-accent), var(--brand-accent-light)); box-shadow: 0 8px 18px rgba(214,40,40,0.25); }
.why-card:nth-child(3) .why-icon { background: linear-gradient(135deg, var(--brand-metal-3), var(--brand-metal-2)); box-shadow: 0 8px 18px rgba(91,102,115,0.25); }
.why-card:nth-child(4) .why-icon { background: linear-gradient(135deg, var(--brand-gold), #e8c989); box-shadow: 0 8px 18px rgba(201,166,107,0.3); }

.why-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--ink-900);
}
.why-card p {
    font-size: 0.88rem;
    color: var(--ink-500);
    line-height: 1.7;
    margin: 0;
}

/* ===== Portfolio ===== */
#portfolio-wrap { background: #fff; }
#portfolio .container-fluid .portfolio-box .portfolio-box-caption {
    background: linear-gradient(180deg, rgba(15,40,71,0) 0%, rgba(15,40,71,0.55) 60%, rgba(10,14,26,0.92) 100%) !important;
    opacity: 1 !important;
    justify-content: flex-end !important;
    padding: 1.25rem !important;
    align-items: flex-start !important;
    text-align: left !important;
}
#portfolio .container-fluid .portfolio-box .portfolio-box-caption .project-name {
    font-size: 1.05rem !important;
    font-weight: 700;
    transform: translateY(8px);
    transition: transform 0.3s ease;
}
#portfolio .container-fluid .portfolio-box .portfolio-box-caption .project-category {
    background: var(--brand-accent);
    padding: 0.2rem 0.7rem;
    border-radius: 4px;
    color: #fff !important;
    font-size: 0.78rem !important;
    font-weight: 700;
    margin-bottom: 0.5rem;
    opacity: 0;
    transform: translateY(8px);
    transition: all 0.3s ease 0.05s;
}
#portfolio .container-fluid .portfolio-box:hover .portfolio-box-caption .project-name,
#portfolio .container-fluid .portfolio-box:hover .portfolio-box-caption .project-category {
    opacity: 1;
    transform: translateY(0);
}
#portfolio .container-fluid .portfolio-box:hover .portfolio-box-caption {
    background: linear-gradient(180deg, rgba(15,40,71,0) 0%, rgba(15,40,71,0.75) 55%, rgba(10,14,26,0.97) 100%) !important;
}

/* ===== 市场行情 ===== */
#market-section { background: var(--ink-50); }
#market-title { font-weight: 800; }
#market-title .text-primary { color: var(--brand-accent) !important; }
#loading-message .spinner-border { color: var(--brand-accent) !important; }

/* ===== 联系方式 ===== */
#contact {
    background: linear-gradient(180deg, #fff 0%, var(--ink-50) 100%);
}
#contact h2 { font-weight: 800; }

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.25rem;
    max-width: 1000px;
    margin: 0 auto;
}
.contact-card {
    background: #fff;
    border: 1px solid var(--ink-100);
    border-radius: 14px;
    padding: 1.75rem 1.25rem;
    text-align: center;
    transition: all 0.25s ease;
    text-decoration: none;
    color: inherit;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}
.contact-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 16px 30px rgba(15,40,71,0.1);
    border-color: var(--brand-accent);
    color: inherit;
    text-decoration: none;
}
.contact-card i {
    font-size: 1.8rem;
    color: var(--brand-accent);
    margin-bottom: 0.3rem;
}
.contact-card .label {
    font-size: 0.8rem;
    color: var(--ink-500);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}
.contact-card .value {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--ink-900);
    word-break: break-all;
}

/* ===== 移动端悬浮 CTA 栏 ===== */
.mobile-cta-bar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1030;
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--ink-100);
    padding: 0.6rem 0.75rem;
    box-shadow: 0 -4px 20px rgba(0,0,0,0.08);
}
.mobile-cta-bar .row { display: flex; gap: 0.5rem; }
.mobile-cta-bar a {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.75rem 0.5rem;
    border-radius: 999px;
    font-weight: 700;
    font-size: 0.9rem;
    text-decoration: none;
    transition: transform 0.15s ease;
}
.mobile-cta-bar a:active { transform: scale(0.97); }
.mobile-cta-bar .mcta-call {
    background: var(--brand-accent);
    color: #fff;
}
.mobile-cta-bar .mcta-1688 {
    background: #ff6a00;
    color: #fff;
}
@media (max-width: 767.98px) {
    .mobile-cta-bar { display: block; }
    body { padding-bottom: 80px; }
}

/* ===== 页脚 ===== */
footer.site-footer {
    background: var(--brand-primary-dark) !important;
    color: rgba(255,255,255,0.7);
    padding: 3.5rem 0 1.5rem !important;
}
footer.site-footer h5 {
    color: #fff;
    font-size: 0.95rem;
    font-weight: 700;
    margin-bottom: 1rem;
    letter-spacing: 0.05em;
}
footer.site-footer a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    font-size: 0.88rem;
}
footer.site-footer a:hover {
    color: var(--brand-gold);
}
footer.site-footer ul {
    list-style: none;
    padding: 0;
    margin: 0;
}
footer.site-footer ul li {
    margin-bottom: 0.5rem;
    font-size: 0.88rem;
}
footer.site-footer .footer-brand {
    color: #fff;
    font-weight: 800;
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
}
footer.site-footer .footer-desc {
    font-size: 0.85rem;
    line-height: 1.7;
}
footer.site-footer .footer-divider {
    border-top: 1px solid rgba(255,255,255,0.1);
    margin-top: 2.5rem;
    padding-top: 1.25rem;
    text-align: center;
    font-size: 0.8rem;
    color: rgba(255,255,255,0.5);
}

/* ===== 复制提示浮条 ===== */
.site-toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    background: var(--ink-900);
    color: #fff;
    padding: 0.85rem 1.5rem;
    border-radius: 999px;
    font-size: 0.92rem;
    font-weight: 600;
    box-shadow: 0 12px 32px rgba(0,0,0,0.25);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
    z-index: 2000;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    max-width: 92vw;
}
.site-toast i { color: var(--brand-gold); font-size: 1.1rem; }
.site-toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}
@media (max-width: 767.98px) {
    .site-toast { bottom: 6rem; }
}

/* ===== 响应式调优 ===== */
@media (max-width: 991.98px) {
    .page-section { padding: 4rem 0; }
    header.masthead h1 { font-size: 2rem !important; }
    .hero-tagline { font-size: 1rem !important; }
    .spec-grid { grid-template-columns: repeat(3, 1fr); }
    #market [id$="-chart"] { height: 340px !important; margin-bottom: 1rem; }
}
@media (max-width: 575.98px) {
    .spec-grid { grid-template-columns: 1fr 1fr; }
    .spec-apps { grid-template-columns: 1fr; }
    .hero-ctas .btn { width: 100%; min-width: 0; }
    #mainNav .navbar-brand { font-size: 0.95rem; }
    #mainNav .navbar-brand .brand-sub { display: none; }
}