/* 全局重置 - 极简版 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --header-h: 72px;
            /* 详情页首屏：左图 + 右文固定最小高度、左右齐平 */
            --product-hero-min-h: 520px;
            --product-hero-media-col: minmax(300px, 400px);
            --product-hero-img-max-h: 460px;
        }

        body {
            font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
            color: #333;
            background-color: #f8f9fa;
            line-height: 1.6;
            padding-top: var(--header-h);
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        /* ========== 与 index.html 一致的企业风导航 ========== */
        .site-header {
            --nav-fg: #1a1a1a;
            --nav-fg-muted: rgba(26, 26, 26, 0.65);
            --nav-accent: #0088cc;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            font-family: system-ui, "Microsoft YaHei", "PingFang SC", sans-serif;
            transition: background-color 0.35s ease, box-shadow 0.35s ease, border-color 0.35s ease;
        }

        .site-header__bar {
            background: #fff;
            border-bottom: 1px solid rgba(0, 0, 0, 0.06);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
        }

        .site-header.site-header--menu-open .site-header__bar {
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
        }

        .site-header__inner {
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 clamp(16px, 4vw, 40px);
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-h);
            gap: 24px;
        }

        .site-header__brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            letter-spacing: 0.02em;
            color: var(--nav-accent);
            cursor: pointer;
            flex-shrink: 0;
            border: none;
            background: none;
            padding: 0;
            font: inherit;
        }

        .site-header__brand i {
            font-size: 26px;
        }

        .site-header__utils {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-shrink: 0;
        }

        .site-header__lang {
            display: none;
            font-size: 13px;
            color: var(--nav-fg-muted);
            gap: 8px;
            align-items: center;
        }

        .site-header__lang button {
            border: none;
            background: none;
            cursor: pointer;
            font: inherit;
            color: inherit;
            padding: 4px 0;
            opacity: 0.75;
        }

        .site-header__lang button.is-active {
            opacity: 1;
            font-weight: 600;
            color: var(--nav-accent);
        }

        @media (min-width: 992px) {
            .site-header__lang {
                display: flex;
            }
        }

        .site-nav {
            display: none;
            align-items: center;
            justify-content: center;
            flex: 1;
        }

        @media (min-width: 992px) {
            .site-nav {
                display: flex;
            }
        }

        .site-nav__list {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .site-nav__item {
            position: relative;
        }

        .site-nav__trigger {
            display: flex;
            align-items: center;
            gap: 6px;
            padding: 10px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--nav-fg);
            cursor: pointer;
            border: none;
            background: none;
            font: inherit;
            border-radius: 4px;
            white-space: nowrap;
        }

        .site-nav__trigger:hover,
        .site-nav__item:focus-within>.site-nav__trigger {
            color: var(--nav-accent);
        }

        .site-nav__chev {
            font-size: 10px;
            opacity: 0.7;
            transition: transform 0.25s ease;
        }

        .site-nav__item:hover .site-nav__chev,
        .site-nav__item:focus-within .site-nav__chev {
            transform: rotate(180deg);
        }

        .site-nav__panel {
            position: absolute;
            top: calc(100% + 4px);
            left: 50%;
            transform: translateX(-50%) translateY(8px);
            min-width: 240px;
            padding: 8px 0;
            background: #fff;
            border-radius: 4px;
            box-shadow: 0 16px 48px rgba(0, 0, 0, 0.12), 0 0 1px rgba(0, 0, 0, 0.08);
            list-style: none;
            margin: 0;
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: opacity 0.22s ease, transform 0.22s ease, visibility 0.22s;
        }

        .site-nav__item:hover>.site-nav__panel,
        .site-nav__item:focus-within>.site-nav__panel {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
            transform: translateX(-50%) translateY(0);
        }

        .site-nav__row {
            position: relative;
        }

        .site-nav__link {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 10px 20px;
            font-size: 14px;
            color: #333;
            text-align: left;
            border: none;
            background: none;
            font: inherit;
            cursor: pointer;
            gap: 12px;
            transition: background 0.2s ease, color 0.2s ease;
        }

        .site-nav__link:hover {
            background: rgba(0, 136, 204, 0.08);
            color: var(--nav-accent);
        }

        .site-nav__link .fa-chevron-right {
            font-size: 10px;
            opacity: 0.45;
        }

        .site-nav__sub {
            position: absolute;
            left: 100%;
            top: 0;
            margin-left: 4px;
            min-width: 200px;
            padding: 8px 0;
            background: #fff;
            border-radius: 4px;
            box-shadow: 0 16px 48px rgba(0, 0, 0, 0.12), 0 0 1px rgba(0, 0, 0, 0.08);
            list-style: none;
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: opacity 0.2s ease, visibility 0.2s;
        }

        .site-nav__row:hover>.site-nav__sub,
        .site-nav__row:focus-within>.site-nav__sub {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
        }

        .site-header__toggle {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border: none;
            border-radius: 8px;
            background: rgba(0, 136, 204, 0.1);
            color: var(--nav-accent);
            font-size: 20px;
            cursor: pointer;
        }

        @media (min-width: 992px) {
            .site-header__toggle {
                display: none;
            }
        }

        .site-drawer {
            position: fixed;
            top: var(--header-h);
            left: 0;
            width: 100%;
            max-height: min(72vh, 560px);
            overflow-y: auto;
            background: #fff;
            border-top: 1px solid #eee;
            box-shadow: 0 24px 48px rgba(0, 0, 0, 0.12);
            z-index: 999;
            transform: translateY(-12px);
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: opacity 0.28s ease, transform 0.28s ease, visibility 0.28s;
        }

        .site-drawer.is-open {
            transform: translateY(0);
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
        }

        .site-drawer__list {
            list-style: none;
            margin: 0;
            padding: 8px 0 20px;
        }

        .site-drawer__item {
            border-bottom: 1px solid #f0f0f0;
        }

        .site-drawer__head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 14px 20px;
            font-size: 16px;
            font-weight: 500;
            color: #1a1a1a;
            border: none;
            background: #fff;
            font: inherit;
            cursor: pointer;
            text-align: left;
        }

        .site-drawer__head .fa-chevron-down {
            font-size: 12px;
            color: #999;
            transition: transform 0.25s ease;
        }

        .site-drawer__head--leaf {
            justify-content: flex-start;
            font-weight: 500;
        }

        .site-drawer__item.is-expanded>.site-drawer__head .fa-chevron-down {
            transform: rotate(180deg);
        }

        .site-drawer__nested {
            list-style: none;
            margin: 0;
            padding: 0 0 8px;
            background: #fafafa;
            display: none;
        }

        .site-drawer__item.is-expanded>.site-drawer__nested {
            display: block;
        }

        .site-drawer__link {
            display: block;
            padding: 12px 20px 12px 32px;
            font-size: 15px;
            color: #444;
            border: none;
            background: none;
            width: 100%;
            text-align: left;
            font: inherit;
            cursor: pointer;
        }

        .site-drawer__link:hover {
            color: var(--nav-accent);
            background: rgba(0, 136, 204, 0.06);
        }

        .site-drawer__nested .site-drawer__nested {
            background: #f3f4f6;
        }

        .site-drawer__nested .site-drawer__link {
            padding-left: 44px;
            font-size: 14px;
        }

        .site-overlay {
            position: fixed;
            inset: 0;
            top: var(--header-h);
            background: rgba(0, 0, 0, 0.35);
            z-index: 998;
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.28s ease, visibility 0.28s;
        }

        .site-overlay.is-open {
            opacity: 1;
            visibility: visible;
        }

        @media (min-width: 992px) {

            .site-drawer,
            .site-overlay {
                display: none !important;
            }
        }

        /* ========== 产品详情页主体（导航以下） ========== */
        .product-main {
            max-width: 1200px;
            margin: 0 auto;
            padding: 28px 20px 56px;
        }

        .product-hero {
            display: grid;
            grid-template-columns: var(--product-hero-media-col) minmax(0, 1fr);
            gap: 36px;
            align-items: stretch;
            margin-bottom: 40px;
        }

        .product-hero__media {
            background: linear-gradient(165deg, #f0f7fc 0%, #fff 45%);
            border-radius: 16px;
            padding: 28px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
            text-align: center;
            min-height: var(--product-hero-min-h);
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            box-sizing: border-box;
        }

        .product-hero__media img {
            max-width: 100%;
            width: auto;
            max-height: var(--product-hero-img-max-h);
            height: auto;
            object-fit: contain;
            border-radius: 8px;
        }

        .product-hero__intro {
            background: #fff;
            border-radius: 16px;
            padding: 32px 32px 28px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.06);
            min-height: var(--product-hero-min-h);
            display: flex;
            flex-direction: column;
            box-sizing: border-box;
        }

        .product-hero__intro .product-actions {
            margin-top: auto;
            padding-top: 16px;
        }

        .product-model {
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 0.06em;
            color: #0088cc;
            text-transform: uppercase;
            margin-bottom: 8px;
        }

        .product-title {
            font-size: clamp(22px, 3vw, 30px);
            color: #1a1a1a;
            font-weight: 700;
            line-height: 1.3;
            margin-bottom: 12px;
        }

        .product-lead {
            font-size: 16px;
            color: #555;
            line-height: 1.65;
            margin-bottom: 18px;
        }

        .product-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 22px;
        }

        .product-badge {
            font-size: 13px;
            padding: 6px 12px;
            border-radius: 999px;
            background: rgba(0, 136, 204, 0.1);
            color: #006699;
            font-weight: 500;
        }

        .product-badge--green {
            background: rgba(0, 204, 153, 0.12);
            color: #0a8060;
        }

        .product-highlights {
            list-style: none;
            margin: 0 0 24px;
            padding: 0;
            display: grid;
            gap: 10px;
        }

        .product-highlights li {
            display: flex;
            gap: 10px;
            align-items: flex-start;
            font-size: 14px;
            color: #444;
            line-height: 1.5;
        }

        .product-highlights li i {
            color: #00cc99;
            margin-top: 3px;
            flex-shrink: 0;
        }

        .product-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .btn {
            padding: 12px 24px;
            border: none;
            border-radius: 8px;
            font-size: 15px;
            cursor: pointer;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            font-weight: 500;
            transition: background 0.2s ease, transform 0.15s ease;
        }

        .btn:hover {
            transform: translateY(-1px);
        }

        .btn-primary {
            background: #0088cc;
            color: #fff;
        }

        .btn-primary:hover {
            background: #006699;
        }

        .btn-secondary {
            background: #00cc99;
            color: #fff;
        }

        .btn-secondary:hover {
            background: #009977;
        }

        .btn i {
            margin-right: 8px;
        }

        /* 核心指标卡片 */
        .product-kpis {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            margin-bottom: 40px;
        }

        .product-kpi {
            background: #fff;
            border-radius: 12px;
            padding: 20px 18px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            border: 1px solid rgba(0, 0, 0, 0.04);
        }

        .product-kpi__val {
            font-size: 20px;
            font-weight: 700;
            color: #0088cc;
            margin-bottom: 4px;
            line-height: 1.25;
        }

        .product-kpi__label {
            font-size: 13px;
            color: #666;
            line-height: 1.4;
        }

        /* 通用区块标题 */
        .section-head {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 18px;
        }

        .section-head h2 {
            font-size: 20px;
            font-weight: 700;
            color: #1a1a1a;
        }

        .section-head i {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(0, 136, 204, 0.12);
            color: #0088cc;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
        }

        .product-section {
            margin-bottom: 36px;
        }

        .spec-card {
            background: #fff;
            border-radius: 16px;
            padding: 24px 28px;
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.05);
        }

        .param-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 14px;
        }

        .param-table tr {
            border-bottom: 1px solid #eee;
        }

        .param-table tr:last-child {
            border-bottom: none;
        }

        .param-table th,
        .param-table td {
            padding: 12px 12px 12px 0;
            vertical-align: top;
            text-align: left;
        }

        .param-table td:first-child {
            color: #666;
            width: 38%;
            max-width: 280px;
            line-height: 1.5;
        }

        .param-table td:last-child {
            color: #1a1a1a;
            font-weight: 500;
            line-height: 1.55;
        }

        .param-note {
            font-size: 12px;
            color: #888;
            font-weight: 400;
        }

        /* 主题卖点网格 */
        .theme-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 18px;
        }

        .theme-card {
            background: #fff;
            border-radius: 14px;
            padding: 22px 24px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            border-left: 4px solid #0088cc;
        }

        .theme-card:nth-child(even) {
            border-left-color: #00cc99;
        }

        .theme-card h3 {
            font-size: 17px;
            color: #1a1a1a;
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .theme-card h3 i {
            color: #0088cc;
            font-size: 16px;
        }

        .theme-card:nth-child(even) h3 i {
            color: #00cc99;
        }

        .theme-card ol {
            margin: 0;
            padding-left: 1.2em;
            color: #444;
            font-size: 14px;
            line-height: 1.65;
        }

        .theme-card ol li {
            margin-bottom: 8px;
        }

        .theme-card ol li:last-child {
            margin-bottom: 0;
        }

        .theme-card .sub-list {
            list-style: none;
            margin: 10px 0 0;
            padding: 0;
        }

        .theme-card .sub-list li {
            position: relative;
            padding-left: 1em;
            margin-bottom: 8px;
            font-size: 13px;
            color: #555;
            line-height: 1.55;
        }

        .theme-card .sub-list li::before {
            content: "·";
            position: absolute;
            left: 0;
            color: #0088cc;
            font-weight: bold;
        }

        .theme-card--full {
            grid-column: 1 / -1;
        }

        .detail-footnote {
            background: #f3f6f9;
            border-radius: 12px;
            padding: 18px 22px;
            margin-top: 8px;
            font-size: 14px;
            color: #555;
            line-height: 1.65;
        }

        .detail-footnote strong {
            color: #1a1a1a;
        }

        .theme-card__text {
            margin: 0;
            font-size: 14px;
            color: #444;
            line-height: 1.65;
        }

        /* 联系弹窗（电话 / 微信二维码） */
        .contact-modal {
            position: fixed;
            inset: 0;
            z-index: 2000;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: max(16px, env(safe-area-inset-bottom));
            opacity: 0;
            visibility: hidden;
            pointer-events: none;
            transition: opacity 0.28s ease, visibility 0.28s ease;
        }

        .contact-modal.is-open {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
        }

        .contact-modal__backdrop {
            position: absolute;
            inset: 0;
            background: rgba(0, 0, 0, 0.45);
            cursor: pointer;
        }

        .contact-modal__panel {
            position: relative;
            z-index: 1;
            width: 100%;
            max-width: min(400px, 100%);
            background: #fff;
            border-radius: 16px;
            padding: 28px 24px 24px;
            box-shadow: 0 24px 64px rgba(0, 0, 0, 0.22);
            max-height: min(90vh, 640px);
            overflow-y: auto;
        }

        .contact-modal__panel--wechat {
            max-width: min(360px, 100%);
            text-align: center;
            padding-bottom: 20px;
        }

        .contact-modal__close {
            position: absolute;
            top: 12px;
            right: 12px;
            width: 40px;
            height: 40px;
            border: none;
            border-radius: 10px;
            background: #f0f2f5;
            color: #333;
            font-size: 22px;
            line-height: 1;
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: background 0.2s ease;
        }

        .contact-modal__close:hover {
            background: #e4e6ea;
        }

        .contact-modal__phone-text {
            font-size: clamp(18px, 4.2vw, 22px);
            color: #0088cc;
            font-weight: 700;
            line-height: 1.45;
            margin: 8px 0 0;
            padding-right: 36px;
            letter-spacing: 0.02em;
        }

        .contact-modal__hint {
            margin-top: 16px;
            font-size: 13px;
            color: #888;
            line-height: 1.5;
        }

        .contact-modal__qr {
            display: block;
            width: min(280px, 78vw);
            height: auto;
            margin: 12px auto 16px;
            border-radius: 8px;
            border: 1px solid #eee;
        }

        .contact-modal__wechat-title {
            font-size: 17px;
            font-weight: 600;
            color: #1a1a1a;
            margin: 0 32px 4px 0;
        }

        .contact-modal__wechat-sub {
            font-size: 14px;
            color: #666;
            margin: 0 32px 0 0;
        }

        body.contact-modal-open {
            overflow: hidden;
        }

        @media (max-width: 991px) {
            .product-hero {
                grid-template-columns: 1fr;
                align-items: stretch;
            }

            .product-hero__media {
                position: static;
                min-height: 320px;
                max-height: 400px;
            }

            .product-hero__intro {
                min-height: 0;
            }

            .product-hero__intro .product-actions {
                margin-top: 16px;
                padding-top: 0;
            }

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

            .theme-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 767px) {
            .product-main {
                padding: 20px 16px 40px;
            }

            .product-hero__intro {
                padding: 22px 20px;
            }

            .product-kpis {
                grid-template-columns: 1fr;
            }

            .param-table td:first-child {
                width: 44%;
                font-size: 13px;
            }

            .param-table td:last-child {
                font-size: 13px;
            }

            .product-actions {
                flex-direction: column;
            }

            .btn {
                width: 100%;
            }
        }