:root {
    --c-primary: #091b33;
    --c-primary-mid: #0f2d52;
    --c-primary-light: #1a4178;
    --c-primary-lighter: #185A56;
    --c-gold: #185A56;
    --c-gold-light: #185A56;
    --c-gold-dark: #185A56;
    --c-gold-muted: rgba(24,90,86,0.12);
    --c-accent: #185A56;
    --c-success: #185A56;
    --c-info: #185A56;
    --c-text: #1c1c1c;
    --c-text-secondary: #3d3d3d;
    --c-text-tertiary: #6b6b6b;
    --c-text-muted: #9a9a9a;
    --c-border: #dcdcdc;
    --c-border-light: #ebebeb;
    --c-bg: #f2f3f5;
    --c-bg-warm: #f8f7f5;
    --c-bg-cream: #faf8f4;
    --c-white: #ffffff;
    --c-sky: #185A56;
    --g-primary: linear-gradient(135deg, #185A56 0%, #1a6b66 40%, #217a74 100%);
    --g-primary-dark: linear-gradient(160deg, #0e3d3a 0%, #185A56 60%, #185A56 100%);
    --g-gold: linear-gradient(135deg, #8a6d28 0%, #a88532 40%, #c9a84e 100%);
    --g-dark: linear-gradient(160deg, #080810 0%, #0e1525 50%, #141e33 100%);
    --g-warm: linear-gradient(180deg, #faf8f4 0%, #f2f3f5 100%);
    --g-banner-1: linear-gradient(135deg, #185A56 0%, #1a6b66 25%, #185A56 55%, #217a74 85%, #2a8f88 100%);
    --g-banner-2: linear-gradient(135deg, #0e3d3a 0%, #185A56 30%, #1a6b66 60%, #217a74 100%);
    --g-banner-3: linear-gradient(135deg, #0e3d3a 0%, #185A56 30%, #1a6b66 60%, #217a74 100%);
    --g-news-img: linear-gradient(135deg, #0e3d3a 0%, #185A56 100%);
    --g-academic-img: linear-gradient(135deg, #185A56 0%, #185A56 100%);
    --g-research-img: linear-gradient(135deg, #185A56 0%, #185A56 100%);
    --g-topic-1: linear-gradient(135deg, #185A56 0%, #217a74 100%);
    --g-topic-2: linear-gradient(135deg, #1a6b66 0%, #185A56 100%);
    --g-topic-3: linear-gradient(135deg, #185A56 0%, #0e3d3a 100%);
    --g-topic-4: linear-gradient(135deg, #217a74 0%, #185A56 100%);
    --sp-xs: 4px;
    --sp-sm: 8px;
    --sp-md: 16px;
    --sp-lg: 24px;
    --sp-xl: 32px;
    --sp-2xl: 48px;
    --sp-3xl: 72px;
    --sp-4xl: 96px;
    
    --shadow-xs: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.07);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.09);
    --shadow-xl: 0 16px 48px rgba(0,0,0,0.11);
    --shadow-nav: 0 2px 16px rgba(0,0,0,0.18);
    --ease: cubic-bezier(0.4, 0, 0.2, 1);
    --ease-out: cubic-bezier(0.0, 0, 0.2, 1);
    --duration: 0.3s;
    --duration-slow: 0.5s;
}

*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    color: var(--c-text);
    background: var(--c-bg);
    line-height: 1.75;
    min-height: 100vh;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--duration) var(--ease);
}

ul, ol { list-style: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, select { font-family: inherit; }

::selection {
    background: var(--c-primary-mid);
    color: var(--c-white);
}

.container {
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 48px;
}

.top-header {
    padding: 14px 0;
    position: relative;
    background: #185A56;
}

.top-header::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    right: 0;
    height: 3px;
}

.top-header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 18px;
}

.logo-img {
    width: auto;
    object-fit: contain;
}

.logo-text h1 {
    font-size: 28px;
    color: var(--c-white);
    font-weight: 700;
    letter-spacing: 5px;
    line-height: 1.3;
}

.logo-text p {
    font-size: 11px;
    color: rgba(255,255,255,0.8);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-top: 3px;
}

.search-area {
    display: flex;
    align-items: center;
}

.top-links {
    display: flex;
    align-items: center;
    gap: 0;
    margin-right: 0;
    margin-left: 16px;
    border-right: 1px solid rgba(255,255,255,0.2);
    padding-right: 16px;
}

.top-link {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--c-white);
    font-size: 14px;
    padding: 8px 16px;
    transition: all var(--duration) var(--ease);
}

.top-link:hover {
    background: rgba(255,255,255,0.1);
}

.fa-home,
.fa.fa-home {
    display: inline-block;
    width: 16px;
    height: 16px;
    position: relative;
}

.fa-home::before,
.fa.fa-home::before {
    content: '';
    position: absolute;
    left: 0;
    top: 4px;
    width: 0;
    height: 0;
    border-left: 8px solid transparent;
    border-right: 8px solid transparent;
    border-bottom: 7px solid currentColor;
}

.fa-home::after,
.fa.fa-home::after {
    content: '';
    position: absolute;
    left: 1px;
    top: 9px;
    width: 14px;
    height: 7px;
    background: currentColor;
}

.search-area input {
    width: 280px;
    height: 42px;
    border: 2px solid rgba(255,255,255,0.25);
    border-right: none;
    padding: 0 18px;
    font-size: 14px;
    outline: none;
    transition: border-color var(--duration) var(--ease), box-shadow var(--duration) var(--ease);
    color: var(--c-text);
    background: rgba(255,255,255,0.92);
    border-radius: 10px 0px 0px 10px;
}

.search-area input::placeholder { color: var(--c-text-muted); }
.search-area input:focus {
    border-color: rgba(253,116,45,0.5);
    box-shadow: inset 0 0 0 1px rgba(253,116,45,0.15);
    background: #fff;
}

.search-area button {
    width: 42px;
    height: 42px;
    padding: 0;
    background: rgba(255,255,255,0.08);
    border: 2px solid rgba(255,255,255,0.25);
    border-left: none;
    color: transparent;
    font-size: 0;
    cursor: pointer;
    position: relative;
    transition: all var(--duration) var(--ease);
    border-radius: 0px 10px 10px 0px;
}

.search-area button::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-60%, -60%);
    width: 14px;
    height: 14px;
    border: 2px solid #fff;
    border-radius: 50%;
}

.search-area button::after {
    content: '';
    position: absolute;
    right: 8px;
    bottom: 8px;
    width: 8px;
    height: 2px;
    background: #fff;
    transform: rotate(45deg);
}

.search-area button:hover {
    background: rgba(255,255,255,0.1);
}

.main-nav {
    background: #186d68;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-nav);
}

.main-nav::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    opacity: 0.4;
}

.main-nav .container {
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-list {
    display: flex;
    justify-content: center;
    width: 100%;
}

.nav-list li {
    flex: none;
    padding: 0;
}

.nav-list li a {
    display: block;
    color: rgba(255,255,255,0.9);
    padding: 16px 35px;
    font-size: 20px;
    letter-spacing: 1.5px;
    transition: all var(--duration) var(--ease);
    position: relative;
    font-weight: 500;
    white-space: nowrap;
}

.nav-list li a:hover,
.nav-list li a.active {
    background: rgba(255,255,255,0.08);
    color: var(--c-white);
}

.mobile-menu-btn {
    display: none;
    color: var(--c-white);
    font-size: 26px;
    cursor: pointer;
    padding: 16px 20px;
}

.nav-logo { display: none; }
.nav-logo-img { display: block; height: 40px; width: auto; object-fit: contain; }

.nav-list li.has-sub {
    position: relative;
}
.sub-toggle-icon { display: none; }

.nav-list li.has-sub:hover > a {
    background: rgba(255,255,255,0.08);
}

.nav-list li.has-sub .sub-nav {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 100%;
    background: linear-gradient(180deg, #185A56 0%, #165550 100%);
    box-shadow: 0 8px 32px rgba(0,0,0,0.15), 0 2px 8px rgba(24,90,86,0.1);
    padding: 8px 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all var(--duration) var(--ease);
    z-index: 2000;
    border-radius: 0 0 4px 4px;
}

.nav-list li.has-sub:hover .sub-nav {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-list li.has-sub .sub-nav li {
    padding: 0;
}

.nav-list li.has-sub .sub-nav li a {
    display: block;
    padding: 12px 35px;
    color: rgba(255,255,255,0.85);
    font-size: 16px;
    letter-spacing: 1.5px;
    white-space: nowrap;
    transition: all var(--duration) var(--ease);
    position: relative;
    border-left: 3px solid transparent;
}

.nav-list li.has-sub .sub-nav li a:hover {
    background: rgba(255,255,255,0.1);
    color: #fff;
}

.nav-list li.has-sub .sub-nav li.has-sub {
    position: relative;
}

.nav-list li.has-sub .sub-nav li.has-sub > .sub-nav {
    position: absolute;
    top: 0;
    left: 100%;
    min-width: 100%;
    opacity: 0;
    visibility: hidden;
    transform: translateX(-10px);
    transition: all var(--duration) var(--ease);
}

.nav-list li.has-sub .sub-nav li.has-sub:hover > .sub-nav {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
}

.nav-list li.has-sub .sub-nav li.has-sub > .sub-nav li a {
    padding: 10px 24px;
    font-size: 16px;
}

.section-header {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-bottom: var(--sp-2xl);
}

.section-header.flex-row {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-end;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--c-border);
    position: relative;
}

.section-header.flex-row::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, #185A56, transparent);
}

.section-header h2 {
    font-size: 40px;
    font-weight: 600;
    letter-spacing: 4px;
    position: relative;
    display: flex;
    align-items: center;
}

.section-header h2::before,
.section-header h2::after {
    content: '';
    width: 300px;
    height: 1px;
    background: #185A56;
}

.section-header h2 .dot-left,
.section-header h2 .dot-right {
    width: 8px;
    height: 8px;
    background: #185A56;
    border-radius: 50%;
    margin: 0 12px;
}

.section-header.flex-row h2 {
    font-size: 28px;
    color: var(--c-primary);
    letter-spacing: 3px;
}

.section-header.flex-row h2::before,
.section-header.flex-row h2::after {
    display: none;
}

.section-header.no-lines h2::before,
.section-header.no-lines h2::after {
    display: none;
}

.section-header.no-lines h2 .dot-left,
.section-header.no-lines h2 .dot-right {
    display: none;
}

.section-header h2 .title-black { color: #185A56; }
.section-header h2 .title-blue { color: #FD742D; }

.section-header .more-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    margin-top: 14px;
    padding: 4px 0;
    cursor: pointer;
}

.section-header .more-wrapper .line {
    width: 220px;
    height: 1px;
    background: #185A56;
    flex-shrink: 0;
}

.section-header .more-wrapper .arrow {
    color: #185A56;
    font-size: 22px;
    flex-shrink: 0;
    margin: 0 7px;
    line-height: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    transform: translateY(-2px);
    transition: transform var(--duration) var(--ease);
}

.section-header .more-wrapper:hover .arrow {
    transform: translateY(-2px) scale(1.2);
}

.section-header .more-wrapper .arrow:last-of-type {
    transform: translateY(-2px) scaleX(-1);
}

.section-header .more-link {
    font-size: 14px;
    color: #333;
    letter-spacing: 2px;
    padding: 0 12px;
    flex-shrink: 0;
    line-height: 1;
}

.page-banner {
    background: var(--g-primary);
    padding: 180px 0;
    text-align: center;
    color: var(--c-white);
    position: relative;
    overflow: hidden;
    background-image: url(../images/ny-banner1.jpg);
}
.page-banner2 {
    background: var(--g-primary);
    padding: 180px 0;
    text-align: center;
    color: var(--c-white);
    position: relative;
    overflow: hidden;
    background-image: url(../images/ny-banner2.jpg);
}
.page-banner3 {
    background: var(--g-primary);
    padding: 180px 0;
    text-align: center;
    color: var(--c-white);
    position: relative;
    overflow: hidden;
    background-image: url(../images/ny-banner3.jpg);
}
.page-banner::before {
    content: '';
    position: absolute;
    top: -60%;
    right: -8%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(24,90,86,0.12) 0%, transparent 65%);
}

.page-banner::after {
    content: '';
    position: absolute;
    bottom: -40%;
    left: -6%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(24,90,86,0.08) 0%, transparent 65%);
}

.page-banner h2 {
    font-size: 40px;
    letter-spacing: 8px;
    margin-bottom: 14px;
    position: relative;
    z-index: 1;
    font-weight: 700;
}

.page-banner p {
    font-size: 15px;
    opacity: 0.65;
    letter-spacing: 3px;
    position: relative;
    z-index: 1;
}

.breadcrumb {
    background: var(--c-white);
    padding: 14px 0;
    border-bottom: 1px solid var(--c-border-light);
}

.breadcrumb a {
    color: var(--c-text-tertiary);
    font-size: 13px;
    letter-spacing: 0.5px;
    transition: color var(--duration) var(--ease);
}

.breadcrumb a:hover { color: var(--c-gold); }

.breadcrumb span {
    color: var(--c-text-muted);
    font-size: 13px;
    margin: 0 8px;
}

.sidebar {
    width: 370px;
    flex-shrink: 0;
}

.sidebar-nav {
    /*! background: var(--c-white); */
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.sidebar-nav h3 {
    background: var(--g-primary);
    color: var(--c-white);
    padding: 90px 28px;
    font-size: 30px;
    letter-spacing: 3px;
    font-weight: 600;
    position: relative;
    border-radius: 0px 20px 0px 0px;
}

.sidebar-nav h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 28px;
    right: 28px;
    height: 2px;
    background: #185A56;
    opacity: 0.4;
}

.sidebar-nav ul li a {
    display: block;
    padding: 15px 28px;
    font-size: 18px;
    color: var(--c-text-secondary);
    border-bottom: 1px solid var(--c-border-light);
    transition: all var(--duration) var(--ease);
    position: relative;
    letter-spacing: 1px;
}

.sidebar-nav ul li a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--c-gold);
    transform: scaleY(0);
    transition: transform var(--duration) var(--ease);
}

.sidebar-nav ul li a:hover,
.sidebar-nav ul li a.active {
    color: var(--c-primary);
    background: rgba(24,90,86,0.1);
    padding-left: 34px;
}

.sidebar-nav ul li a:hover::before,
.sidebar-nav ul li a.active::before {
    transform: scaleY(1);
}

/* 三级导航样式 */
.sidebar-nav .has-sub {
    position: relative;
}

.sidebar-nav .has-sub > a {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.sidebar-nav .has-sub > a::after {
    content: '\25BC';
    font-size: 10px;
    transition: transform var(--duration) var(--ease);
    color: var(--c-text-muted);
}

.sidebar-nav .has-sub.open > a::after {
    transform: rotate(180deg);
}

.sidebar-nav .sub-nav {
	display: none;
    background: rgba(24,90,86,0.05);
    margin-left: 28px;
    display: none;
    padding-left: 10px;
    margin: 6px 0;
}
.sidebar-nav li.active > .sub-nav {
    display: block;
}

.sidebar-nav .has-sub.open .sub-nav {
    display: block;
}

.sidebar-nav .sub-nav li a {
    padding: 12px 28px;
    font-size: 15px;
    color: var(--c-text-secondary);
    border-bottom: 1px solid rgba(0,0,0,0.05);
    transition: all var(--duration) var(--ease);
}

.sidebar-nav .sub-nav li a:hover {
    color: var(--c-primary);
    background: rgba(24,90,86,0.1);
    padding-left: 32px;
}

.sidebar-nav .sub-nav li a.active {
    color: var(--c-primary);
    background: rgba(24,90,86,0.1);
    font-weight: 600;
}

.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: var(--sp-2xl);
    padding-top: var(--sp-lg);
    border-top: 1px solid var(--c-border-light);
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 14px;
    border: 1px solid var(--c-border);
    font-size: 14px;
    color: var(--c-text-secondary);
    transition: all var(--duration) var(--ease);
}

.pagination a:hover {
    border-color: var(--c-primary);
    color: var(--c-primary);
    box-shadow: var(--shadow-xs);
}

.pagination span.active {
    background: var(--g-primary);
    color: var(--c-white);
    border-color: transparent;
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}

.pagination span.disabled {
    color: var(--c-text-muted);
    cursor: not-allowed;
    opacity: 0.6;
}

.footer {
    color: rgba(255,255,255,0.7);
    padding: 64px 0 28px;
    margin-top: 0;
    position: relative;
    background-position: center center;
    background-size: cover;
    background-repeat: no-repeat;
    transition: all 0.5s;
    background-image: url('../images/footer.jpg');
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding-bottom: 36px;
    margin-bottom: 28px;
}

.footer-info {
    display: flex;
    align-items: flex-start;
    gap: 48px;
}

.footer-info h3 {
    color: var(--c-white);
    font-size: 22px;
    margin-bottom: 18px;
    letter-spacing: 4px;
    font-weight: 600;
    position: relative;
    display: inline-block;
}

.footer-info h3::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 80px;
    height: 2px;
    background: #fff;
}

.footer-info p {
    font-size: 16px;
    line-height: 2.4;
    letter-spacing: 0.5px;
    color: #fff;
}

.footer-info p span {
    margin-right: 8px;
    color: #185A56;
}

.footer-qrcode {
    flex-shrink: 0;
    margin-top: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.footer-qrcode img {
    width: 120px;
    height: 120px;
    border: 2px solid rgba(255,255,255,0.1);
}

.footer-qrcode p {
    font-size: 16px;
    color: #fff;
    line-height: 1.6 !important;
}

.footer-links {
    display: flex;
    gap: 72px;
}

.footer-links .link-group h4 {
    color: #fff;
    font-size: 20px;
    margin-bottom: 16px;
    letter-spacing: 2px;
    font-weight: 600;
    position: relative;
    display: inline-block;
}

.footer-links .link-group h4::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 60px;
    height: 2px;
    background: #fff;
}

.footer-links .link-group a {
    display: block;
    font-size: 16px;
    color: rgba(255,255,255,0.7);
    line-height: 2.4;
    transition: all var(--duration) var(--ease);
    letter-spacing: 0.5px;
}

.footer-links .link-group a:hover { color: #185A56; padding-left: 4px; }

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 15px;
    color: rgba(255,255,255,1);
    line-height: 2.2;
    letter-spacing: 0.5px;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.4);
}

.footer-copyright { text-align: left; }
.footer-support { text-align: right; }

/* ===== RESPONSIVE: Large screens ===== */
@media (min-width: 1600px) {
    .container { padding: 0px; }
}

/* ===== RESPONSIVE: Desktop / small desktop ===== */
@media (max-width: 1200px) {
    .container { padding: 0 28px; }
    .footer-links { gap: 48px; }
    .nav-list li a { padding: 16px 28px; font-size: 18px; }
    .section-header h2::before,
    .section-header h2::after { width: 220px; }
    .section-header .more-wrapper .line { width: 180px; }
}

/* ===== RESPONSIVE: Tablet landscape / iPad landscape ===== */
@media (max-width: 1024px) {
    .container { padding: 0 20px; }
    .sidebar { width: 100%; }
    .sidebar-nav ul { display: flex; flex-wrap: wrap; }
    .sidebar-nav ul li a { border-bottom: none; border-right: 1px solid var(--c-border-light); }
    
    /* 三级导航在平板设备上的样式 */
    .sidebar-nav .has-sub {
        position: relative;
    }
    
    .sidebar-nav .has-sub .sub-nav {
        position: absolute;
        top: 100%;
        left: 0;
        min-width: 200px;
        background: var(--c-white);
        box-shadow: var(--shadow-md);
        z-index: 100;
    }
    
    .sidebar-nav .has-sub.open .sub-nav {
        display: block;
    }

    .nav-list li a { padding: 14px 22px; font-size: 17px; }

    .logo-img { max-width: 75%; }
    .search-area input { width: 220px; }

    .section-header h2 { font-size: 32px; }
    .section-header h2::before,
    .section-header h2::after { width: 160px; }
    .section-header.flex-row h2 { font-size: 24px; }
    .section-header .more-wrapper .line { width: 140px; }
    .section-header .more-wrapper .arrow { margin: 0 6px; }

    .footer-content { flex-direction: column; gap: 32px; }
    .footer-info { gap: 24px; }
    .footer-links { gap: 36px; }
}

/* ===== RESPONSIVE: Tablet portrait / iPad portrait ===== */
@media (max-width: 768px) {
    .container { padding: 0 16px; }

    /* --- Header: 学校主页+搜索 横排一行 --- */
    .top-header { padding: 8px 0; }
    .top-header::after { height: 1px; }
    .top-header .container {
        flex-direction: row;
        flex-wrap: wrap;
        justify-content: center;
        align-items: center;
        gap: 6px;
    }
    .logo-area { display: none; }
    .search-area {
        flex-wrap: nowrap;
        justify-content: center;
        align-items: center;
        gap: 0;
    }
    .top-links {
        margin-left: 0;
        margin-right: 10px;
        padding-right: 10px;
    }
    .top-link { font-size: 13px; padding: 6px 10px; }
    .search-area input {
        width: 160px;
        height: 36px;
        font-size: 13px;
        border-radius: 8px 0 0 8px;
    }
    .search-area button {
        height: 36px;
        width: 36px;
        border-radius: 0 8px 8px 0;
    }

    /* --- Navigation: logo左 汉堡右 --- */
    .mobile-menu-btn {
        display: block;
        padding: 10px 16px;
        font-size: 28px;
        line-height: 1;
        color: #fff;
        background: none;
        border: none;
        cursor: pointer;
        order: 2;
        transition: all 0.3s ease;
    }
    .mobile-menu-btn.active {
        color: #fd742d;
    }
    .main-nav .container {
        flex-wrap: wrap;
        justify-content: space-between !important;
        align-items: center;
    }
    .nav-list {
        display: none;
        flex-direction: column;
        width: 100%;
        order: 3;
    }
    .nav-list.show { display: flex; }
    .nav-list li a {
        padding: 14px 20px;
        text-align: left;
        border-bottom: 1px solid rgba(255,255,255,0.06);
        letter-spacing: 1.5px;
        font-size: 17px;
    }
    /* 导航栏内logo左侧显示 */
    .nav-logo {
        display: flex;
        align-items: center;
        order: 1;
        padding: 6px 0;
        flex-shrink: 0;
    }
    .nav-logo-img {
        height: 38px;
        width: auto;
    }
    /* Mobile sub-nav: collapsible */
    .nav-list li.has-sub .sub-nav {
        display: none;
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        border-top: none;
        background: rgba(0,0,0,0.2);
        padding: 0 0 0 20px;
        transition: none;
    }
    .nav-list li.has-sub.sub-open > .sub-nav { display: block; }
    .nav-list li.has-sub .sub-nav li a {
        font-size: 15px;
        padding: 12px 20px;
    }
    .nav-list li.has-sub > a { position: relative; cursor: pointer; }
    .nav-list li.has-sub > a .sub-toggle-icon {
        display: inline-block;
        position: absolute;
        right: 20px;
        top: 50%;
        transform: translateY(-50%);
        font-size: 12px;
        color: rgba(255,255,255,0.6);
        transition: transform 0.3s ease;
        pointer-events: none;
    }
    .nav-list li.has-sub.sub-open > a .sub-toggle-icon {
        transform: translateY(-50%) rotate(90deg);
    }
    /* Third-level sub-nav on mobile */
    .nav-list li.has-sub .sub-nav li.has-sub > .sub-nav {
        display: none;
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        background: rgba(0,0,0,0.15);
        padding: 0 0 0 20px;
        transition: none;
    }
    .nav-list li.has-sub .sub-nav li.has-sub.sub-open > .sub-nav {
        display: block;
    }

    /* --- Section headers --- */
    .section-header { margin-bottom: 32px; }
    .section-header h2 { font-size: 24px; letter-spacing: 2px; }
    .section-header h2::before,
    .section-header h2::after { width: 90px; }
    .section-header h2 .dot-left,
    .section-header h2 .dot-right { width: 6px; height: 6px; margin: 0 8px; }
    .section-header.flex-row { padding-bottom: 14px; }
    .section-header.flex-row h2 { font-size: 22px; letter-spacing: 2px; }
    .section-header.flex-row::after { width: 70px; }
    .section-header .more-wrapper { margin-top: 10px; }
    .section-header .more-wrapper .line { width: 90px; }
    .section-header .more-wrapper .arrow { font-size: 18px; margin: 0 5px; }
    .section-header .more-link { font-size: 13px; letter-spacing: 1px; padding: 0 8px; }

    /* --- Page banner --- */
    .page-banner { padding: 52px 0; }
    .page-banner h2 { font-size: 28px; letter-spacing: 4px; }
    .page-banner p { font-size: 13px; }

    /* --- Footer --- */
    .footer { padding: 48px 0 24px; }
    .footer-content {
        flex-direction: column;
        gap: 32px;
        padding-bottom: 28px;
        margin-bottom: 20px;
    }
    .footer-info { flex-direction: column; gap: 20px; }
    .footer-info h3 { font-size: 18px; letter-spacing: 2px; }
    .footer-info h3::after { width: 60px; }
    .footer-info p { font-size: 14px; line-height: 2; }
    .footer-qrcode { margin-top: 0; align-items: flex-start; }
    .footer-qrcode img { width: 100px; height: 100px; }
    .footer-qrcode p { font-size: 14px !important; }
    .footer-links { flex-direction: column; gap: 24px; }
    .footer-links .link-group h4 { font-size: 17px; letter-spacing: 1px; }
    .footer-links .link-group h4::after { width: 40px; }
    .footer-links .link-group a { font-size: 14px; line-height: 2; }
    .footer-bottom {
        flex-direction: column;
        gap: 8px;
        text-align: center;
        font-size: 13px;
        padding-top: 16px;
    }
    .footer-copyright, .footer-support { text-align: center; }
}

/* ===== RESPONSIVE: Mobile phone ===== */
@media (max-width: 480px) {
    .container { padding: 0 12px; }

    /* --- Header: 小屏手机 --- */
    .top-header { padding: 6px 0; }
    .top-header .container { gap: 4px; }
    .search-area input { width: 120px; height: 32px; font-size: 12px; }
    .search-area button { height: 32px; width: 32px; }
    .top-links { margin-right: 6px; padding-right: 6px; }
    .top-link { font-size: 12px; padding: 4px 6px; }

    /* --- Navigation --- */
    .mobile-menu-btn { padding: 8px 12px; font-size: 24px; }
    .nav-logo-img { height: 32px; }
    .nav-list li a { padding: 12px 16px; font-size: 16px; }
    .nav-list li.has-sub .sub-nav li a { font-size: 14px; padding: 10px 16px; }

    /* --- Section headers --- */
    .section-header { margin-bottom: 24px; }
    .section-header h2 { font-size: 20px; letter-spacing: 1px; }
    .section-header h2::before,
    .section-header h2::after { width: 50px; }
    .section-header h2 .dot-left,
    .section-header h2 .dot-right { width: 5px; height: 5px; margin: 0 6px; }
    .section-header.flex-row { padding-bottom: 12px; }
    .section-header.flex-row h2 { font-size: 18px; letter-spacing: 1px; }
    .section-header.flex-row::after { width: 50px; height: 2px; }
    .section-header .more-wrapper { margin-top: 8px; }
    .section-header .more-wrapper .line { width: 50px; }
    .section-header .more-wrapper .arrow { font-size: 16px; margin: 0 4px; }
    .section-header .more-link { font-size: 12px; letter-spacing: 1px; padding: 0 6px; }

    /* --- Page banner --- */
    .page-banner { padding: 40px 0; }
    .page-banner h2 { font-size: 22px; letter-spacing: 2px; }
    .page-banner p { font-size: 12px; }

    /* --- Footer --- */
    .footer { padding: 36px 0 20px; }
    .footer-content { gap: 24px; padding-bottom: 20px; margin-bottom: 16px; }
    .footer-info h3 { font-size: 16px; }
    .footer-info p { font-size: 13px; line-height: 1.8; }
    .footer-qrcode img { width: 80px; height: 80px; }
    .footer-qrcode p { font-size: 13px !important; }
    .footer-links { gap: 20px; }
    .footer-links .link-group h4 { font-size: 15px; }
    .footer-links .link-group a { font-size: 13px; line-height: 1.8; }
    .footer-bottom { font-size: 12px; padding-top: 12px; }
}