/* ============================================
   南京神雕起重设备有限公司 - 官网样式表
   配色：工业红 + 深灰
   ============================================ */

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

:root {
    --primary: #c8161e;
    --primary-dark: #a01015;
    --primary-light: #e8404a;
    --secondary: #2b2b2b;
    --gray-dark: #333;
    --gray: #666;
    --gray-light: #999;
    --bg-light: #f5f5f5;
    --bg-gray: #e8e8e8;
    --white: #fff;
    --border: #e0e0e0;
    --shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s ease;
    --max-width: 1200px;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    color: var(--gray-dark);
    background: var(--white);
    line-height: 1.6;
    overflow-x: hidden;
}

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

a:hover {
    color: var(--primary);
}

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

ul, ol {
    list-style: none;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

.clearfix::after {
    content: "";
    display: block;
    clear: both;
}

/* ===== Section Title ===== */
.section-title {
    text-align: center;
    padding: 50px 0 30px;
}

.section-title h2 {
    font-size: 30px;
    color: var(--gray-dark);
    font-weight: 700;
    position: relative;
    display: inline-block;
    padding-bottom: 15px;
}

.section-title h2::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}

.section-title p {
    margin-top: 12px;
    font-size: 14px;
    color: var(--gray-light);
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* ===== Header ===== */
.header {
    background: var(--white);
    box-shadow: 0 1px 6px rgba(0, 0, 0, 0.06);
    position: relative;
    z-index: 100;
}

.header-top {
    background: var(--secondary);
    color: #ccc;
    font-size: 13px;
    padding: 6px 0;
}

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

.header-top .welcome {
    color: #aaa;
}

.header-top .contact-info {
    display: flex;
    gap: 20px;
}

.header-top .contact-info span {
    display: flex;
    align-items: center;
    gap: 5px;
}

.header-top .contact-info svg {
    width: 14px;
    height: 14px;
    fill: var(--primary-light);
}

.header-main {
    padding: 18px 0;
}

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

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

.logo-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(200, 22, 30, 0.3);
}

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

.logo-text h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--gray-dark);
    letter-spacing: 1px;
}

.logo-text p {
    font-size: 12px;
    color: var(--gray-light);
    letter-spacing: 3px;
    text-transform: uppercase;
    margin-top: 2px;
}

.header-contact {
    display: flex;
    gap: 30px;
}

.header-contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-contact-item .icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #f5f5f5, #e8e8e8);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.header-contact-item .icon svg {
    width: 20px;
    height: 20px;
    fill: var(--primary);
}

.header-contact-item .info p {
    font-size: 12px;
    color: var(--gray-light);
}

.header-contact-item .info strong {
    font-size: 18px;
    color: var(--gray-dark);
    font-weight: 700;
}

/* ===== Navigation ===== */
.nav {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    position: relative;
    z-index: 99;
}

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

.nav-list {
    display: flex;
    flex: 1;
}

.nav-list li {
    position: relative;
}

.nav-list a {
    display: block;
    color: white;
    font-size: 16px;
    font-weight: 500;
    padding: 16px 28px;
    position: relative;
    transition: var(--transition);
}

.nav-list a::before {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: white;
    transition: var(--transition);
}

.nav-list a:hover::before,
.nav-list a.active::before {
    width: 30px;
}

.nav-list a:hover,
.nav-list a.active {
    background: rgba(0, 0, 0, 0.15);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: white;
    border-radius: 2px;
    transition: var(--transition);
}

/* ===== Banner ===== */
.banner {
    position: relative;
    height: 500px;
    overflow: hidden;
    background: var(--secondary);
}

.banner-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
}

.banner-slide.active {
    opacity: 1;
}

.banner-slide::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.banner-slide-1 {
    background: linear-gradient(135deg, #0a0a1a 0%, #16213e 40%, #1a1a2e 60%, #c8161e 100%);
}

.banner-slide-1::before {
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='1200' height='500' viewBox='0 0 1200 500' preserveAspectRatio='xMidYMax'%3E%3C!-- industrial skyline silhouette --%3E%3Cpath d='M0 500 L0 350 L60 350 L60 200 L80 200 L80 350 L120 350 L120 280 L140 280 L140 350 L200 350 L200 250 L220 240 L240 250 L240 350 L300 350 L300 180 L320 180 L320 350 L400 350 L400 300 L420 290 L440 300 L440 350 L520 350 L520 220 L540 210 L560 220 L560 350 L640 350 L640 280 L660 270 L680 280 L680 350 L760 350 L760 240 L780 230 L800 240 L800 350 L880 350 L880 200 L900 190 L920 200 L920 350 L1000 350 L1000 300 L1020 290 L1040 300 L1040 350 L1200 350 L1200 500 Z' fill='rgba(255,255,255,0.04)'/%3E%3C!-- crane silhouette --%3E%3Cg transform='translate(150 80)' fill='none' stroke='rgba(255,255,255,0.06)' stroke-width='2'%3E%3Cpath d='M0 0 L0 250 M0 0 L120 0 L120 250 M0 50 L120 50 M0 100 L120 100 M0 150 L120 150 M0 200 L120 200 M-20 0 L140 0'/%3E%3Cpath d='M60 0 L60 -30 M40 -30 L80 -30 M50 -25 L70 -25' stroke-width='1.5'/%3E%3Cline x1='60' y1='-30' x2='60' y2='250' /%3E%3C/g%3E%3C!-- gear decorations --%3E%3Cg transform='translate(950 100)'%3E%3Ccircle cx='0' cy='0' r='50' fill='none' stroke='rgba(255,255,255,0.04)' stroke-width='2'/%3E%3Ccircle cx='0' cy='0' r='35' fill='none' stroke='rgba(255,255,255,0.03)' stroke-width='2'/%3E%3Ccircle cx='0' cy='0' r='15' fill='none' stroke='rgba(255,255,255,0.05)' stroke-width='2'/%3E%3C/g%3E%3C/svg%3E");
    background-size: cover;
    background-position: center bottom;
}

.banner-slide-2 {
    background: linear-gradient(135deg, #0a0a1a 0%, #1a1a2e 40%, #2b2b3e 60%, #a01015 100%);
}

.banner-slide-2::before {
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='1200' height='500' viewBox='0 0 1200 500' preserveAspectRatio='xMidYMax'%3E%3C!-- warehouse/building silhouettes --%3E%3Cpath d='M0 500 L0 380 L100 380 L100 300 L110 295 L120 300 L120 380 L200 380 L200 250 L210 245 L220 250 L220 380 L350 380 L350 320 L360 315 L370 320 L370 380 L500 380 L500 280 L510 275 L520 280 L520 380 L650 380 L650 350 L660 345 L670 350 L670 380 L800 380 L800 300 L810 295 L820 300 L820 380 L950 380 L950 260 L960 255 L970 260 L970 380 L1100 380 L1100 320 L1110 315 L1120 320 L1120 380 L1200 380 L1200 500 Z' fill='rgba(255,255,255,0.04)'/%3E%3C!-- large gear --%3E%3Cg transform='translate(200 120)'%3E%3Ccircle cx='0' cy='0' r='60' fill='none' stroke='rgba(255,255,255,0.05)' stroke-width='3'/%3E%3Ccircle cx='0' cy='0' r='40' fill='none' stroke='rgba(255,255,255,0.03)' stroke-width='2'/%3E%3Ccircle cx='0' cy='0' r='20' fill='none' stroke='rgba(255,255,255,0.04)' stroke-width='2'/%3E%3Cline x1='-60' y1='0' x2='-70' y2='0' stroke='rgba(255,255,255,0.03)' stroke-width='4'/%3E%3Cline x1='60' y1='0' x2='70' y2='0' stroke='rgba(255,255,255,0.03)' stroke-width='4'/%3E%3Cline x1='0' y1='-60' x2='0' y2='-70' stroke='rgba(255,255,255,0.03)' stroke-width='4'/%3E%3Cline x1='0' y1='60' x2='0' y2='70' stroke='rgba(255,255,255,0.03)' stroke-width='4'/%3E%3Cline x1='-42' y1='-42' x2='-49' y2='-49' stroke='rgba(255,255,255,0.02)' stroke-width='3'/%3E%3Cline x1='42' y1='42' x2='49' y2='49' stroke='rgba(255,255,255,0.02)' stroke-width='3'/%3E%3Cline x1='42' y1='-42' x2='49' y2='-49' stroke='rgba(255,255,255,0.02)' stroke-width='3'/%3E%3Cline x1='-42' y1='42' x2='-49' y2='49' stroke='rgba(255,255,255,0.02)' stroke-width='3'/%3E%3C/g%3E%3C!-- small gear --%3E%3Cg transform='translate(950 180)'%3E%3Ccircle cx='0' cy='0' r='35' fill='none' stroke='rgba(255,255,255,0.04)' stroke-width='2'/%3E%3Ccircle cx='0' cy='0' r='22' fill='none' stroke='rgba(255,255,255,0.03)' stroke-width='2'/%3E%3C/g%3E%3C/svg%3E");
    background-size: cover;
    background-position: center bottom;
}

.banner-slide-3 {
    background: linear-gradient(135deg, #1a0a0a 0%, #2b0a0d 40%, #3d0d12 60%, #c8161e 100%);
}

.banner-slide-3::before {
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='1200' height='500' viewBox='0 0 1200 500' preserveAspectRatio='xMidYMax'%3E%3C!-- factory buildings with smokestacks --%3E%3Cpath d='M0 500 L0 350 L50 350 L50 280 L55 275 L60 280 L60 350 L150 350 L150 200 L155 195 L160 200 L160 350 L280 350 L280 230 L285 225 L290 230 L290 350 L400 350 L400 300 L405 295 L410 300 L410 350 L520 350 L520 260 L525 255 L530 260 L530 350 L640 350 L640 290 L645 285 L650 290 L650 350 L760 350 L760 220 L765 215 L770 220 L770 350 L880 350 L880 310 L885 305 L890 310 L890 350 L1000 350 L1000 270 L1005 265 L1010 270 L1010 350 L1200 350 L1200 500 Z' fill='rgba(255,255,255,0.04)'/%3E%3C!-- smokestacks --%3E%3Crect x='155' y='170' width='5' height='30' fill='rgba(255,255,255,0.03)'/%3E%3Crect x='285' y='200' width='5' height='30' fill='rgba(255,255,255,0.03)'/%3E%3Crect x='525' y='230' width='5' height='30' fill='rgba(255,255,255,0.03)'/%3E%3Crect x='765' y='190' width='5' height='30' fill='rgba(255,255,255,0.03)'/%3E%3C!-- smoke puffs --%3E%3Ccircle cx='157' cy='165' r='8' fill='rgba(255,255,255,0.02)'/%3E%3Ccircle cx='150' cy='155' r='12' fill='rgba(255,255,255,0.015)'/%3E%3Ccircle cx='160' cy='145' r='15' fill='rgba(255,255,255,0.01)'/%3E%3Ccircle cx='287' cy='195' r='8' fill='rgba(255,255,255,0.02)'/%3E%3Ccircle cx='280' cy='185' r='12' fill='rgba(255,255,255,0.015)'/%3E%3C!-- safety harness icon --%3E%3Cg transform='translate(950 120)'%3E%3Cpath d='M0 -30 L-20 -10 L-20 30 L20 30 L20 -10 Z' fill='none' stroke='rgba(255,255,255,0.04)' stroke-width='2'/%3E%3Cline x1='0' y1='-30' x2='0' y2='30' stroke='rgba(255,255,255,0.03)' stroke-width='1.5'/%3E%3Cline x1='-20' y1='0' x2='20' y2='0' stroke='rgba(255,255,255,0.03)' stroke-width='1.5'/%3E%3C/g%3E%3C/svg%3E");
    background-size: cover;
    background-position: center bottom;
}

.banner-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 0 30px;
    animation: bannerFade 1.5s ease;
}

@keyframes bannerFade {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

.banner-content h2 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 15px;
    text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
    letter-spacing: 2px;
}

.banner-content p {
    font-size: 18px;
    margin-bottom: 25px;
    opacity: 0.9;
    letter-spacing: 1px;
}

.banner-content .btn {
    display: inline-block;
    padding: 12px 35px;
    background: var(--primary);
    color: white;
    border-radius: 30px;
    font-size: 15px;
    font-weight: 500;
    border: 2px solid rgba(255, 255, 255, 0.3);
    transition: var(--transition);
}

.banner-content .btn:hover {
    background: white;
    color: var(--primary);
    border-color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.banner-dots {
    position: absolute;
    bottom: 25px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
    z-index: 10;
}

.banner-dots .dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.4);
    cursor: pointer;
    transition: var(--transition);
}

.banner-dots .dot.active {
    background: var(--primary);
    width: 35px;
    border-radius: 6px;
}

.banner-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 45px;
    height: 45px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 10;
    transition: var(--transition);
    border: none;
}

.banner-arrow:hover {
    background: var(--primary);
}

.banner-arrow svg {
    width: 24px;
    height: 24px;
    fill: white;
}

.banner-arrow.prev {
    left: 30px;
}

.banner-arrow.next {
    right: 30px;
}

/* ===== Product Showcase ===== */
.products-section {
    padding: 0 0 60px;
    background: var(--white);
}

.product-categories {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 35px;
}

.category-tab {
    padding: 8px 22px;
    background: var(--bg-light);
    border-radius: 20px;
    font-size: 14px;
    color: var(--gray);
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid transparent;
}

.category-tab:hover,
.category-tab.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    box-shadow: 0 4px 12px rgba(200, 22, 30, 0.25);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.product-card {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary);
}

.product-card-img {
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.product-card-img svg {
    width: 80px;
    height: 80px;
    fill: white;
    opacity: 0.9;
    transition: var(--transition);
    z-index: 2;
}

.product-card:hover .product-card-img svg {
    transform: scale(1.1);
}

.product-card-img::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
}

.product-card-img::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='40' height='40' viewBox='0 0 40 40'%3E%3Cpath d='M20 5 L20 35 M5 20 L35 20' stroke='rgba(255,255,255,0.08)' stroke-width='1'/%3E%3C/svg%3E");
}

.product-card-body {
    padding: 15px;
    text-align: center;
}

.product-card-body h3 {
    font-size: 16px;
    color: var(--gray-dark);
    margin-bottom: 6px;
    font-weight: 600;
}

.product-card-body p {
    font-size: 13px;
    color: var(--gray-light);
    line-height: 1.5;
}

.product-card-body .price {
    margin-top: 8px;
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
}

/* Product category color variants */
.product-card[data-cat="0"] .product-card-img::before { background: linear-gradient(135deg, #1a3a5c, #2d6a9f); }
.product-card[data-cat="1"] .product-card-img::before { background: linear-gradient(135deg, #5c3a1a, #9f6a2d); }
.product-card[data-cat="2"] .product-card-img::before { background: linear-gradient(135deg, #1a5c3a, #2d9f6a); }
.product-card[data-cat="3"] .product-card-img::before { background: linear-gradient(135deg, #3a1a5c, #6a2d9f); }
.product-card[data-cat="4"] .product-card-img::before { background: linear-gradient(135deg, #5c1a3a, #9f2d6a); }
.product-card[data-cat="5"] .product-card-img::before { background: linear-gradient(135deg, #3a5c1a, #6a9f2d); }
.product-card[data-cat="6"] .product-card-img::before { background: linear-gradient(135deg, #5c5c1a, #9f9f2d); }

/* ===== Cases / Scrolling Gallery ===== */
.cases-section {
    padding: 0 0 60px;
    background: var(--bg-light);
}

.case-scroll-wrap {
    overflow: hidden;
    position: relative;
    padding: 10px 0;
}

.case-scroll-track {
    display: flex;
    gap: 20px;
    animation: scrollLeft 40s linear infinite;
    width: max-content;
}

.case-scroll-wrap:hover .case-scroll-track {
    animation-play-state: paused;
}

@keyframes scrollLeft {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

.case-card {
    flex: 0 0 280px;
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.case-card-img {
    height: 200px;
    background: linear-gradient(135deg, #e0e0e0, #c0c0c0);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.case-card-img svg {
    width: 60px;
    height: 60px;
    fill: rgba(255, 255, 255, 0.6);
}

.case-card-img .case-label {
    position: absolute;
    top: 10px;
    left: 10px;
    background: var(--primary);
    color: white;
    padding: 3px 10px;
    border-radius: 4px;
    font-size: 12px;
}

.case-card-body {
    padding: 15px;
}

.case-card-body h3 {
    font-size: 15px;
    margin-bottom: 5px;
    color: var(--gray-dark);
}

.case-card-body p {
    font-size: 13px;
    color: var(--gray-light);
}

/* ===== About Section (Home) ===== */
.about-section {
    padding: 60px 0;
    background: var(--white);
}

.about-flex {
    display: flex;
    align-items: stretch;
    gap: 50px;
}

.about-image {
    flex: 0 0 45%;
    display: flex;
}

.about-image-box {
    flex: 1;
    min-height: 350px;
    border-radius: 10px;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-hover);
}

.about-image-box::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100'%3E%3Crect width='100' height='100' fill='none' stroke='rgba(200,22,30,0.1)' stroke-width='1'/%3E%3C/svg%3E");
}

.about-image-box svg {
    width: 100px;
    height: 100px;
    fill: rgba(255, 255, 255, 0.15);
    position: absolute;
}

.about-image-box .stat-box {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
}

.about-image-box .stat-box .number {
    font-size: 56px;
    font-weight: 700;
    color: var(--primary-light);
    line-height: 1;
}

.about-image-box .stat-box .label {
    font-size: 14px;
    margin-top: 8px;
    opacity: 0.8;
}

.about-content {
    flex: 1;
}

.about-content h2 {
    font-size: 28px;
    color: var(--gray-dark);
    margin-bottom: 8px;
    font-weight: 700;
}

.about-content .subtitle {
    font-size: 14px;
    color: var(--gray-light);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 20px;
}

.about-content .desc {
    font-size: 15px;
    color: var(--gray);
    line-height: 2;
    margin-bottom: 25px;
}

.about-stats {
    display: flex;
    gap: 30px;
    margin-bottom: 30px;
}

.about-stat {
    text-align: center;
}

.about-stat .num {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.about-stat .text {
    font-size: 13px;
    color: var(--gray-light);
    margin-top: 5px;
}

.btn-main {
    display: inline-block;
    padding: 12px 30px;
    background: var(--primary);
    color: white;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn-main:hover {
    background: var(--primary-dark);
    color: white;
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(200, 22, 30, 0.3);
}

/* ===== Advantages ===== */
.advantages-section {
    padding: 60px 0;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    position: relative;
}

.advantages-section::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60'%3E%3Crect width='60' height='60' fill='none' stroke='rgba(255,255,255,0.02)' stroke-width='1'/%3E%3C/svg%3E");
}

.advantages-section .section-title h2 {
    color: white;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    position: relative;
    z-index: 2;
}

.advantage-card {
    text-align: center;
    padding: 35px 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 10px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.advantage-card:hover {
    background: rgba(200, 22, 30, 0.15);
    border-color: var(--primary);
    transform: translateY(-5px);
}

.advantage-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(200, 22, 30, 0.3);
}

.advantage-icon svg {
    width: 35px;
    height: 35px;
    fill: white;
}

.advantage-card h3 {
    color: white;
    font-size: 20px;
    margin-bottom: 12px;
    font-weight: 600;
}

.advantage-card p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
    line-height: 1.8;
}

/* ===== News Section ===== */
.news-section {
    padding: 0 0 60px;
    background: var(--white);
}

.news-flex {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: start;
}

.news-featured {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.news-featured:hover {
    box-shadow: var(--shadow-hover);
}

.news-featured-img {
    height: 250px;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.news-featured-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    position: absolute;
    top: 0;
    left: 0;
}

.news-featured-img svg {
    width: 80px;
    height: 80px;
    fill: rgba(255, 255, 255, 0.3);
}

.news-featured-body {
    padding: 20px;
    background: var(--white);
}

.news-featured-body .date {
    font-size: 13px;
    color: var(--primary);
    margin-bottom: 8px;
    font-weight: 600;
}

.news-featured-body h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--gray-dark);
    line-height: 1.5;
}

.news-featured-body p {
    font-size: 14px;
    color: var(--gray);
    line-height: 1.8;
}

.news-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.news-item {
    display: flex;
    gap: 20px;
    padding: 20px;
    background: var(--bg-light);
    border-radius: 8px;
    transition: var(--transition);
    cursor: pointer;
    border-left: 4px solid transparent;
}

.news-item:hover {
    background: var(--white);
    box-shadow: var(--shadow);
    border-left-color: var(--primary);
    transform: translateX(5px);
}

.news-date-box {
    flex: 0 0 70px;
    text-align: center;
    border-right: 1px solid var(--border);
    padding-right: 15px;
}

.news-date-box .day {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

.news-date-box .month {
    font-size: 12px;
    color: var(--gray-light);
    margin-top: 3px;
}

.news-item-content h3 {
    font-size: 16px;
    color: var(--gray-dark);
    margin-bottom: 6px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-item-content p {
    font-size: 13px;
    color: var(--gray-light);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ===== Friendly Links ===== */
.links-section {
    padding: 25px 0;
    background: var(--bg-light);
    border-top: 1px solid var(--border);
}

.links-section .container {
    display: flex;
    align-items: center;
    gap: 20px;
    flex-wrap: wrap;
}

.links-section .links-title {
    font-weight: 600;
    color: var(--gray-dark);
    font-size: 15px;
}

.links-section a {
    font-size: 13px;
    color: var(--gray);
    padding: 3px 0;
}

.links-section a:hover {
    color: var(--primary);
}

/* ===== Footer ===== */
.footer {
    background: var(--secondary);
    color: #aaa;
}

.footer-main {
    padding: 50px 0 30px;
}

.footer-main .container {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
}

.footer-info h3 {
    color: white;
    font-size: 20px;
    margin-bottom: 15px;
}

.footer-info .footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

.footer-info .footer-logo .logo-icon {
    width: 40px;
    height: 40px;
}

.footer-info .footer-logo .logo-icon svg {
    width: 26px;
    height: 26px;
}

.footer-info .footer-logo h3 {
    font-size: 18px;
    margin: 0;
}

.footer-info p {
    font-size: 14px;
    line-height: 2;
    color: #999;
}

.footer-contact li {
    font-size: 14px;
    padding: 5px 0;
    display: flex;
    align-items: flex-start;
    gap: 8px;
}

.footer-contact svg {
    width: 16px;
    height: 16px;
    fill: var(--primary-light);
    flex-shrink: 0;
    margin-top: 3px;
}

.footer h4 {
    color: white;
    font-size: 16px;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer h4::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 30px;
    height: 2px;
    background: var(--primary);
}

.footer-nav li {
    padding: 5px 0;
}

.footer-nav a {
    font-size: 14px;
    color: #999;
}

.footer-nav a:hover {
    color: var(--primary-light);
    padding-left: 5px;
}

.footer-qrcode {
    text-align: center;
}

.qrcode-placeholder {
    width: 120px;
    height: 120px;
    background: white;
    border-radius: 8px;
    margin: 0 auto 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.qrcode-placeholder svg {
    width: 100px;
    height: 100px;
    fill: var(--secondary);
}

.footer-qrcode p {
    font-size: 13px;
    color: #999;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 15px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 13px;
    color: #666;
}

.footer-bottom a {
    color: #888;
}

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

/* ===== Floating Sidebar ===== */
.float-sidebar {
    position: fixed;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.float-btn {
    width: 50px;
    height: 50px;
    border-radius: 8px;
    background: var(--white);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    border: none;
}

.float-btn:hover {
    background: var(--primary);
    transform: translateX(-5px);
}

.float-btn:hover svg {
    fill: white;
}

.float-btn svg {
    width: 24px;
    height: 24px;
    fill: var(--primary);
    transition: var(--transition);
}

.float-btn .tooltip {
    position: absolute;
    right: 60px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--secondary);
    color: white;
    padding: 8px 15px;
    border-radius: 6px;
    font-size: 13px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    pointer-events: none;
}

.float-btn .tooltip::after {
    content: "";
    position: absolute;
    right: -6px;
    top: 50%;
    transform: translateY(-50%);
    border: 6px solid transparent;
    border-left-color: var(--secondary);
}

.float-btn:hover .tooltip {
    opacity: 1;
    visibility: visible;
}

.float-btn.top {
    opacity: 0;
    visibility: hidden;
}

.float-btn.top.visible {
    opacity: 1;
    visibility: visible;
}

/* ===== Page Banner ===== */
.page-banner {
    height: 280px;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 60%, #c8161e 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
}

.page-banner::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='80' viewBox='0 0 80 80'%3E%3Cpath d='M40 10 L70 40 L40 70 L10 40 Z' fill='none' stroke='rgba(255,255,255,0.03)' stroke-width='1'/%3E%3C/svg%3E");
}

.page-banner h1 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 10px;
    position: relative;
    z-index: 2;
    letter-spacing: 2px;
}

.page-banner p {
    font-size: 15px;
    opacity: 0.8;
    position: relative;
    z-index: 2;
    letter-spacing: 1px;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
    background: var(--bg-light);
    padding: 12px 0;
    font-size: 14px;
}

.breadcrumb .container {
    display: flex;
    gap: 8px;
    align-items: center;
}

.breadcrumb a {
    color: var(--gray);
}

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

.breadcrumb .separator {
    color: var(--gray-light);
}

.breadcrumb .current {
    color: var(--gray-dark);
}

/* ===== Page Content Area ===== */
.page-content {
    padding: 50px 0;
    min-height: 500px;
}

/* ===== About Page ===== */
.about-page-content {
    padding: 50px 0;
}

.about-hero {
    display: flex;
    gap: 50px;
    align-items: center;
    margin-bottom: 60px;
}

.about-hero-text h2 {
    font-size: 28px;
    color: var(--gray-dark);
    margin-bottom: 15px;
}

.about-hero-text .subtitle {
    color: var(--primary);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 20px;
}

.about-hero-text p {
    color: var(--gray);
    line-height: 2;
    margin-bottom: 15px;
    font-size: 15px;
}

.about-hero-image {
    flex: 0 0 40%;
    height: 300px;
    background: linear-gradient(135deg, #1a1a2e, #c8161e);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-hover);
}

.about-hero-image svg {
    width: 100px;
    height: 100px;
    fill: rgba(255, 255, 255, 0.2);
}

.about-culture {
    background: var(--bg-light);
    padding: 50px 0;
    margin: 0 -9999px;
    padding-left: 9999px;
    padding-right: 9999px;
}

.culture-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 30px;
}

.culture-card {
    background: var(--white);
    padding: 35px 25px;
    border-radius: 10px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-top: 4px solid var(--primary);
}

.culture-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
}

.culture-card .icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.culture-card .icon svg {
    width: 30px;
    height: 30px;
    fill: white;
}

.culture-card h3 {
    font-size: 20px;
    margin-bottom: 12px;
    color: var(--gray-dark);
}

.culture-card p {
    color: var(--gray);
    font-size: 14px;
    line-height: 1.8;
}

/* ===== Products Page ===== */
.products-page {
    padding: 50px 0;
}

.products-page-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

/* ===== News Page ===== */
.news-page {
    padding: 50px 0;
}

.news-page-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.news-page-item {
    display: flex;
    gap: 25px;
    padding: 25px;
    background: var(--white);
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
    border: 1px solid var(--border);
}

.news-page-item:hover {
    box-shadow: var(--shadow-hover);
    border-color: var(--primary);
    transform: translateX(5px);
}

.news-page-item-img {
    flex: 0 0 200px;
    height: 140px;
    border-radius: 8px;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.news-page-item-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
}

.news-page-item-img svg {
    width: 50px;
    height: 50px;
    fill: rgba(255, 255, 255, 0.3);
}

.news-page-item-body {
    flex: 1;
}

.news-page-item-body .date {
    font-size: 13px;
    color: var(--primary);
    margin-bottom: 8px;
}

.news-page-item-body h3 {
    font-size: 18px;
    color: var(--gray-dark);
    margin-bottom: 10px;
    line-height: 1.5;
}

.news-page-item-body p {
    color: var(--gray);
    font-size: 14px;
    line-height: 1.8;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 40px;
}

.pagination a {
    padding: 8px 14px;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    color: var(--gray-dark);
    transition: var(--transition);
}

.pagination a:hover,
.pagination a.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* news-page-item-content = news-page-item-body 的别名 */
.news-page-item-content {
    padding: 20px;
}

.news-page-item-content .meta {
    font-size: 13px;
    color: var(--gray-light);
    margin-bottom: 8px;
}

.news-page-item-content h3 {
    font-size: 17px;
    color: var(--gray-dark);
    margin-bottom: 8px;
    transition: var(--transition);
}

.news-page-item-content h3:hover {
    color: var(--primary);
}

.news-page-item-content p {
    font-size: 14px;
    color: var(--gray);
    line-height: 1.8;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 10px;
    transition: -webkit-line-clamp 0.3s ease;
}

.news-page-item-content p.expanded {
    -webkit-line-clamp: unset;
    display: block;
}

.read-more {
    display: inline-block;
    font-size: 13px;
    color: var(--primary);
    font-weight: 500;
    transition: var(--transition);
}

.read-more:hover {
    color: var(--primary-dark);
    transform: translateX(5px);
}

/* ===== Cases Page ===== */
.cases-page {
    padding: 50px 0;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
}

.case-page-card {
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    background: var(--white);
    border: 1px solid var(--border);
}

.case-page-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary);
}

.case-page-card-img {
    height: 220px;
    background: linear-gradient(135deg, #e8e8e8, #c0c0c0);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.case-page-card-img svg {
    width: 60px;
    height: 60px;
    fill: rgba(255, 255, 255, 0.6);
}

.case-page-card-img .placeholder-text {
    position: absolute;
    bottom: 10px;
    left: 10px;
    background: rgba(0, 0, 0, 0.5);
    color: white;
    padding: 3px 10px;
    border-radius: 4px;
    font-size: 12px;
}

.case-page-card-body {
    padding: 20px;
}

.case-page-card-body h3 {
    font-size: 17px;
    color: var(--gray-dark);
    margin-bottom: 8px;
}

.case-page-card-body p {
    font-size: 14px;
    color: var(--gray);
    line-height: 1.7;
}

/* ===== Contact Page ===== */
.contact-page {
    padding: 50px 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 50px;
}

.contact-info-card {
    background: var(--white);
    padding: 35px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.contact-info-card h2 {
    font-size: 24px;
    color: var(--gray-dark);
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 15px;
}

.contact-info-card h2::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}

.contact-info-list li {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    padding: 15px 0;
    border-bottom: 1px solid var(--border);
}

.contact-info-list li:last-child {
    border-bottom: none;
}

.contact-info-list .icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-info-list .icon svg {
    width: 20px;
    height: 20px;
    fill: white;
}

.contact-info-list .text p {
    font-size: 13px;
    color: var(--gray-light);
    margin-bottom: 3px;
}

.contact-info-list .text strong {
    font-size: 16px;
    color: var(--gray-dark);
    font-weight: 600;
}

.contact-form-card {
    background: var(--white);
    padding: 35px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.contact-form-card h2 {
    font-size: 24px;
    color: var(--gray-dark);
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 15px;
}

.contact-form-card h2::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    color: var(--gray-dark);
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
    transition: var(--transition);
    background: var(--bg-light);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    background: var(--white);
    box-shadow: 0 0 0 3px rgba(200, 22, 30, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.map-section {
    margin-top: 30px;
}

.map-placeholder {
    height: 350px;
    background: linear-gradient(135deg, #e8e8e8, #d0d0d0);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 10px;
    box-shadow: var(--shadow);
}

.map-placeholder svg {
    width: 60px;
    height: 60px;
    fill: var(--gray-light);
}

.map-placeholder p {
    color: var(--gray);
    font-size: 16px;
}

/* ===== Contact Page Extra Styles ===== */
.contact-info-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
}

.contact-info-row:last-child {
    border-bottom: none;
}

.contact-info-card {
    background: var(--white);
    padding: 30px 20px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.contact-info-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.contact-info-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin: 0 auto 20px;
}

.contact-info-icon svg {
    width: 28px;
    height: 28px;
    fill: white;
}

.contact-info-card h3 {
    font-size: 18px;
    color: var(--gray-dark);
    margin-bottom: 10px;
}

.contact-info-card p {
    font-size: 14px;
    color: var(--gray);
    line-height: 1.8;
}

.contact-form-map {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 50px;
}

.contact-form-box {
    background: var(--white);
    padding: 35px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.contact-form-box h2 {
    font-size: 24px;
    color: var(--gray-dark);
    margin-bottom: 8px;
    position: relative;
    padding-bottom: 15px;
}

.contact-form-box h2::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}

.form-subtitle {
    font-size: 14px;
    color: var(--gray);
    margin-bottom: 25px;
}

.contact-map-box {
    background: var(--white);
    padding: 35px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.contact-map-box h2 {
    font-size: 24px;
    color: var(--gray-dark);
    margin-bottom: 8px;
    position: relative;
    padding-bottom: 15px;
}

.contact-map-box h2::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--primary);
    border-radius: 2px;
}

.contact-map-box .map-placeholder {
    margin-top: 20px;
}

.map-hint {
    font-size: 13px;
    color: var(--gray-light);
    margin-top: 10px;
    text-align: center;
}

.btn-submit {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-family: inherit;
}

.btn-submit:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    box-shadow: 0 4px 15px rgba(200, 22, 30, 0.3);
    transform: translateY(-2px);
}

.contact-extra {
    background: linear-gradient(135deg, #2b2b2b, #1a1a1a);
    padding: 40px 0;
    text-align: center;
    color: white;
}

.contact-extra h2 {
    font-size: 26px;
    margin-bottom: 15px;
}

.contact-extra p {
    font-size: 16px;
    color: #ccc;
    margin-bottom: 20px;
}

.contact-extra .btn-primary {
    display: inline-block;
}

.header-contact {
    display: flex;
    align-items: center;
    gap: 30px;
}

.header-contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.header-contact-item .icon {
    width: 36px;
    height: 36px;
    background: var(--bg-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.header-contact-item .icon svg {
    width: 18px;
    height: 18px;
    fill: var(--primary);
}

.header-contact-item .info p {
    font-size: 12px;
    color: var(--gray-light);
}

.header-contact-item .info strong {
    font-size: 16px;
    color: var(--gray-dark);
}

/* ===== Animations ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.8s ease forwards;
}

/* ===== SPA Page Routing ===== */
.page {
    display: none;
    min-height: 400px;
}

.page.page-active {
    display: block;
}

#app {
    min-height: 500px;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .product-grid {
        grid-template-columns: repeat(3, 1fr);
    }

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

    .footer-main .container {
        grid-template-columns: 1fr 1fr;
    }

    .news-flex {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .header-top {
        display: none;
    }

    .header-main .container {
        flex-direction: column;
        gap: 15px;
    }

    .header-contact {
        gap: 15px;
    }

    .header-contact-item .info strong {
        font-size: 14px;
    }

    .nav .container {
        position: relative;
    }

    .nav-toggle {
        display: flex;
        position: absolute;
        right: 15px;
        top: 12px;
        z-index: 10;
    }

    .nav-list {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--primary);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
    }

    .nav-list.active {
        display: flex;
        z-index: 9999;
    }

    .nav-list a {
        padding: 14px 25px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    .banner {
        height: 350px;
    }

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

    .banner-content p {
        font-size: 14px;
    }

    .banner-arrow {
        width: 35px;
        height: 35px;
    }

    .banner-arrow svg {
        width: 18px;
        height: 18px;
    }

    .section-title h2 {
        font-size: 24px;
    }

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

    .about-flex {
        flex-direction: column;
        gap: 30px;
    }

    .about-image,
    .about-content {
        flex: 1;
        width: 100%;
    }

    .about-image-box {
        height: 250px;
    }

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

    .footer-main .container {
        grid-template-columns: 1fr;
        gap: 30px;
    }

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

    .contact-info-row {
        grid-template-columns: repeat(2, 1fr);
    }

    .contact-form-map {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

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

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

    .about-hero {
        flex-direction: column;
    }

    .about-hero-image {
        flex: 1;
        width: 100%;
        height: 200px;
    }

    .float-sidebar {
        right: 8px;
    }

    .float-btn {
        width: 42px;
        height: 42px;
    }

    .float-btn svg {
        width: 20px;
        height: 20px;
    }

    .page-banner h1 {
        font-size: 26px;
    }

    .news-page-item {
        flex-direction: column;
    }

    .news-page-item-img {
        flex: 1;
        width: 100%;
        height: 160px;
    }
}

@media (max-width: 480px) {
    .product-grid,
    .products-page-grid,
    .cases-grid {
        grid-template-columns: 1fr;
    }

    .banner-content h2 {
        font-size: 20px;
    }

    .banner-dots .dot {
        width: 8px;
        height: 8px;
    }

    .banner-dots .dot.active {
        width: 20px;
    }

    .about-stats {
        flex-wrap: wrap;
        gap: 15px;
    }

    .contact-info-row {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   新增：在线咨询弹窗 + 微信二维码 + 表单成功
   ============================================ */

/* ===== 微信二维码图片 ===== */
.wechat-qr-img {
    width: 120px;
    height: 120px;
    border-radius: 8px;
    margin: 0 auto 10px;
    display: block;
    background: white;
    padding: 5px;
}

.footer-qrcode p {
    font-size: 13px;
    color: #999;
}

/* ===== 在线咨询弹窗 ===== */
.popup-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.popup-overlay.active {
    opacity: 1;
    visibility: visible;
}

.popup-box {
    background: white;
    border-radius: 12px;
    padding: 35px 30px;
    max-width: 380px;
    width: 90%;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    transform: translateY(-20px);
    transition: all 0.3s ease;
    position: relative;
}

.popup-overlay.active .popup-box {
    transform: translateY(0);
}

.popup-close {
    position: absolute;
    top: 12px;
    right: 15px;
    width: 30px;
    height: 30px;
    border: none;
    background: #f5f5f5;
    border-radius: 50%;
    font-size: 18px;
    color: #999;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    line-height: 1;
}

.popup-close:hover {
    background: var(--primary);
    color: white;
}

.popup-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--gray-dark);
    margin-bottom: 8px;
}

.popup-subtitle {
    font-size: 14px;
    color: var(--gray);
    margin-bottom: 20px;
}

.popup-qr {
    width: 200px;
    height: 200px;
    margin: 0 auto 15px;
    border-radius: 10px;
    overflow: hidden;
    border: 2px solid var(--border);
}

.popup-qr img {
    width: 100%;
    height: 100%;
    display: block;
}

.popup-qr-hint {
    font-size: 14px;
    color: var(--gray);
    margin-bottom: 20px;
}

.popup-actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.popup-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 20px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    text-decoration: none;
}

.popup-btn svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

.popup-btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
}

.popup-btn-primary:hover {
    box-shadow: 0 4px 15px rgba(200, 22, 30, 0.3);
    transform: translateY(-2px);
}

.popup-btn-outline {
    background: white;
    color: var(--gray-dark);
    border: 1px solid var(--border);
}

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

/* ===== 联系页微信二维码卡片 ===== */
.contact-qr-card {
    background: var(--white);
    padding: 30px 20px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: var(--transition);
}

.contact-qr-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.contact-qr-card .qr-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, #07c160, #06ad56);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.contact-qr-card .qr-icon svg {
    width: 32px;
    height: 32px;
    fill: white;
}

.contact-qr-card h3 {
    font-size: 18px;
    color: var(--gray-dark);
    margin-bottom: 10px;
}

.contact-qr-card .qr-img {
    width: 140px;
    height: 140px;
    margin: 0 auto 10px;
    border-radius: 8px;
    border: 1px solid var(--border);
}

.contact-qr-card .qr-img img {
    width: 100%;
    height: 100%;
    display: block;
    border-radius: 8px;
}

.contact-qr-card p {
    font-size: 13px;
    color: var(--gray);
    line-height: 1.8;
}

/* ===== 表单成功弹窗 ===== */
.form-success-box {
    text-align: center;
}

.success-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #07c160, #06ad56);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.success-icon svg {
    width: 40px;
    height: 40px;
    fill: white;
}

.form-success-box h3 {
    font-size: 22px;
    color: var(--gray-dark);
    margin-bottom: 10px;
}

.form-success-box p {
    font-size: 14px;
    color: var(--gray);
    margin-bottom: 20px;
    line-height: 1.8;
}

.form-success-box .popup-qr {
    width: 180px;
    height: 180px;
}

/* ===== 移动端适配 ===== */
@media (max-width: 768px) {
    .popup-box {
        padding: 25px 20px;
        max-width: 320px;
    }

    .popup-qr {
        width: 170px;
        height: 170px;
    }

    .form-success-box .popup-qr {
        width: 160px;
        height: 160px;
    }
}

/* ============================================
   新增：搜索框 + 语言切换 + 产品图片 + 展示区
   ============================================ */

/* ===== 搜索框 + 语言切换 ===== */
.nav-right {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-left: auto;
}

.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-box .search-icon {
    width: 18px;
    height: 18px;
    fill: rgba(255, 255, 255, 0.7);
    position: absolute;
    left: 10px;
    pointer-events: none;
}

.search-box input {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 20px;
    padding: 7px 15px 7px 35px;
    color: white;
    font-size: 13px;
    width: 160px;
    transition: all 0.3s ease;
    outline: none;
}

.search-box input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.search-box input:focus {
    background: rgba(255, 255, 255, 0.25);
    border-color: rgba(255, 255, 255, 0.5);
    width: 200px;
}

.lang-toggle {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 4px;
    color: white;
    padding: 6px 12px;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 0.5px;
}

.lang-toggle:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* ===== 产品卡片图片 ===== */
.product-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
    position: relative;
    z-index: 3;
}

.product-card:hover .product-card-img img {
    transform: scale(1.08);
}

/* 所有产品卡片图片容器去掉渐变背景（已全部替换为实物图） */
.product-card-img::before,
.product-card-img::after {
    display: none !important;
}

/* ===== 案例图片 ===== */
.case-card-img img,
.case-page-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
    position: relative;
    z-index: 2;
}

.case-card:hover .case-card-img img,
.case-page-card:hover .case-page-card-img img {
    transform: scale(1.08);
}

/* 有图片时去掉渐变背景 */
.case-card-img:has(img),
.case-page-card-img:has(img) {
    background: transparent;
}

/* 案例卡片图片在上方 */
.case-card-img img,
.case-page-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
    position: relative;
    z-index: 2;
}

.case-card:hover .case-card-img img,
.case-page-card:hover .case-page-card-img img {
    transform: scale(1.08);
}

/* 案例卡片去掉渐变背景 */
.case-card-img,
.case-page-card-img {
    background: transparent !important;
}

/* ===== 关于我们图片 ===== */
.about-image-box img,
.about-hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 10px;
}

/* ===== 公司风采展示 ===== */
.showcase-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 25px;
    margin-top: 30px;
}

.showcase-item {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    aspect-ratio: 4/3;
    cursor: pointer;
}

.showcase-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.showcase-item:hover img {
    transform: scale(1.1);
}

.showcase-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8), transparent);
    padding: 20px;
    color: white;
}

.showcase-overlay h3 {
    font-size: 18px;
    margin-bottom: 5px;
}

.showcase-overlay p {
    font-size: 13px;
    opacity: 0.9;
}

/* ===== 搜索无结果提示 ===== */
.search-no-result {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    color: var(--gray);
    font-size: 16px;
}

.search-no-result svg {
    width: 64px;
    height: 64px;
    fill: var(--gray-light);
    margin-bottom: 15px;
}

/* ===== 移动端适配 ===== */
@media (max-width: 768px) {
    .nav-right {
        display: none;
    }

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

    .search-box input {
        width: 120px;
    }

    .search-box input:focus {
        width: 140px;
    }
}

@media (max-width: 1024px) {
    .showcase-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ============================================
   V5优化：全站细节修复
   ============================================ */

/* ===== 关于我们左侧图减暗遮罩 ===== */
.about-image-box img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 10px;
}

.about-image-box::before {
    background: linear-gradient(135deg, rgba(26,26,46,0.4), rgba(200,22,30,0.3));
}

/* ===== 联系页卡片等高 ===== */
.contact-info-card,
.contact-qr-card {
    min-height: 220px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* ===== 英文副标题放大 ===== */
.section-title p,
.about-content .subtitle,
.about-hero-text .subtitle {
    font-size: 16px;
    color: var(--gray);
    opacity: 0.7;
}

/* ===== 顶部通知栏间距优化 ===== */
.header-top .contact-info {
    gap: 25px;
}

.header-top .contact-info span {
    gap: 6px;
}

/* ===== 新闻特色图替换SVG ===== */
.news-featured-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-featured-img:has(img) svg {
    display: none;
}

/* 兼容性fallback：直接隐藏新闻特色图SVG */
.news-featured-img svg {
    display: none;
}

/* ===== 悬浮栏PC端改右下角 ===== */
@media (min-width: 769px) {
    .float-sidebar {
        top: auto;
        bottom: 30px;
        right: 20px;
        transform: none;
        flex-direction: column;
    }
}

/* ===== 地图容器 ===== */
.map-container iframe {
    display: block;
}

/* ===== 新闻列表图片 ===== */
.news-page-item-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 8px;
}

.news-page-item-img svg {
    display: none;
}

/* ===== 按钮hover增强 ===== */
.btn-submit:active {
    transform: translateY(0);
}

.btn-main:active {
    transform: translateY(0);
}

/* ===== 公司风采统一比例（已在上面定义aspect-ratio） ===== */
.showcase-item {
    aspect-ratio: 4/3;
}

/* ===== 页脚底部文字提亮 ===== */
.footer-bottom p,
.footer-bottom a {
    color: #888;
    font-size: 13px;
}

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

/* ===== 移动端搜索框显示 ===== */
@media (max-width: 768px) {
    .nav-right {
        display: flex;
        position: absolute;
        right: 50px;
        top: 12px;
        gap: 8px;
    }

    .search-box input {
        width: 100px;
        font-size: 12px;
        padding: 5px 10px 5px 28px;
    }

    .search-box input:focus {
        width: 120px;
    }

    .search-box .search-icon {
        width: 14px;
        height: 14px;
        left: 7px;
    }

    .lang-toggle {
        padding: 4px 8px;
        font-size: 11px;
    }
}

/* ===== V5.1: 产品卡片等高 + Banner副标题 ===== */
.product-card-body {
    min-height: 90px;
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
}

.product-card-body p {
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    display: -webkit-box;
}

/* Banner副标题放大 */
.banner-content p {
    font-size: 16px;
    opacity: 0.85;
}

/* 新闻特色图区域 */
.news-featured {
    min-height: 300px;
}

.news-featured-img {
    height: 100%;
    min-height: 300px;
}

/* 新闻列表日期数字对齐 */
.news-date-box {
    min-width: 60px;
    text-align: center;
}

/* ===== About Page - extracted inline styles ===== */
.about-stats {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 20px;
    padding: 40px 0;
    background: var(--bg-light);
    border-radius: 10px;
    margin: 40px 0;
}

.about-stat {
    text-align: center;
}

.about-showcase {
    padding: 50px 0;
    background: var(--white);
}

.about-culture {
    background: var(--bg-light);
    padding: 50px 0;
}

.about-honors {
    padding: 50px 0;
}

.culture-card-accent {
    border-top-color: var(--primary);
}

/* ===== Contact page - extracted inline styles ===== */
.contact-map-container {
    width: 100%;
    height: 400px;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.contact-map-container iframe {
    width: 100%;
    height: 400px;
    border: 0;
}

.contact-info-title {
    margin-top: 20px;
}

/* tel/mailto links inherit parent color */
.header-contact-item,
.footer-info a[href^="tel:"],
.footer-info a[href^="mailto:"],
.contact-info-list a[href^="tel:"],
.contact-info-list a[href^="mailto:"] {
    text-decoration: none;
    color: inherit;
}

.header-contact-item {
    cursor: pointer;
}

/* Product categories on products page */
.products-page-grid .product-categories {
    margin-bottom: 40px;
}

/* ===== Image loading skeleton ===== */
.product-card-img,
.case-page-card-img,
.news-page-item-img,
.showcase-item {
    background-color: #f0f0f0;
    background-image: linear-gradient(90deg, #f0f0f0 0%, #e8e8e8 50%, #f0f0f0 100%);
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s infinite ease-in-out;
}

.product-card-img img,
.case-page-card-img img,
.news-page-item-img img,
.showcase-item img {
    position: relative;
    z-index: 1;
}

.product-card-img img[src],
.case-page-card-img img[src],
.news-page-item-img img[src],
.showcase-item img[src] {
    background: transparent;
}

@keyframes skeleton-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ===== Schema.org SEO styles ===== */
.schema-info {
    display: none;
}