:root {
    --primary: #1565C0;
    --primary-dark: #0D3B66;
    --accent: #06B6D4;
    --text: #2B2F36;
    --text-light: #6B7280;
    --bg: #fff;
    --bg-light: #F4F7FB;
    --border: #E6EBF1;
    --footer-bg: #0D3B66;
    --footer-text: #C7D2DE;
    --radius: 8px;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text);
    line-height: 1.6;
    background: var(--bg);
}

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

html { scroll-behavior: smooth; }

::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: #EDF2F8; }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 6px; border: 2px solid #EDF2F8; }
::-webkit-scrollbar-thumb:hover { background: var(--primary-dark); }

html { scrollbar-width: thin; scrollbar-color: var(--primary) #EDF2F8; }

::selection { background: var(--primary); color: #fff; }

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Header */
.site-header {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    box-shadow: 0 2px 16px rgba(13,59,102,0.18);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo img {
    height: 42px;
    width: auto;
}

.logo-title {
    font-size: 22px;
    font-weight: 700;
    color: #fff;
    letter-spacing: 1px;
    text-shadow: 0 1px 4px rgba(0,0,0,0.25);
}

.logo-sub {
    font-size: 11px;
    color: rgba(255,255,255,0.72);
    text-transform: uppercase;
}

.welcome-text {
    font-size: 18px;
    font-weight: 600;
    color: #fff;
    padding: 5px 16px;
    border: 1px solid rgba(255,255,255,0.5);
    border-radius: 20px;
    background: rgba(255,255,255,0.12);
    white-space: nowrap;
    transform-origin: right center;
    animation: welcomeZoomIn 1.2s ease-out both;
}

@keyframes welcomeZoomIn {
    from {
        transform: scale(0.2);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.main-nav {
    background: var(--primary);
}

.main-nav .container {
    display: flex;
    justify-content: center;
    gap: 0;
}

.main-nav a {
    color: #fff;
    padding: 14px 32px;
    font-size: 15px;
    transition: background 0.2s;
    position: relative;
}

.main-nav a::after {
    content: '';
    position: absolute;
    left: 32px;
    right: 32px;
    bottom: 10px;
    height: 2px;
    background: var(--accent);
    border-radius: 2px;
    transform: scaleX(0);
    transform-origin: center;
    transition: transform 0.3s ease;
}

.main-nav a:hover::after,
.main-nav a.active::after {
    transform: scaleX(1);
}

.main-nav a:hover,
.main-nav a.active {
    background: var(--primary-dark);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: #fff;
}

/* Hero */
.hero-banner {
    position: relative;
    overflow: hidden;
    background: #0D3B66;
}

.banner-slider .swiper-slide {
    position: relative;
    aspect-ratio: 1327 / 742;
    height: auto;
    max-height: 742px;
}

.banner-slider img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 1;
}

/* 首页封面照片全部露出：移除蓝色叠层与网格，图片完整透出 */
.banner-slider .swiper-slide::after {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 2;
    background-image: none;
}

/* Swiper Navigation */
.banner-slider .swiper-button-prev,
.banner-slider .swiper-button-next {
    width: 44px; height: 44px;
    background: rgba(0,0,0,0.4);
    border-radius: 50%;
    color: #fff;
    transition: background 0.3s;
}
.banner-slider .swiper-button-prev:hover,
.banner-slider .swiper-button-next:hover {
    background: rgba(0,0,0,0.7);
}
.banner-slider .swiper-button-prev::after,
.banner-slider .swiper-button-next::after {
    font-size: 18px; font-weight: bold;
}

.banner-slider .swiper-pagination-bullet {
    width: 10px; height: 10px;
    background: rgba(255,255,255,0.5);
    opacity: 1;
    transition: all 0.3s;
}
.banner-slider .swiper-pagination-bullet-active {
    background: #06B6D4;
    width: 28px; border-radius: 5px;
}

.banner-caption {
    position: absolute;
    right: 10%;
    bottom: 20%;
    color: #fff;
    text-align: right;
    display: inline-block;
    max-width: min(82%, 520px);
    padding: 22px 30px;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(13,59,102,0.34) 0%, rgba(21,101,192,0.16) 100%);
    -webkit-backdrop-filter: blur(8px);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(6,182,212,0.45);
    box-shadow: 0 10px 34px rgba(0,0,0,0.28);
    text-shadow: 0 1px 6px rgba(0,0,0,0.45);
}

.banner-caption h2 {
    font-size: clamp(28px, 6vw, 72px);
    font-weight: 800;
    letter-spacing: 8px;
    color: #06B6D4;
    text-shadow: 0 0 18px rgba(6,182,212,0.55), 0 2px 10px rgba(0,0,0,0.5);
}

.banner-caption p {
    font-size: clamp(13px, 2.2vw, 24px);
    letter-spacing: 4px;
    color: #9CCFF0;
}

/* Quick Nav */
.quick-nav {
    padding: 80px 0;
    background: var(--bg);
}

.quick-nav .container {
    display: flex;
    justify-content: center;
    gap: clamp(40px, 9vw, 200px);
}

.quick-card {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 16px;
    color: var(--text);
    transition: transform 0.3s, color 0.3s;
    text-decoration: none;
}

.quick-card:hover {
    color: var(--primary);
    transform: translateY(-6px);
}

.quick-icon {
    width: 130px;
    height: 130px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    position: relative;
    overflow: hidden;
    border-radius: 16px;
    box-shadow: inset 0 0 0 1px rgba(6,182,212,0.22);
    transition: transform 0.3s, box-shadow 0.3s;
}

.quick-card:hover .quick-icon {
    transform: scale(1.06);
    box-shadow: inset 0 0 0 1px rgba(6,182,212,0.55);
}

.quick-icon img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: opacity 0.3s;
}

.quick-icon .quick-img-default {
    opacity: 1;
    z-index: 1;
}

.quick-icon .quick-img-hover {
    opacity: 0;
    z-index: 2;
}

.quick-card:hover .quick-icon .quick-img-default {
    opacity: 0;
}

.quick-card:hover .quick-icon .quick-img-hover {
    opacity: 1;
}

.quick-icon .quick-fallback {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary);
}

.quick-card span {
    font-size: 20px;
    font-weight: 500;
    letter-spacing: 1px;
    white-space: nowrap;
}

/* Cooperation */
.cooperation-section {
    padding: 80px 0;
    background-color: var(--bg-light);
    background-image:
        linear-gradient(rgba(21,101,192,0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(21,101,192,0.035) 1px, transparent 1px);
    background-size: 48px 48px;
    position: relative;
    overflow: hidden;
    border-top: 1px solid transparent;
    border-image: linear-gradient(90deg, transparent, rgba(6,182,212,0.5), transparent) 1;
}

.cooperation-section::before {
    content: '';
    position: absolute;
    top: -120px;
    left: -100px;
    width: 360px;
    height: 360px;
    background: radial-gradient(circle, rgba(6,182,212,0.10), transparent 70%);
    pointer-events: none;
}

.cooperation-section .container {
    position: relative;
    z-index: 1;
}

.section-title {
    text-align: center;
    margin-bottom: 44px;
    position: relative;
}

.section-title h3 {
    font-size: 28px;
    color: var(--text);
    margin-bottom: 8px;
}

.section-title span {
    font-size: 13px;
    color: var(--text-light);
    letter-spacing: 3px;
    text-transform: uppercase;
}

.section-title::after {
    content: '';
    display: block;
    width: 64px;
    height: 3px;
    margin: 16px auto 0;
    border-radius: 3px;
    background: linear-gradient(90deg, transparent 0%, var(--primary) 28%, var(--accent) 72%, transparent 100%);
    box-shadow: 0 0 12px rgba(6,182,212,0.55);
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.case-grid.large {
    grid-template-columns: repeat(4, 1fr);
}

.case-card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow), inset 0 0 0 1px rgba(21,101,192,0.10);
    transition: transform 0.2s;
    text-decoration: none;
    color: inherit;
    display: block;
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 30px rgba(21, 101, 192, 0.18), inset 0 0 0 1px rgba(21,101,192,0.20);
}

.case-img {
    height: 160px;
    overflow: hidden;
    background: #EDF2F8;
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.case-card:hover .case-img img {
    transform: scale(1.05);
}

.case-placeholder {
    font-size: 32px;
    color: var(--primary);
    font-weight: 700;
}

.case-info {
    padding: 16px;
    text-align: center;
}

.case-info h4 {
    font-size: 15px;
    margin-bottom: 6px;
    color: var(--text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.case-date {
    font-size: 12px;
    color: var(--text-light);
}

/* Case hover overlay - transparent blue with text on hover */
.case-card {
    position: relative;
}

.case-hover-overlay {
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(156,207,240,0.68) 0%, rgba(123,188,237,0.70) 50%, rgba(90,163,216,0.72) 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    opacity: 0;
    transition: opacity 0.35s ease;
    pointer-events: none;
}

.case-card:hover .case-hover-overlay {
    opacity: 1;
}

.case-hover-text {
    text-align: center;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.case-hover-text h4 {
    font-size: 16px;
    font-weight: 600;
    color: #fff;
    text-shadow: 0 1px 6px rgba(0,0,0,0.25);
    margin-bottom: 8px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.case-hover-text p {
    font-size: 13px;
    line-height: 1.6;
    color: #eef8ff;
    text-shadow: 0 1px 5px rgba(0,0,0,0.2);
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.case-hover-action {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 22px;
    border: 1px solid rgba(255,255,255,0.6);
    border-radius: 20px;
    color: #fff;
    font-size: 13px;
    background: rgba(255,255,255,0.12);
    backdrop-filter: blur(4px);
    margin-top: 12px;
    transition: all 0.3s;
}

.case-card:hover .case-hover-action {
    background: rgba(255,255,255,0.25);
    border-color: #fff;
}

.case-hover-action i {
    font-style: normal;
    font-family: Arial, sans-serif;
    transition: transform 0.3s;
}

.case-card:hover .case-hover-action i {
    transform: translateX(3px);
}

.section-more {
    text-align: center;
    margin-top: 36px;
}

/* Intro */
.intro-section {
    padding: 80px 0;
    background-color: #fff;
    background-image:
        linear-gradient(rgba(21,101,192,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(21,101,192,0.03) 1px, transparent 1px);
    background-size: 48px 48px;
    position: relative;
    overflow: hidden;
    border-top: 1px solid transparent;
    border-image: linear-gradient(90deg, transparent, rgba(6,182,212,0.4), transparent) 1;
}

.intro-section::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -120px;
    width: 380px;
    height: 380px;
    background: radial-gradient(circle, rgba(21,101,192,0.08), transparent 70%);
    pointer-events: none;
}

.intro-section .container {
    position: relative;
    z-index: 1;
}

.intro-text {
    max-width: 760px;
    margin: 0 auto;
    text-align: center;
}

.intro-text h3 {
    font-size: 28px;
    margin-bottom: 20px;
    color: var(--primary);
}

.intro-text p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.8;
}

/* Page Header */
.page-header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #fff;
    padding: 60px 0;
    text-align: center;
}

.page-header h1 {
    font-size: 36px;
    margin-bottom: 10px;
}

.page-header p {
    opacity: 0.9;
}

.page-content {
    padding: 50px 0;
    background: var(--bg-light);
    min-height: 400px;
}

/* Buttons */
.btn-primary, .btn-outline, .btn-detail, .btn-back, .btn-small {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 24px;
    border-radius: var(--radius);
    font-size: 14px;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 22px rgba(21,101,192,0.35);
}

.btn-outline {
    background: transparent;
    border: 1px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 8px 22px rgba(21,101,192,0.28);
}

.btn-detail {
    background: var(--accent);
    color: #fff;
    padding: 8px 18px;
}

.btn-detail:hover {
    background: #0891B2;
}

.btn-back {
    background: #fff;
    border: 1px solid var(--border);
    color: var(--text);
}

.btn-back:hover {
    border-color: var(--primary);
    color: var(--primary);
}

/* Product Showcase */
.product-showcase-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 36px 40px;
}

.product-showcase-card {
    display: block;
    text-decoration: none;
    color: inherit;
    transition: transform 0.3s;
}

.product-showcase-card:hover {
    transform: translateY(-6px);
}

.product-showcase-card:hover .product-showcase-inner {
    box-shadow: 0 16px 42px rgba(21, 101, 192, 0.30);
}

.product-showcase-inner {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    background: #EDF2F8;
    aspect-ratio: 16 / 10;
    box-shadow: 0 8px 30px rgba(21, 101, 192, 0.18);
}

/* HUD 渐变描边环（hover 显形） */
.product-showcase-inner::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 24px;
    padding: 1.5px;
    background: linear-gradient(135deg, var(--accent), rgba(21,101,192,0.12) 45%, rgba(21,101,192,0.12) 55%, var(--primary));
    -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
    -webkit-mask-composite: xor;
            mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.35s ease;
    pointer-events: none;
    z-index: 4;
}

/* 对角扫光（hover 触发） */
.product-showcase-inner::after {
    content: '';
    position: absolute;
    top: 0;
    left: -60%;
    width: 55%;
    height: 100%;
    background: linear-gradient(115deg, transparent 0%, rgba(255,255,255,0.30) 50%, transparent 100%);
    transform: skewX(-18deg);
    transition: left 0.7s ease;
    pointer-events: none;
    z-index: 3;
}

.product-showcase-card:hover .product-showcase-inner::before { opacity: 1; }
.product-showcase-card:hover .product-showcase-inner::after { left: 130%; }

.product-showcase-visual {
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.product-showcase-visual img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s;
}

.product-showcase-card:hover .product-showcase-visual img {
    transform: scale(1.05);
}

.product-showcase-placeholder {
    font-size: 48px;
    color: rgba(0,0,0,0.3);
    font-weight: 700;
}

/* Overlay - hidden by default, fades in on hover */
.product-showcase-overlay {
    position: absolute;
    top: 0; left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(156,207,240,0.65) 0%, rgba(123,188,237,0.68) 50%, rgba(90,163,216,0.70) 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: space-between;
    padding: 28px 32px 24px;
    opacity: 0;
    transition: opacity 0.35s ease;
    z-index: 2;
}

.product-showcase-card:hover .product-showcase-overlay {
    opacity: 1;
}

.product-showcase-text {
    width: 100%;
    text-align: center;
}

.product-showcase-text h4 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
    color: #fff;
    text-shadow: 0 1px 6px rgba(0,0,0,0.25);
}

.product-showcase-text p {
    font-size: 14px;
    line-height: 1.7;
    color: #eef8ff;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-shadow: 0 1px 5px rgba(0,0,0,0.2);
}

.product-showcase-action span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 28px;
    border: 1px solid rgba(255,255,255,0.6);
    border-radius: 24px;
    color: #fff;
    font-size: 15px;
    background: rgba(255,255,255,0.12);
    backdrop-filter: blur(4px);
    transition: all 0.3s;
}

.product-showcase-card:hover .product-showcase-action span {
    background: rgba(255,255,255,0.25);
    border-color: #fff;
}

.product-showcase-action .arrow {
    font-style: normal;
    font-family: Arial, sans-serif;
    transition: transform 0.3s;
}

.product-showcase-card:hover .product-showcase-action .arrow {
    transform: translateX(4px);
}

.product-showcase-caption {
    text-align: center;
    font-size: 18px;
    font-weight: 500;
    color: var(--text);
    margin-top: 18px;
    letter-spacing: 1px;
}

@media (max-width: 768px) {
    .product-showcase-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }
    .product-showcase-inner {
        aspect-ratio: 4 / 3;
    }
    .product-showcase-overlay {
        padding: 22px 20px 18px;
    }
    .product-showcase-text h4 {
        font-size: 17px;
    }
    .product-showcase-text p {
        font-size: 13px;
        -webkit-line-clamp: 2;
    }
}

/* Solution Grid */
/* Solutions now reuse .product-showcase-* classes */

/* Detail Layout */
.detail-layout {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 30px;
}

.detail-sidebar {
    position: sticky;
    top: 140px;
    align-self: start;
}

.sidebar-card {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
}

.detail-thumb {
    height: 220px;
    overflow: hidden;
    border-radius: var(--radius);
    margin-bottom: 20px;
    background: #EDF2F8;
    display: flex;
    align-items: center;
    justify-content: center;
}

.detail-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.placeholder-large {
    font-size: 48px;
    color: var(--primary);
    font-weight: 700;
}

.detail-summary {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 16px;
}

.detail-main {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 36px;
}

.detail-content h2 {
    font-size: 22px;
    margin-bottom: 18px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--accent);
    display: inline-block;
}

.content-block {
    margin-bottom: 36px;
}

.detail-nav {
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

/* Article Detail */
.article-detail {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 36px;
}

.article-hero {
    height: 320px;
    overflow: hidden;
    border-radius: var(--radius);
    margin-bottom: 28px;
}

.article-hero img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.article-body {
    font-size: 15px;
    line-height: 1.8;
}

.article-nav {
    margin-top: 36px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

/* Rich Text */
.rich-text {
    color: var(--text);
}

.rich-text p {
    margin-bottom: 14px;
}

.rich-text table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    font-size: 14px;
}

.rich-text table th,
.rich-text table td {
    border: 1px solid #E6EBF1;
    padding: 10px 12px;
    text-align: left;
    vertical-align: top;
}

.rich-text table th {
    background: #EDF2F8;
    font-weight: 600;
}

.rich-text img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 16px 0;
}

.rich-text strong {
    color: var(--primary-dark);
}

/* Timeline */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 180px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--accent);
}

.timeline-item {
    display: flex;
    margin-bottom: 36px;
    position: relative;
}

.timeline-year {
    width: 170px;
    flex-shrink: 0;
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
    text-align: right;
    padding-right: 40px;
    white-space: nowrap;
}

.timeline-content {
    flex: 1;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 24px;
    margin-left: 20px;
}

.timeline-content h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--primary-dark);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: 172px;
    top: 6px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--accent);
    border: 3px solid #fff;
    box-shadow: 0 0 0 2px var(--accent);
}

/* Footer */
.site-footer {
    position: relative;
    background: var(--footer-bg);
    color: var(--footer-text);
    padding: 50px 0 20px;
    font-size: 13px;
}

.site-footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
}

.footer-section {
    text-align: center;
    margin-bottom: 30px;
}

.footer-section h4 {
    color: #fff;
    font-size: 18px;
    margin-bottom: 16px;
}

.footer-section p {
    margin-bottom: 6px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.footer-bottom p {
    margin-bottom: 6px;
}

.footer-bottom a {
    color: var(--footer-text);
    position: relative;
    transition: color 0.25s;
}

.footer-bottom a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -2px;
    width: 100%;
    height: 1px;
    background: #fff;
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 0.25s ease;
}

.footer-bottom a:hover {
    color: #fff;
}

.footer-bottom a:hover::after {
    transform: scaleX(1);
}

/* Responsive */
@media (max-width: 1024px) {
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .case-grid, .case-grid.large { grid-template-columns: repeat(3, 1fr); }
    .detail-layout { grid-template-columns: 1fr; }
    .detail-sidebar { position: static; }
}

@media (max-width: 768px) {
    .main-nav { display: none; }
    .mobile-menu-toggle { display: flex; }
    .welcome-text { font-size: 22px; }
    .logo-title { font-size: 16px; }
    .logo img { height: 40px; }
    .banner-slider .swiper-slide { max-height: 360px; }
    .banner-caption h2 { font-size: clamp(24px, 8vw, 40px); }
    .banner-caption p { font-size: clamp(12px, 3.2vw, 18px); }
    .quick-nav { padding: 60px 0; }
    .quick-nav .container { gap: 80px; flex-wrap: wrap; }
    .quick-icon { width: 110px; height: 110px; }
    .quick-icon .quick-fallback { font-size: 36px; }
    .quick-card span { font-size: 16px; }
    .product-grid, .case-grid, .case-grid.large { grid-template-columns: 1fr; }
    .timeline::before { left: 20px; }
    .timeline-year { width: auto; text-align: left; padding-right: 0; white-space: nowrap; }
    .timeline-content { margin-left: 40px; }
    .timeline-item::before { left: 12px; }
}

/* ===== 视觉精修：滚动入场动画（仅在 JS 启用时隐藏，避免无脚本时内容不可见） ===== */
.js .reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s cubic-bezier(0.22, 0.61, 0.36, 1),
                transform 0.7s cubic-bezier(0.22, 0.61, 0.36, 1);
}

.js .reveal.in-view {
    opacity: 1;
    transform: none;
}

/* 卡片进入后切换为快速 transform，保留 hover 上移手感，并重置 stagger 延迟 */
.case-card.in-view,
.quick-card.in-view,
.product-showcase-card.in-view {
    transition: opacity 0.7s ease, transform 0.25s ease;
}

.case-card:hover,
.quick-card:hover,
.product-showcase-card:hover {
    transition-delay: 0s !important;
}

@media (prefers-reduced-motion: reduce) {
    .reveal {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }
}

/* ===== 视觉精修：头部滚动毛玻璃 ===== */
.site-header.scrolled {
    background: rgba(13,59,102,0.82);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    box-shadow: 0 4px 24px rgba(13,59,102,0.25);
}

/* ===== 视觉精修：窄屏欢迎语收敛 ===== */
@media (max-width: 768px) {
    .welcome-text {
        font-size: 14px;
        padding: 4px 12px;
    }
}