/* ========== Reset & Base ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --color-dark: #231f20;
    --color-darker: #0f0f0f;
    --color-text-body: #58595b;
    --color-text-nav: #6d6e71;
    --color-orange: #f8951d;
    --color-white: #ffffff;
    --color-bg-light: #e6e7e8;
    --color-bg-gray: #e6e7e8;
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
    width: 100%;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    color: #333;
    line-height: 1.6;
    background: #fff;
    overflow-x: hidden;
    width: 100%;
    max-width: 100vw;
    padding-top: 130px;
}

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

ul {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

.container {
    max-width: 1350px;
    margin: 0 auto;
    padding: 0 10px;
}

/* 编辑器内容区消除左右内边距，与顶/底部宽度一致 */
.article.fullwidth-content .padding-large {
    padding: 30px 0;
}

/* 编辑器表格强制全宽，清除左右边距，确保与顶/底部宽度一致 */
.article.fullwidth-content .post table,
.article.fullwidth-content .post table[width] {
    width: 100% !important;
    max-width: 100% !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
}

/* ========== Header / Navigation ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    max-width: 100vw;
    margin-bottom:10px;
    z-index: 1000;
    background: rgba(255,255,255,0.98);
    box-shadow: 0 1px 6px rgba(0,0,0,0.08);
    transition: var(--transition);
}

    .header .container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 80px;
    }
.header-left-group {
    display: flex;
    align-items: flex-end; /* �� Logo �� Nav �����¶��� */
    gap: 30px; /* Logo �� Nav ֮��ļ�� */
}
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    height: 100%;
}

.header .logo img {
    height: 50px;
    width: auto;
    /* ���ϣ��ͼƬ�� 130px �Ŀռ��￿����ʾ�� */
    /* margin-top: auto; */
    /* ���߼򵥵��ڸ��� .logo ʹ�� align-items: flex-end */
}

.header nav {
    /* ˮƽ���򣺿������ (��������� flex �����е�λ��) */
    /* ע�⣺��Ϊ justify-content: space-between��nav �ᱻ���� logo �� nav-right �м� */
    /* ���ϣ�� nav ���� logo�����·��ġ����ײ��֡�˵�� */
    /* ��ֱ���򣺿��¶��� */
    align-items: baseline;
    margin-left: 50px;
    /* ��ѡ�����ײ���һ���࣬��������̫�� 
    margin-bottom: 20px;*/
}


.nav-menu {
    display: flex;
    gap: 36px;
}

    .nav-menu > li {
        position: relative;
    }

        .nav-menu > li > a {
            color: var(--color-text-nav);
            font-size: 15px;
            display: flex;
            align-items: center;
            gap: 4px;
            transition: var(--transition);
            position: relative;
            padding: 4px 0;
        }

            .nav-menu > li > a:hover,
            .nav-menu > li.active > a,
            .nav-menu > li.royal-active > a {
                color: var(--color-orange);
            }

                .nav-menu > li.active > a::after,
                .nav-menu > li.royal-active > a::after {
                    content: '';
                    position: absolute;
                    bottom: -4px;
                    left: 0;
                    width: 100%;
                    height: 2px;
                    background: var(--color-orange);
                }

.nav-arrow {
    font-size: 15px;
    opacity: 0.6;
    display: inline-block;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-menu > li:hover > a .nav-arrow,
.nav-menu > li.active > a .nav-arrow,
.nav-menu > li.royal-active > a .nav-arrow,
.nav-menu > li.expanded > a .nav-arrow {
    transform: rotate(180deg);
    opacity: 1;
}

/* Dropdown */
.dropdown {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    background: #fff;
    min-width: 160px;
    border-radius: 8px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.12);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1001;
    white-space: nowrap;
}

    .dropdown::before {
        content: '';
        position: absolute;
        top: -6px;
        left: 50%;
        transform: translateX(-50%) rotate(45deg);
        width: 12px;
        height: 12px;
        background: #fff;
    }

.nav-menu > li:hover .dropdown,
.nav-menu > li.expanded .dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.dropdown li a {
    display: block;
    padding: 10px 20px;
    font-size: 14px;
    color: #555;
    transition: var(--transition);
}

    .dropdown li a:hover {
        color: var(--color-orange);
        background: #fff8ef;
    }

.nav-right {
    display: flex;
    align-items: center;
    align-self: flex-end;
    gap: 16px;
    margin-bottom: 15px;
    margin-left: auto;
}
nav::after {
  content: '';
  display: block;
  clear: both;
}
.nav-lang-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.nav-lang {
    color: #555;
    font-size: 14px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 4px;
    transition: var(--transition);
}

    .nav-lang:hover {
        color: var(--color-orange);
    }

    .nav-lang svg {
        width: 16px;
        height: 16px;
        fill: currentColor;
    }

.lang-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    background: #fff;
    min-width: 120px;
    border-radius: 8px;
    box-shadow: 0 6px 20px rgba(0,0,0,0.12);
    padding: 6px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    z-index: 1001;
    list-style: none;
    margin-top: 8px;
}

    .nav-lang-wrapper:hover .lang-dropdown {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .lang-dropdown li {
        padding: 8px 18px;
        font-size: 14px;
        color: #555;
        cursor: pointer;
        transition: all 0.2s ease;
        white-space: nowrap;
    }

        .lang-dropdown li:hover {
            color: var(--color-orange);
            background: #f9f9f9;
        }

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
    background: none;
    border: none;
}

    .mobile-toggle span {
        width: 25px;
        height: 3px;
        background: #333;
        transition: var(--transition);
    }

/* ========== Hero (background-image + text) ========== */
.hero {
    position: relative;
    height: calc(100vh - 80px);
    min-height: 550px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--color-darker) url('../images/herobg.jpg') center / cover no-repeat;
    margin-top: -50px;
}

    .hero::after {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: linear-gradient(180deg, rgba(15,15,15,0.6) 0%, rgba(15,15,15,0.4) 50%, rgba(15,15,15,0.8) 100%);
    }

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 700px;
    padding: 0 20px;
}

.hero-title {
    font-size: 42px;
    font-weight: bold;
    color: var(--color-white);
    margin-bottom: 20px;
    letter-spacing: 2px;
}

.hero-subtitle {
    font-size: 18px;
    color: #e0e0e0;
    margin-bottom: 36px;
    line-height: 1.8;
}

.hero-btn {
    display: inline-block;
    padding: 14px 40px;
    background: var(--color-orange);
    color: var(--color-white);
    font-size: 16px;
    border-radius: 30px;
    transition: var(--transition);
    border: 2px solid var(--color-orange);
}

    .hero-btn:hover {
        background: transparent;
        color: var(--color-orange);
    }

.hero-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 3;
}

.hero-dot {
    width: 30px;
    height: 3px;
    background: rgba(255,255,255,0.3);
    border-radius: 2px;
    cursor: pointer;
    transition: var(--transition);
}

    .hero-dot.active {
        background: var(--color-orange);
        width: 40px;
    }

/* ========== Section Common ========== */
.section {
    padding: 40px 0;
}

.section-title {
    font-size: 32px;
    font-weight: bold;
    margin-bottom: 20px;
    position: relative;
}

    .section-title.center {
        text-align: center;
    }

        .section-title.center::after {
            content: '';
            display: block;
            width: 50px;
            height: 3px;
            background: var(--color-orange);
            margin: 15px auto 0;
        }

.btn-more {
    display: inline-block;
    padding: 12px 36px;
    background: var(--color-orange);
    color: var(--color-white);
    font-size: 15px;
    border-radius: 30px;
    transition: var(--transition);
    border: 2px solid var(--color-orange);
}

    .btn-more:hover {
        background: transparent;
        color: var(--color-orange);
    }

/* ========== Tech Center ========== */
.tech-center {
    background: var(--color-white);
}

.tech-intro {
    text-align: center;
    max-width: 1000px;
    margin: 0 auto 50px;
    color: var(--color-text-body);
    font-size: 15px;
    line-height: 1.8;
}

.tech-cards {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    max-width: 900px;
    margin: 0 auto;
}

.tech-card {
    position: relative;
    background: var(--color-white);
    border-radius: 0;
    overflow: hidden;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    transition: var(--transition);
}

    .tech-card:hover {
        transform: translateY(-6px);
        box-shadow: 0 8px 24px rgba(0,0,0,0.15);
    }

.tech-card a {
    display: block;
    line-height: 0;
}

.tech-card-img {
    width: 100%;
    height: 260px;
    object-fit: cover;
    display: block;
}

.tech-card-body {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    /*background: rgba(26, 74, 138, 0.5);*/
    padding: 0;
    line-height: normal;
}
.tech-card:hover .tech-card-body {
    background-color: #007bff; 
}
.tech-card-title {
    text-align: center;
    font-size: 18px;
    font-weight: 500;
    color: #ffffff;
    padding: 14px 10px;
    margin: 0;
    letter-spacing: 1px;
}

.tech-card-desc {
    font-size: 13px;
    color: var(--color-text-body);
    line-height: 1.6;
}

/* ========== Album Grid ========== */
.album-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin: 0 10px;
    padding: 0;
}

.album-item {
    display: flex;
    flex-direction: column;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    background: var(--color-white);
    overflow: hidden;
    transition: box-shadow 0.3s ease, border-color 0.3s ease;
}

.album-item:hover {
    border-color: #c0c0c0;
    box-shadow: 0 4px 16px rgba(0,0,0,0.12);
}

.album-img-wrap {
    width: 100%;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #f5f5f5;
    border-bottom: 1px solid #e0e0e0;
}

.album-img-wrap img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    display: block;
}

.album-caption {
    margin: 0;
    padding: 10px 12px;
    font-size: 14px;
    color: var(--color-text-body);
    line-height: 1.5;
    text-align: center;
    word-break: break-word;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

@media (max-width: 1024px) {
    .album-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 768px) {
    .album-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
    .album-grid { grid-template-columns: 1fr; }
}

/* ========== Core Advantage - Carousel ========== */
.core-advantage {
    background: var(--color-bg-light);
    overflow: hidden;
}

.core-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 1350px;
    margin: 0 auto 40px;
}

.core-item {
    min-width: 0;
}

.core-item-link {
    display: block;
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

    .core-item-link:hover {
        transform: translateY(-4px);
    }

.core-item-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
    margin-bottom: 12px;
}

.core-item-body {
    padding: 0 4px;
}

.core-item-title {
    font-size: 16px;
    font-weight: bold;
    margin-bottom: 8px;
    color: var(--color-dark);
    line-height: 1.4;
}

.core-item-text {
    font-size: 13px;
    color: var(--color-text-body);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 4;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.core-more {
    text-align: center;
    margin-bottom: 20px;
}

/* ========== About Section ========== */
.about-section {
    background: var(--color-white);
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: start;
}

.about-text h2 {
    font-size: 30px;
    font-weight: bold;
    margin-bottom: 15px;
    color: var(--color-dark);
}

.about-text p {
    font-size: 14px;
    color: var(--color-text-body);
    line-height: 2;
    margin-bottom: 16px;
}

.about-video {
    position: relative;
    margin-top: 63px;
    overflow: hidden;
}

    .about-video img,
    .about-video video {
        width: 640px;
        height: 355px;
        object-fit: cover;
    }

.play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%,-50%);
    width: 60px;
    height: 60px;
    background: rgba(248,149,29,0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
}

    .play-btn:hover {
        background: var(--color-orange);
        transform: translate(-50%,-50%) scale(1.1);
    }

    .play-btn::after {
        content: '';
        border-style: solid;
        border-width: 12px 0 12px 20px;
        border-color: transparent transparent transparent #fff;
        margin-left: 4px;
    }

/* ========== Base Layout (background-image + text) ========== */
.base-layout {
    position: relative;
    min-height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
    overflow: hidden;
    background: url('../images/base-map.png') center / cover no-repeat;
}

    .base-layout::after {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background: linear-gradient(135deg, rgba(248,149,29,0.75) 0%, rgba(180,120,20,0.8) 100%);
    }

.base-map-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    background-image: radial-gradient(circle, rgba(255,255,255,0.5) 1.5px, transparent 1.5px);
    background-size: 14px 14px;
    background-position: center;
    -webkit-mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1000 500'%3E%3Cpath fill='black' d='M150 180 Q200 120 300 140 L380 130 Q420 100 460 130 L520 120 Q560 90 600 120 L680 130 Q720 100 760 140 L840 150 Q880 130 900 180 L880 220 Q840 240 800 220 L740 240 Q700 260 660 240 L580 250 Q540 270 500 250 L420 260 Q380 280 340 260 L280 250 Q240 270 200 250 L160 240 Q140 220 150 180 Z'/%3E%3C/svg%3E");
    mask-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1000 500'%3E%3Cpath fill='black' d='M150 180 Q200 120 300 140 L380 130 Q420 100 460 130 L520 120 Q560 90 600 120 L680 130 Q720 100 760 140 L840 150 Q880 130 900 180 L880 220 Q840 240 800 220 L740 240 Q700 260 660 240 L580 250 Q540 270 500 250 L420 260 Q380 280 340 260 L280 250 Q240 270 200 250 L160 240 Q140 220 150 180 Z'/%3E%3C/svg%3E");
    -webkit-mask-repeat: no-repeat;
    mask-repeat: no-repeat;
    -webkit-mask-size: 70% auto;
    mask-size: 70% auto;
    -webkit-mask-position: center;
    mask-position: center;
    opacity: 0.6;
}

.base-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 1000px;
    padding: 0 20px;
}

    .base-content h2 {
        font-size: 36px;
        font-weight: bold;
        margin-bottom: 20px;
    }

    .base-content p {
        font-size: 15px;
        line-height: 1.8;
        text-align:center;
        color: rgba(255,255,255,0.85);
    }

.btn-base {
    display: inline-block;
    padding: 12px 36px;
    background: rgba(255,255,255,0.95);
    color: var(--color-orange);
    font-size: 15px;
    border-radius: 30px;
    border: none;
    transition: var(--transition);
    font-weight: bold;
}

    .btn-base:hover {
        background: var(--color-orange);
        color: var(--color-white);
        transform: translateY(-2px);
    }

/* ========== News Center ========== */
.news-center {
    background: var(--color-white);
}

.news-section-title {
    text-align: left;
    margin-bottom: 12px;
}

.news-intro {
    text-align: left;
    color: var(--color-text-body);
    font-size: 15px;
    margin-bottom: 40px;
}

.news-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-bottom: 40px;
}

.news-card {
    transition: var(--transition);
    background: transparent;
    display: flex;
}

    .news-card:hover {
        transform: translateY(-4px);
    }

.news-card-link {
    display: flex;
    flex-direction: column;
    width: 100%;
    text-decoration: none;
    color: inherit;
}

.news-card-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
    margin-bottom: 16px;
}

.news-card-body {
    padding: 0 4px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.news-card-title {
    font-size: 17px;
    font-weight: bold;
    margin-bottom: 10px;
    color: var(--color-dark);
    line-height: 1.5;
}

.news-card-text {
    font-size: 13px;
    color: var(--color-text-body);
    line-height: 1.7;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card-date {
    font-size: 12px;
    color: var(--color-text-body);
    margin-top: auto;
}

.news-more {
    text-align: center;
}

/* ========== Footer ========== */
/* ========== Footer ========== */
.footer {
    background: var(--color-bg-gray);
    padding: 40px 0 30px;
}

.footer-logo-row {
    margin-bottom: 25px;
}

    .footer-logo-row .logo {
        display: flex;
        align-items: center;
        gap: 10px;
    }

.footer-top {
    display: flex;
    gap: 0;
    align-items: flex-start;
}

.footer-brand {
    flex: 0 0 22%;
    padding-right: 25px;
}

    .footer-brand .footer-company {
        font-size: 14px;
        font-weight: bold;
        color: var(--color-dark);
        margin-bottom: 8px;
    }

    .footer-brand p {
        font-size: 12px;
        color: var(--color-text-body);
        line-height: 1.8;
    }

.footer-separator {
    width: 1px;
    background: #0f0f0f;
    align-self: stretch;
    min-height: 120px;
    margin:0 50px;
}

.footer-nav {
    flex: 1;
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 15px;
    padding: 0 35px;
  
}

.footer-col h4 {
    font-size: 14px;
    font-weight: bold;
    margin-bottom: 10px;
    color: var(--color-dark);
}

.footer-col ul li {
    margin-bottom: 2px;
}

    .footer-col ul li a {
        font-size: 12px;
        color: var(--color-text-body);
        transition: var(--transition);
        display: flex;
        align-items: center;
        gap: 4px;
    }

        .footer-col ul li a:hover {
            color: var(--color-orange);
        }

        .footer-col ul li a::after {
            content: '>';
            font-size: 16px;
            color: #737272;
            transition: var(--transition);
            transform: translateY(-2px);
        }

        .footer-col ul li a:hover::after {
            color: var(--color-orange);
        }

.footer-right {
    flex: 0 0 120px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.footer-qr {
    width: 90px;
    height: 90px;
    border-radius: 6px;
}

.footer-social {
    display: flex;
    gap: 6px;
    align-items: center;
    justify-content: center;
}

    .footer-social img {
        cursor: pointer;

        /*opacity: 0.6;
            
        transition: var(--transition);*/
    }

        .footer-social img:hover {
            opacity: 1;
        }


/* ========== Responsive: Tablet ========== */
@media (max-width: 1024px) {
    .tech-cards {
        grid-template-columns: repeat(2, 1fr);
    }

    .core-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }

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

    .footer-top {
        flex-direction: column;
        align-items: center;
        gap: 25px;
    }

    .footer-brand {
        flex: none;
        width: 100%;
        max-width: 500px;
        text-align: center;
        padding-right: 0;
    }

    .footer-separator {
        display: none;
    }

    .footer-nav {
        flex: none;
        width: 100%;
        grid-template-columns: repeat(3, 1fr);
        padding: 10px 0;
        gap: 18px 12px;
        align-items: start;
        justify-items: center;
    }

    .footer-col {
        width: 100%;
        text-align: center;
    }

    .footer-col h4 {
        text-align: center;
        margin-bottom: 10px;
    }

    .footer-col ul li a {
        justify-content: center;
    }

    .footer-right {
        flex: none;
        width: 100%;
        flex-direction: row;
        justify-content: center;
        gap: 20px;
        padding-top: 10px;
        border-top: 1px solid rgba(0,0,0,0.08);
    }

    .hero-title {
        font-size: 34px;
    }

    .hero-subtitle {
        font-size: 16px;
    }
}

/* ========== Responsive: Mobile ========== */
@media (max-width: 768px) {
    html, body {
        max-width: 100vw;
        overflow-x: hidden;
    }

    body {
        padding-top: 72px;
    }

    .header .container {
        height: 72px;
        overflow-x: hidden;
    }

    .header .logo img {
        height: 50px;
    }

    .header-left-group {
        align-items: center;
        gap: 15px;
    }

    .header nav {
        margin-left: 0;
    }

    .nav-right {
        margin-bottom: 0;
        margin-top: 8px;
        margin-left: auto;
        align-self: center;
        gap: 10px;
    }

    .mobile-toggle {
        display: flex;
    }

    .nav-lang {
        font-size: 12px;
    }

    .nav-lang svg {
        width: 14px;
        height: 14px;
    }

    .lang-dropdown {
        min-width: 100px;
    }

        .lang-dropdown li {
            padding: 6px 14px;
            font-size: 12px;
        }

    .nav-menu {
        display: none;
        flex-direction: column;
        position: fixed;
        top: 72px;
        left: 0;
        width: 100%;
        background: #fff;
        padding: 10px 20px 20px;
        box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        gap: 0;
        max-height: calc(100vh - 72px);
        overflow-y: auto;
        z-index: 999;
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu > li {
        width: 100%;
        border-bottom: 1px solid #eee;
    }

    .nav-menu > li > a {
        padding: 12px 0;
        font-size: 15px;
        justify-content: space-between;
    }

    .nav-menu > li > a .nav-arrow {
        transition: transform 0.3s ease;
    }

    .nav-menu > li.expanded > a .nav-arrow {
        transform: rotate(180deg);
    }

    /* 移动端下拉菜单 */
    .nav-menu .dropdown {
        position: static;
        transform: none;
        opacity: 1;
        visibility: visible;
        box-shadow: none;
        border-radius: 0;
        padding: 0;
        min-width: auto;
        display: none;
        background: #f9f9f9;
    }

    .nav-menu > li.expanded .dropdown {
        display: block;
        transform: none !important;
    }

    .nav-menu .dropdown::before {
        display: none;
    }

    .nav-menu .dropdown li a {
        padding: 10px 20px;
        font-size: 14px;
    }

    /* 内页横向栏目导航移动端美化 */
    .nav-x {
        padding: 25px 0 15px;
        background: #fff;
        border-bottom: 1px solid #f0f0f0;
    }

    .nav-x .container {
        padding: 0 15px;
    }

    .nav-x .menu-toggle {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }

    .nav-x .menu-toggle h3 {
        display: block;
        font-size: 22px;
        font-weight: 600;
        color: var(--color-dark, #1a1a2e);
        margin: 0;
        text-align: center;
        letter-spacing: 1px;
    }

    .nav-x .menu-toggle .button {
        order: 1;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 6px;
        height: 36px;
        padding: 0 16px;
        background: #f8f8f8;
        border: 1px solid #e8e8e8;
        border-radius: 18px;
        color: #666;
        font-size: 13px;
        font-weight: normal;
        line-height: 1;
        cursor: pointer;
        transition: all 0.25s ease;
    }

    .nav-x .menu-toggle .button:hover,
    .nav-x .menu-toggle .button.active {
        background: var(--color-orange, #ff9600);
        border-color: var(--color-orange, #ff9600);
        color: #fff;
    }

    .nav-x .menu-toggle .button i {
        font-size: 14px;
        transition: transform 0.25s ease;
    }

    .nav-x .menu-toggle .button.active i {
        transform: rotate(180deg);
    }

    .nav-x .nav-navicon {
        display: none;
        order: 2;
        width: 100%;
        max-width: 320px;
        margin: 5px 0 0;
        padding: 8px 0;
        list-style: none;
        background: #fafafa;
        border: 1px solid #eee;
        border-radius: 8px;
        box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    }

    .nav-x .nav-navicon li {
        display: block;
        width: 100%;
        float: none;
        padding: 0;
        margin: 0;
    }

    .nav-x .nav-navicon li a {
        display: block;
        padding: 10px 16px;
        font-size: 13px;
        color: #555;
        text-align: center;
        line-height: 1.5;
        transition: all 0.2s ease;
        border-bottom: 1px solid #f0f0f0;
    }

    .nav-x .nav-navicon li:last-child a {
        border-bottom: none;
    }

    .nav-x .nav-navicon li a:hover,
    .nav-x .nav-navicon li a.active {
        background: #fff;
        color: var(--color-orange, #ff9600);
    }

    /* pintuer.js 切换时会移除 nav-navicon 类，此时显示列表 */
    .nav-x .menu-toggle ul:not(.nav-navicon) {
        display: block;
    }

    .mobile-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .mobile-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .mobile-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    .nav-lang {
        font-size: 12px;
    }

    .hero {
        height: calc(100vh - 22px);
        min-height: 400px;
    }

    .hero-title {
        font-size: 24px;
        letter-spacing: 1px;
    }

    .hero-subtitle {
        font-size: 14px;
        margin-bottom: 24px;
    }

    .hero-btn {
        padding: 10px 28px;
        font-size: 14px;
    }

    .section {
        padding: 50px 0;
    }

    .section-title {
        font-size: 24px;
        margin-bottom: 30px;
    }

    .tech-intro {
        font-size: 13px;
        margin-bottom: 30px;
    }

    .tech-cards {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .tech-card-img {
        height: 200px;
    }

    .core-grid {
        grid-template-columns: 1fr;
        gap: 24px;
        margin-bottom: 30px;
    }

    .core-item-img {
        height: 180px;
    }

    .core-item-text {
        -webkit-line-clamp: 3;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .about-text h2 {
        font-size: 24px;
    }

    .about-text p {
        font-size: 13px;
        line-height: 1.8;
    }

    .about-video img,
    .about-video video {
        width: 100%;
        height: 240px;
    }

    .base-layout {
        min-height: 350px;
    }

    .base-content h2 {
        font-size: 26px;
    }

    .base-content p {
        font-size: 13px;
    }

    .news-cards {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .news-card-img {
        height: 180px;
    }

    .footer {
        padding: 30px 0 20px;
    }

    .footer-logo-row {
        text-align: center;
        margin-bottom: 20px;
    }

    .footer-logo-row .logo {
        justify-content: center;
    }

    .footer-logo-row .logo img {
        height: 70px;
    }

    .footer-top {
        flex-direction: column;
        align-items: center;
        gap: 22px;
    }

    .footer-brand {
        flex: none;
        width: 100%;
        max-width: 100%;
        text-align: center;
        padding-right: 0;
    }

    .footer-brand p {
        font-size: 12px;
        line-height: 1.9;
    }

    .footer-separator {
        display: none;
    }

    .footer-nav {
        flex: none;
        width: 100%;
        grid-template-columns: repeat(3, 1fr);
        padding: 15px 0;
        gap: 14px 10px;
        align-items: start;
        justify-items: center;
        border-top: 1px solid rgba(0,0,0,0.08);
        border-bottom: 1px solid rgba(0,0,0,0.08);
    }

    .footer-col {
        width: 100%;
        text-align: center;
    }

    .footer-col h4 {
        font-size: 13px;
        margin-bottom: 8px;
        text-align: center;
    }

    .footer-col ul li {
        margin-bottom: 5px;
    }

    .footer-col ul li a {
        font-size: 11px;
        justify-content: center;
    }

    .footer-right {
        flex: none;
        width: 100%;
        flex-direction: row;
        justify-content: center;
        gap: 15px;
    }

    .footer-qr {
        width: 70px;
        height: 70px;
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}

/* ========== Responsive: Small Mobile ========== */
@media (max-width: 480px) {
    .logo-text .logo-en {
        font-size: 16px;
    }

    .logo-text .logo-sub {
        font-size: 9px;
    }

    .logo-icon {
        width: 32px;
        height: 32px;
    }

    .hero-title {
        font-size: 20px;
    }

    .hero-subtitle {
        font-size: 12px;
    }

    .hero-btn {
        padding: 8px 24px;
        font-size: 13px;
    }

    .section {
        padding: 40px 0;
    }

    .section-title {
        font-size: 20px;
        margin-bottom: 20px;
    }

    .tech-card-img {
        height: 160px;
    }

    .tech-card-title {
        font-size: 16px;
    }

    .core-item-img {
        height: 150px;
    }

    .base-content h2 {
        font-size: 22px;
    }

    .base-content p {
        font-size: 12px;
    }

    .footer-logo-row .logo img {
        height: 55px;
    }

    .footer-top {
        gap: 18px;
    }

    .footer-nav {
        grid-template-columns: repeat(3, 1fr);
        gap: 12px 8px;
        padding: 12px 0;
    }

    .footer-col h4 {
        font-size: 12px;
        margin-bottom: 6px;
    }

    .footer-col ul li a {
        font-size: 10px;
    }

    .footer-right {
        flex-direction: column;
        align-items: center;
        gap: 10px;
    }

    .footer-qr {
        width: 60px;
        height: 60px;
    }

    .footer-qr {
        width: 60px;
        height: 60px;
    }
}