/* ==========================================================
   库存通 · 官网主题样式
   主题色: #667eea
   ========================================================== */
:root {
    --stock-primary: #667eea;
    --stock-primary-dark: #5568d3;
    --stock-primary-light: #8b9cf5;
    --stock-secondary: #764ba2;
    --stock-text: #1f2937;
    --stock-text-muted: #6b7280;
    --stock-bg-soft: #f6f7ff;
    --stock-border: #e8eaf6;
    --stock-radius: 16px;
    --stock-shadow: 0 20px 50px rgba(102, 126, 234, 0.15);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--stock-text);
    background: #fff;
    padding-top: 72px;
}

::selection {
    background: rgba(102, 126, 234, .25);
}

/* ---------------- 顶部导航 _Menu ---------------- */
.stock-navbar {
    height: 72px;
    background: rgba(255, 255, 255, .92);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
    transition: box-shadow .3s ease, border-color .3s ease;
}

    .stock-navbar.scrolled {
        border-bottom-color: var(--stock-border);
        box-shadow: 0 6px 24px rgba(31, 41, 55, .06);
    }

.stock-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--stock-text) !important;
}

.stock-brand-icon {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    color: #fff;
    font-size: 1.1rem;
    background: linear-gradient(135deg, var(--stock-primary), var(--stock-secondary));
    box-shadow: 0 6px 14px rgba(102, 126, 234, .35);
}

.stock-brand-badge {
    font-size: .65rem;
    font-weight: 600;
    color: var(--stock-primary);
    border: 1px solid rgba(102, 126, 234, .45);
    border-radius: 4px;
    padding: 1px 6px;
    margin-left: 2px;
}

.stock-navbar .nav-link {
    color: var(--stock-text);
    font-size: .95rem;
    font-weight: 500;
    margin: 0 6px;
    padding: 8px 12px !important;
    border-radius: 8px;
    position: relative;
    transition: color .2s ease;
}

    .stock-navbar .nav-link:hover {
        color: var(--stock-primary);
    }

    .stock-navbar .nav-link.active {
        color: var(--stock-primary);
        font-weight: 600;
    }

        .stock-navbar .nav-link.active::after {
            content: "";
            position: absolute;
            left: 12px;
            right: 12px;
            bottom: 2px;
            height: 3px;
            border-radius: 3px;
            background: linear-gradient(90deg, var(--stock-primary), var(--stock-secondary));
        }

.stock-navbar .navbar-toggler {
    border: none;
}

    .stock-navbar .navbar-toggler:focus {
        box-shadow: 0 0 0 3px rgba(102,126,234,.25);
    }

.language-switcher .dropdown-toggle {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    border: 0;
    background: transparent;
}

    .language-switcher .dropdown-toggle::after {
        margin-left: 2px;
    }

.language-switcher .dropdown-menu {
    min-width: 150px;
    border: 1px solid var(--stock-border);
    border-radius: 10px;
    padding: 6px;
    box-shadow: 0 14px 34px rgba(31, 41, 55, .12);
}

.language-switcher .dropdown-item {
    border-radius: 7px;
    padding: 8px 12px;
    font-size: .9rem;
}

    .language-switcher .dropdown-item.active,
    .language-switcher .dropdown-item:active {
        color: var(--stock-primary);
        background: rgba(102, 126, 234, .1);
        font-weight: 600;
    }

/* ---------------- 通用按钮 ---------------- */
.btn-stock-primary {
    color: #fff;
    background: linear-gradient(135deg, var(--stock-primary), var(--stock-secondary));
    border: none;
    border-radius: 10px;
    padding: 10px 28px;
    font-weight: 600;
    box-shadow: 0 8px 20px rgba(102, 126, 234, .35);
    transition: transform .2s ease, box-shadow .2s ease;
}

    .btn-stock-primary:hover, .btn-stock-primary:focus {
        color: #fff;
        transform: translateY(-2px);
        box-shadow: 0 12px 26px rgba(102, 126, 234, .45);
    }

.btn-stock-outline {
    color: var(--stock-primary);
    background: #fff;
    border: 1.5px solid var(--stock-primary);
    border-radius: 10px;
    padding: 10px 28px;
    font-weight: 600;
    transition: all .2s ease;
}

    .btn-stock-outline:hover, .btn-stock-outline:focus {
        color: #fff;
        background: var(--stock-primary);
        border-color: var(--stock-primary);
    }

/* ---------------- 章节通用 ---------------- */
.section {
    padding: 90px 0;
}

.section-light {
    background: var(--stock-bg-soft);
}

.section-label {
    display: inline-block;
    font-size: .78rem;
    font-weight: 700;
    letter-spacing: .18em;
    color: var(--stock-primary);
    text-transform: uppercase;
    margin-bottom: 10px;
}

.section-heading h2 {
    font-size: 2rem;
    font-weight: 700;
}

.section-heading p {
    color: var(--stock-text-muted);
    margin-top: 8px;
}

/* ---------------- Hero 首屏 ---------------- */
.hero {
    position: relative;
    overflow: hidden;
    padding: 96px 0 120px;
    background: radial-gradient(900px 480px at 85% -10%, rgba(102, 126, 234, .16), transparent 60%), radial-gradient(700px 420px at -10% 110%, rgba(118, 75, 162, .10), transparent 60%), var(--stock-bg-soft);
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.25;
    color: var(--stock-primary);
}

    .hero-title .line {
        display: block;
    }

.hero-desc {
    color: #4b5563;
    font-size: 1.02rem;
    line-height: 2;
    max-width: 472px;
}

.hero-price {
    margin: 28px 0 6px;
}

    .hero-price .amount {
        font-size: 3rem;
        font-weight: 800;
        color: var(--stock-primary);
    }

    .hero-price .unit {
        color: var(--stock-text-muted);
        font-size: 1rem;
        margin-left: 4px;
    }

.hero-price-note {
    color: var(--stock-text-muted);
    font-size: .9rem;
}

.hero-actions {
    margin-top: 28px;
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* 产品预览 mockup */
.hero-visual {
    position: relative;
}

.mockup-browser {
    background: #fff;
    border-radius: 14px;
    box-shadow: var(--stock-shadow);
    overflow: hidden;
    border: 1px solid var(--stock-border);
}

.mockup-browser-bar {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 14px;
    background: #f3f4fb;
    border-bottom: 1px solid var(--stock-border);
}

.mockup-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

    .mockup-dot.red {
        background: #ff5f57;
    }

    .mockup-dot.yellow {
        background: #febc2e;
    }

    .mockup-dot.green {
        background: #28c840;
    }

.mockup-tabs {
    display: flex;
    gap: 4px;
    padding: 10px 14px 0;
    border-bottom: 1px solid var(--stock-border);
    font-size: .8rem;
}

.mockup-tab {
    padding: 8px 14px;
    color: var(--stock-text-muted);
    border-radius: 8px 8px 0 0;
    position: relative;
    cursor: pointer;
    white-space: nowrap;
}

    .mockup-tab.active {
        color: var(--stock-primary);
        font-weight: 600;
        background: rgba(102, 126, 234, .08);
    }

        .mockup-tab.active::after {
            content: "";
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: -1px;
            height: 2px;
            background: var(--stock-primary);
            border-radius: 2px;
        }

.mockup-table {
    width: 100%;
    font-size: .82rem;
    margin: 0;
}

    .mockup-table th {
        color: var(--stock-text-muted);
        font-weight: 600;
        padding: 12px 14px;
        border-bottom: 1px solid var(--stock-border);
        background: #fbfbff;
        white-space: nowrap;
    }

    .mockup-table td {
        padding: 11px 14px;
        border-bottom: 1px solid #f1f2fa;
        color: #374151;
        white-space: nowrap;
    }

    .mockup-table .num-warn {
        color: var(--stock-primary);
        font-weight: 700;
    }

    .mockup-table .indent {
        color: var(--stock-text-muted);
    }

.mockup-phone {
    position: absolute;
    left: -70px;
    bottom: -40px;
    width: 170px;
    background: #fff;
    border: 1px solid var(--stock-border);
    border-radius: 22px;
    box-shadow: 0 24px 48px rgba(31, 41, 55, .18);
    overflow: hidden;
    z-index: 2;
}

.mockup-phone-bar {
    padding: 10px 14px;
    font-size: .72rem;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(135deg, var(--stock-primary), var(--stock-secondary));
}

.mockup-phone-item {
    padding: 10px 14px;
    border-bottom: 1px solid #f1f2fa;
    font-size: .7rem;
}

    .mockup-phone-item .name {
        font-weight: 600;
        color: #374151;
    }

    .mockup-phone-item .meta {
        color: var(--stock-text-muted);
        margin-top: 2px;
    }

    .mockup-phone-item .qty {
        color: var(--stock-primary);
        font-weight: 700;
        float: right;
    }

/* ---------------- 功能特性 ---------------- */
.feature-card {
    height: 100%;
    background: #fff;
    border: 1px solid var(--stock-border);
    border-radius: var(--stock-radius);
    padding: 30px 26px;
    transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}

    .feature-card:hover {
        transform: translateY(-6px);
        border-color: rgba(102, 126, 234, .4);
        box-shadow: var(--stock-shadow);
    }

.feature-icon {
    width: 52px;
    height: 52px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 14px;
    font-size: 1.35rem;
    color: var(--stock-primary);
    background: rgba(102, 126, 234, .1);
    margin-bottom: 18px;
}

.feature-card h5 {
    font-weight: 700;
}

.feature-card p {
    color: var(--stock-text-muted);
    font-size: .92rem;
    line-height: 1.9;
    margin: 0;
}

/* ---------------- 价格方案 ---------------- */
.pricing-card {
    height: 100%;
    background: #fff;
    border: 1px solid var(--stock-border);
    border-radius: var(--stock-radius);
    padding: 36px 30px;
    text-align: center;
    position: relative;
    transition: transform .25s ease, box-shadow .25s ease;
}

    .pricing-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--stock-shadow);
    }

    .pricing-card.recommend {
        border: 2px solid var(--stock-primary);
        box-shadow: var(--stock-shadow);
    }

.pricing-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: linear-gradient(135deg, var(--stock-primary), var(--stock-secondary));
    color: #fff;
    font-size: .75rem;
    font-weight: 600;
    padding: 4px 16px;
    border-radius: 999px;
}

.pricing-name {
    font-weight: 700;
    font-size: 1.1rem;
}

.pricing-amount {
    font-size: 2.6rem;
    font-weight: 800;
    color: var(--stock-primary);
    margin: 14px 0 2px;
}

    .pricing-amount small {
        font-size: .9rem;
        font-weight: 500;
        color: var(--stock-text-muted);
    }

.pricing-desc {
    color: var(--stock-text-muted);
    font-size: .85rem;
    margin-bottom: 20px;
}

.pricing-card ul {
    list-style: none;
    padding: 0;
    margin: 0 0 24px;
    text-align: left;
}

    .pricing-card ul li {
        padding: 8px 0;
        color: #4b5563;
        font-size: .92rem;
        border-bottom: 1px dashed #eef0fb;
    }

        .pricing-card ul li i {
            color: var(--stock-primary);
            margin-right: 8px;
        }

/* ---------------- FAQ ---------------- */
.stock-accordion .accordion-item {
    border: 1px solid var(--stock-border);
    border-radius: 12px !important;
    overflow: hidden;
    margin-bottom: 14px;
}

.stock-accordion .accordion-button {
    font-weight: 600;
    color: var(--stock-text);
    background: #fff;
    box-shadow: none !important;
}

    .stock-accordion .accordion-button:not(.collapsed) {
        color: var(--stock-primary);
        background: rgba(102, 126, 234, .06);
    }

.stock-accordion .accordion-body {
    color: var(--stock-text-muted);
    line-height: 1.9;
    font-size: .92rem;
}

/* ---------------- CTA ---------------- */
.cta-band {
    background: linear-gradient(135deg, var(--stock-primary), var(--stock-secondary));
    border-radius: 24px;
    color: #fff;
    padding: 64px 40px;
    text-align: center;
    box-shadow: var(--stock-shadow);
}

    .cta-band h2 {
        font-weight: 800;
    }

    .cta-band p {
        opacity: .85;
    }

.btn-stock-light {
    background: #fff;
    color: var(--stock-primary);
    border-radius: 10px;
    padding: 12px 36px;
    font-weight: 700;
    border: none;
    transition: transform .2s ease;
}

    .btn-stock-light:hover {
        color: var(--stock-primary-dark);
        transform: translateY(-2px);
    }

/* ---------------- 子页面通用头 ---------------- */
.page-hero {
    padding: 80px 0 60px;
    text-align: center;
    background: radial-gradient(700px 360px at 50% -20%, rgba(102, 126, 234, .18), transparent 65%), var(--stock-bg-soft);
}

    .page-hero h1 {
        font-weight: 800;
        font-size: 2.4rem;
    }

    .page-hero p {
        color: var(--stock-text-muted);
        margin-top: 10px;
    }

/* ---------------- 行业动态 ---------------- */
.news-card {
    height: 100%;
    background: #fff;
    border: 1px solid var(--stock-border);
    border-radius: var(--stock-radius);
    overflow: hidden;
    transition: transform .25s ease, box-shadow .25s ease;
}

    .news-card:hover {
        transform: translateY(-6px);
        box-shadow: var(--stock-shadow);
    }

.news-cover {
    height: 170px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: rgba(255, 255, 255, .9);
    font-size: 2.6rem;
    background: linear-gradient(135deg, var(--stock-primary), var(--stock-secondary));
}

    .news-cover.v2 {
        background: linear-gradient(135deg, #8b9cf5, #667eea);
    }

    .news-cover.v3 {
        background: linear-gradient(135deg, #764ba2, #667eea);
    }

.news-body {
    padding: 24px;
}

.news-tag {
    font-size: .72rem;
    color: var(--stock-primary);
    background: rgba(102, 126, 234, .1);
    border-radius: 4px;
    padding: 2px 10px;
    font-weight: 600;
}

.news-body h5 {
    font-weight: 700;
    margin: 12px 0 8px;
}

.news-body p {
    color: var(--stock-text-muted);
    font-size: .9rem;
    line-height: 1.8;
}

.news-date {
    color: #9ca3af;
    font-size: .8rem;
}

/* ---------------- 功能更新时间线 ---------------- */
.update-timeline {
    position: relative;
    padding-left: 34px;
    max-width: 760px;
    margin: 0 auto;
}

    .update-timeline::before {
        content: "";
        position: absolute;
        left: 8px;
        top: 6px;
        bottom: 6px;
        width: 2px;
        background: linear-gradient(180deg, var(--stock-primary), rgba(102, 126, 234, .1));
        border-radius: 2px;
    }

.update-item {
    position: relative;
    padding-bottom: 38px;
}

    .update-item::before {
        content: "";
        position: absolute;
        left: -32px;
        top: 5px;
        width: 14px;
        height: 14px;
        border-radius: 50%;
        background: #fff;
        border: 3px solid var(--stock-primary);
        box-shadow: 0 0 0 4px rgba(102, 126, 234, .15);
    }

.update-version {
    display: inline-block;
    font-size: .75rem;
    font-weight: 700;
    color: var(--stock-primary);
    background: rgba(102, 126, 234, .1);
    border-radius: 6px;
    padding: 2px 10px;
    margin-right: 10px;
}

.update-date {
    color: #9ca3af;
    font-size: .82rem;
}

.update-item h5 {
    font-weight: 700;
    margin: 10px 0 8px;
}

.update-item ul {
    color: var(--stock-text-muted);
    font-size: .92rem;
    line-height: 2;
    padding-left: 18px;
}

/* ---------------- 关于我们 ---------------- */
.about-stat {
    text-align: center;
    padding: 20px 0;
}

    .about-stat .value {
        font-size: 2.2rem;
        font-weight: 800;
        background: linear-gradient(135deg, var(--stock-primary), var(--stock-secondary));
        -webkit-background-clip: text;
        background-clip: text;
        -webkit-text-fill-color: transparent;
    }

    .about-stat .label {
        color: var(--stock-text-muted);
        font-size: .9rem;
    }

/* ---------------- 页脚 ---------------- */
.site-footer {
    background: #141a33;
    color: rgba(255, 255, 255, .72);
    padding: 64px 0 28px;
    margin-top: 90px;
    font-size: .92rem;
}

.footer-brand {
    color: #fff !important;
    font-size: 1.3rem;
}

    .footer-brand .brand-icon, .footer-brand .stock-brand-icon {
        margin-right: 6px;
    }

.footer-desc {
    margin-top: 16px;
    line-height: 1.9;
    max-width: 340px;
}

.site-footer h6 {
    color: #fff;
    font-weight: 700;
    margin-bottom: 16px;
}

.site-footer a {
    color: rgba(255, 255, 255, .72);
    text-decoration: none;
    display: block;
    margin-bottom: 10px;
    transition: color .2s;
}

    .site-footer a:hover {
        color: var(--stock-primary-light);
    }

.footer-contact {
    margin-bottom: 10px;
}

    .footer-contact i {
        color: var(--stock-primary-light);
        margin-right: 8px;
    }

.site-footer hr {
    border-color: rgba(255, 255, 255, .12);
    margin: 36px 0 20px;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
    color: rgba(255,255,255,.45);
    font-size: .82rem;
}

.brand-icon {
    width: 32px;
    height: 32px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 9px;
    color: #fff;
    background: linear-gradient(135deg, var(--stock-primary), var(--stock-secondary));
}

/* ---------------- 返回顶部 ---------------- */
.back-to-top {
    position: fixed;
    right: 24px;
    bottom: 24px;
    width: 44px;
    height: 44px;
    border: none;
    border-radius: 12px;
    color: #fff;
    background: linear-gradient(135deg, var(--stock-primary), var(--stock-secondary));
    box-shadow: 0 10px 24px rgba(102, 126, 234, .4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(12px);
    transition: all .3s ease;
    z-index: 1050;
}

    .back-to-top.show {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

/* ---------------- 响应式 ---------------- */
@media (max-width: 991.98px) {
    .hero {
        padding: 64px 0 90px;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-visual {
        margin-top: 48px;
        padding-left: 46px;
    }

    .stock-navbar .navbar-collapse {
        background: #fff;
        border: 1px solid var(--stock-border);
        border-radius: 12px;
        padding: 12px;
        margin-top: 10px;
        box-shadow: var(--stock-shadow);
    }
}

@media (max-width: 575.98px) {
    .section {
        padding: 64px 0;
    }

    .hero-title {
        font-size: 1.9rem;
    }

    .mockup-phone {
        left: -30px;
        width: 140px;
    }

    .cta-band {
        padding: 44px 22px;
    }
}