/* ============================================
   杭州窗霸智能家居有限公司 - 企业官网样式
   Design System
   ============================================ */

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

:root {
    /* Colors */
    --primary: #0a2540;
    --primary-light: #1a3a5c;
    --primary-dark: #061a30;
    --accent: #c8a55b;
    --accent-light: #d4b876;
    --accent-dark: #b08e3e;
    --teal: #2d7d7d;
    --teal-light: #3a9999;
    --bg-light: #f8f9fa;
    --bg-gray: #eef1f4;
    --bg-dark: #1a1f2e;
    --text-dark: #2c3e50;
    --text-body: #555;
    --text-light: #8898aa;
    --text-muted: #b0b8c5;
    --white: #ffffff;
    --border: #e0e5ec;
    --shadow-sm: 0 2px 8px rgba(10, 37, 64, 0.06);
    --shadow-md: 0 4px 20px rgba(10, 37, 64, 0.1);
    --shadow-lg: 0 8px 40px rgba(10, 37, 64, 0.15);
    --shadow-xl: 0 20px 60px rgba(10, 37, 64, 0.2);
    --transition: 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Layout */
    --header-h: 80px;
    --max-w: 1280px;
    --gutter: 24px;
}

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

body {
    font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text-body);
    background: var(--white);
    line-height: 1.7;
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-dark);
    font-weight: 700;
    line-height: 1.3;
}

h1 { font-size: clamp(2rem, 5vw, 3.2rem); }
h2 { font-size: clamp(1.6rem, 3.5vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 2.5vw, 1.6rem); }
h4 { font-size: 1.15rem; }

.section-title {
    text-align: center;
    margin-bottom: 12px;
    position: relative;
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    font-size: 1rem;
    margin-bottom: 50px;
    letter-spacing: 1px;
}

.section-eng {
    display: block;
    font-size: 0.8rem;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 8px;
    font-weight: 500;
}

.section-line {
    width: 50px;
    height: 3px;
    background: var(--accent);
    margin: 16px auto 0;
    border-radius: 2px;
}

/* === Layout === */
.container {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 var(--gutter);
}

.section {
    padding: 90px 0;
}

.section-gray {
    background: var(--bg-light);
}

.section-dark {
    background: var(--primary);
    color: rgba(255, 255, 255, 0.85);
}

.section-dark h2,
.section-dark h3,
.section-dark h4 {
    color: var(--white);
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 36px;
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
    border: 2px solid transparent;
    letter-spacing: 1px;
}

.btn-primary {
    background: var(--accent);
    color: var(--white);
    border-color: var(--accent);
}

.btn-primary:hover {
    background: var(--accent-dark);
    border-color: var(--accent-dark);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(200, 165, 91, 0.35);
}

.btn-outline {
    background: transparent;
    color: var(--white);
    border-color: rgba(255, 255, 255, 0.5);
}

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

.btn-dark {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

.btn-dark:hover {
    background: var(--primary-light);
    border-color: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-text {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--accent);
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0;
    border: none;
    background: none;
}

.btn-text::after {
    content: "\2192";
    transition: transform var(--transition);
}

.btn-text:hover {
    color: var(--accent-dark);
}

.btn-text:hover::after {
    transform: translateX(4px);
}

/* === Header / Navigation === */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-h);
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}

.header.scrolled {
    height: 64px;
    box-shadow: var(--shadow-md);
}

.header-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 var(--gutter);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    flex-shrink: 0;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--teal));
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-size: 1.3rem;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-text .cn {
    font-size: 1.1rem;
    font-weight: 700;
}

.logo-text .en {
    font-size: 0.6rem;
    color: var(--text-light);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.nav {
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 18px;
    font-size: 0.95rem;
    color: var(--text-dark);
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--accent);
}

.nav-link.active::after {
    content: "";
    position: absolute;
    bottom: -4px;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 2px;
    background: var(--accent);
    border-radius: 1px;
}

.header-tel {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: var(--primary);
    color: var(--white);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
}

.header-tel svg {
    width: 16px;
    height: 16px;
}

/* Mobile menu toggle */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--primary);
    transition: all var(--transition);
    border-radius: 2px;
}

.menu-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

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

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

/* === Hero Section === */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    padding-top: var(--header-h);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #0a2540 0%, #0d3556 40%, #134e6f 100%);
    z-index: 0;
}

.hero-bg::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(45, 125, 125, 0.25) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(200, 165, 91, 0.15) 0%, transparent 50%);
}

.hero-bg::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
}

.hero-content {
    position: relative;
    z-index: 2;
    color: var(--white);
    max-width: 700px;
    padding: 60px 0;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 18px;
    background: rgba(200, 165, 91, 0.15);
    border: 1px solid rgba(200, 165, 91, 0.4);
    border-radius: 50px;
    color: var(--accent-light);
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 24px;
    backdrop-filter: blur(5px);
}

.hero-tag .dot {
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.3); }
}

.hero h1 {
    color: var(--white);
    font-size: clamp(2.2rem, 5vw, 3.6rem);
    font-weight: 800;
    margin-bottom: 24px;
    line-height: 1.25;
}

.hero h1 .highlight {
    color: var(--accent);
    position: relative;
    display: inline-block;
}

.hero-desc {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.75);
    margin-bottom: 40px;
    line-height: 1.8;
    max-width: 580px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    gap: 50px;
    margin-top: 60px;
    padding-top: 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.hero-stat {
    text-align: left;
}

.hero-stat .num {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--white);
    line-height: 1;
}

.hero-stat .num .unit {
    font-size: 1.2rem;
    color: var(--accent);
}

.hero-stat .label {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 6px;
}

.hero-scroll {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.8rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

.hero-scroll .mouse {
    width: 22px;
    height: 36px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-radius: 12px;
    position: relative;
}

.hero-scroll .mouse::after {
    content: "";
    position: absolute;
    top: 6px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: rgba(255, 255, 255, 0.6);
    border-radius: 2px;
    animation: scroll-wheel 1.8s ease-in-out infinite;
}

@keyframes scroll-wheel {
    0% { opacity: 1; top: 6px; }
    100% { opacity: 0; top: 20px; }
}

/* === Page Banner (sub-pages) === */
.page-banner {
    position: relative;
    min-height: 380px;
    display: flex;
    align-items: center;
    padding-top: var(--header-h);
    overflow: hidden;
}

.page-banner-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #0a2540 0%, #134e6f 100%);
    z-index: 0;
}

.page-banner-bg::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 70% 50%, rgba(45, 125, 125, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 30% 30%, rgba(200, 165, 91, 0.12) 0%, transparent 50%);
}

.page-banner-bg::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
}

.page-banner-content {
    position: relative;
    z-index: 2;
    color: var(--white);
}

.page-banner h1 {
    color: var(--white);
    margin-bottom: 12px;
}

.page-banner .breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.6);
}

.page-banner .breadcrumb a:hover {
    color: var(--accent);
}

.page-banner .breadcrumb .sep {
    color: rgba(255, 255, 255, 0.3);
}

/* === About Brief (Home) === */
.about-brief {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-brief-text .section-eng,
.about-brief-text .section-title {
    text-align: left;
}

.about-brief-text .section-line {
    margin-left: 0;
}

.about-brief-text p {
    margin-bottom: 16px;
    font-size: 1rem;
    line-height: 1.9;
}

.about-brief-text .btn {
    margin-top: 24px;
}

.about-brief-visual {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--primary), var(--teal));
}

.about-brief-visual::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 30% 40%, rgba(200, 165, 91, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 70% 70%, rgba(45, 125, 125, 0.3) 0%, transparent 50%);
}

.about-brief-visual-content {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 20px;
}

.about-brief-visual-content .icon-block {
    width: 100px;
    height: 100px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    backdrop-filter: blur(5px);
}

.about-brief-visual-content .title {
    color: var(--white);
    font-size: 1.4rem;
    font-weight: 700;
}

.about-brief-visual-content .sub {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

/* === Product Grid === */
.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--white);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    cursor: pointer;
}

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

.product-card-image {
    aspect-ratio: 4/3;
    position: relative;
    overflow: hidden;
}

.product-card-bg {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3.5rem;
    transition: transform 0.6s ease;
}

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

.product-card-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(10, 37, 64, 0.6) 0%, transparent 50%);
    opacity: 0;
    transition: opacity var(--transition);
    display: flex;
    align-items: flex-end;
    justify-content: center;
    padding-bottom: 20px;
}

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

.product-card-overlay .btn {
    padding: 10px 28px;
    font-size: 0.85rem;
    transform: translateY(20px);
    transition: transform var(--transition);
}

.product-card:hover .product-card-overlay .btn {
    transform: translateY(0);
}

.product-card-info {
    padding: 24px;
    text-align: center;
}

.product-card-info .num {
    font-size: 0.8rem;
    color: var(--accent);
    font-weight: 700;
    letter-spacing: 2px;
    margin-bottom: 8px;
}

.product-card-info h4 {
    font-size: 1.15rem;
    margin-bottom: 4px;
}

.product-card-info .en {
    font-size: 0.75rem;
    color: var(--text-light);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Product category backgrounds */
.bg-grad-1 { background: linear-gradient(135deg, #0a2540, #134e6f); }
.bg-grad-2 { background: linear-gradient(135deg, #1a5f5f, #2d7d7d); }
.bg-grad-3 { background: linear-gradient(135deg, #c8a55b, #b08e3e); }
.bg-grad-4 { background: linear-gradient(135deg, #2c3e50, #34495e); }
.bg-grad-5 { background: linear-gradient(135deg, #134e6f, #2d7d7d); }
.bg-grad-6 { background: linear-gradient(135deg, #b08e3e, #8b6f2a); }

.bg-grad-1 .product-card-bg,
.bg-grad-2 .product-card-bg,
.bg-grad-3 .product-card-bg,
.bg-grad-4 .product-card-bg,
.bg-grad-5 .product-card-bg,
.bg-grad-6 .product-card-bg {
    color: rgba(255, 255, 255, 0.4);
}

/* === Case Gallery === */
.case-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.case-tab {
    padding: 10px 28px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-light);
    background: var(--bg-gray);
    border-radius: 50px;
    cursor: pointer;
    transition: all var(--transition);
    border: 2px solid transparent;
}

.case-tab:hover {
    color: var(--primary);
}

.case-tab.active {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

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

.case-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--white);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    cursor: pointer;
}

.case-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.case-card-image {
    aspect-ratio: 3/2;
    position: relative;
    overflow: hidden;
}

.case-card-image .case-card-bg {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    transition: transform 0.6s ease;
}

.case-card:hover .case-card-image .case-card-bg {
    transform: scale(1.08);
}

.case-card-info {
    padding: 24px;
}

.case-card-info .tag {
    display: inline-block;
    padding: 4px 12px;
    background: var(--bg-gray);
    color: var(--teal);
    font-size: 0.75rem;
    border-radius: var(--radius-sm);
    margin-bottom: 12px;
    font-weight: 500;
}

.case-card-info h4 {
    font-size: 1.1rem;
    margin-bottom: 8px;
}

.case-card-info p {
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* === News Section === */
.news-tabs {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 50px;
}

.news-tab {
    padding: 10px 28px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-light);
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
}

.news-tab.active {
    color: var(--accent);
    border-bottom-color: var(--accent);
}

.news-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 30px;
}

.news-featured {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    background: var(--white);
}

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

.news-featured-image {
    aspect-ratio: 16/9;
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, var(--primary), var(--teal));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: rgba(255, 255, 255, 0.3);
}

.news-featured-info {
    padding: 30px;
}

.news-featured-info .date {
    font-size: 0.8rem;
    color: var(--accent);
    font-weight: 600;
    margin-bottom: 8px;
}

.news-featured-info h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
    line-height: 1.4;
}

.news-featured-info p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

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

.news-item {
    display: flex;
    gap: 20px;
    padding: 20px;
    border-radius: var(--radius-md);
    transition: all var(--transition);
    background: var(--white);
    border: 1px solid var(--border);
    cursor: pointer;
}

.news-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateX(4px);
    border-color: var(--accent);
}

.news-item-date {
    flex-shrink: 0;
    text-align: center;
    width: 60px;
    padding: 8px 0;
    background: var(--bg-gray);
    border-radius: var(--radius-sm);
    transition: background var(--transition);
}

.news-item:hover .news-item-date {
    background: var(--accent);
}

.news-item-date .day {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    transition: color var(--transition);
}

.news-item:hover .news-item-date .day {
    color: var(--white);
}

.news-item-date .month {
    font-size: 0.7rem;
    color: var(--text-light);
    margin-top: 4px;
    transition: color var(--transition);
}

.news-item:hover .news-item-date .month {
    color: rgba(255, 255, 255, 0.8);
}

.news-item-info {
    flex: 1;
    overflow: hidden;
}

.news-item-info h4 {
    font-size: 1rem;
    margin-bottom: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
    transition: color var(--transition);
}

.news-item:hover .news-item-info h4 {
    color: var(--accent);
}

.news-item-info p {
    font-size: 0.8rem;
    color: var(--text-light);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* === Advantages Section === */
.advantage-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.advantage-card {
    text-align: center;
    padding: 40px 24px;
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all var(--transition);
}

.advantage-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-6px);
    border-color: rgba(200, 165, 91, 0.3);
}

.advantage-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--accent), var(--accent-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    color: var(--white);
}

.advantage-card h4 {
    color: var(--white);
    font-size: 1.1rem;
    margin-bottom: 10px;
}

.advantage-card p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.85rem;
    line-height: 1.7;
}

/* === CTA Section === */
.cta-section {
    position: relative;
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    text-align: center;
    overflow: hidden;
}

.cta-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 50%, rgba(200, 165, 91, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 50%, rgba(45, 125, 125, 0.2) 0%, transparent 50%);
}

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

.cta-section h2 {
    color: var(--white);
    margin-bottom: 16px;
}

.cta-section p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 1.1rem;
    margin-bottom: 32px;
}

.cta-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

/* === Footer === */
.footer {
    background: var(--bg-dark);
    color: rgba(255, 255, 255, 0.6);
    padding: 70px 0 0;
}

.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 50px;
    padding-bottom: 50px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand .logo {
    color: var(--white);
    margin-bottom: 20px;
}

.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.8;
    margin-bottom: 20px;
}

.footer-social {
    display: flex;
    gap: 12px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    transition: all var(--transition);
}

.footer-social a:hover {
    background: var(--accent);
    color: var(--white);
    transform: translateY(-3px);
}

.footer-col h5 {
    color: var(--white);
    font-size: 1rem;
    margin-bottom: 20px;
    font-weight: 600;
}

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    font-size: 0.9rem;
    transition: all var(--transition);
}

.footer-col ul li a:hover {
    color: var(--accent);
    padding-left: 6px;
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 16px;
    font-size: 0.9rem;
}

.footer-contact li .icon {
    color: var(--accent);
    flex-shrink: 0;
    margin-top: 2px;
}

.footer-bottom {
    padding: 24px 0;
    text-align: center;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.4);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.5);
}

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

/* === About Page Specific === */
.about-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-intro-text p {
    margin-bottom: 16px;
    line-height: 1.9;
}

.about-intro-visual {
    border-radius: var(--radius-lg);
    overflow: hidden;
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--primary), var(--teal));
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-intro-visual::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 30% 40%, rgba(200, 165, 91, 0.2) 0%, transparent 50%);
}

.about-intro-visual .big-icon {
    font-size: 5rem;
    color: rgba(255, 255, 255, 0.25);
    z-index: 1;
}

/* Timeline */
.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: 20px 0;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    width: 50%;
    padding: 20px 40px;
    margin-bottom: 20px;
}

.timeline-item:nth-child(odd) {
    left: 0;
    text-align: right;
}

.timeline-item:nth-child(even) {
    left: 50%;
}

.timeline-item::after {
    content: "";
    position: absolute;
    top: 28px;
    width: 14px;
    height: 14px;
    background: var(--accent);
    border: 3px solid var(--white);
    border-radius: 50%;
    box-shadow: 0 0 0 3px var(--accent);
    z-index: 1;
}

.timeline-item:nth-child(odd)::after {
    right: -7px;
}

.timeline-item:nth-child(even)::after {
    left: -7px;
}

.timeline-year {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent);
    margin-bottom: 6px;
}

.timeline-item h4 {
    margin-bottom: 8px;
}

.timeline-item p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.7;
}

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

.culture-card {
    text-align: center;
    padding: 50px 30px;
    border-radius: var(--radius-lg);
    background: var(--white);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
    border-top: 4px solid transparent;
}

.culture-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-6px);
    border-top-color: var(--accent);
}

.culture-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 24px;
    background: linear-gradient(135deg, var(--primary), var(--teal));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.2rem;
    color: var(--white);
}

.culture-card h4 {
    margin-bottom: 12px;
    font-size: 1.2rem;
}

.culture-card p {
    font-size: 0.9rem;
    color: var(--text-light);
    line-height: 1.8;
}

/* === Product Page Specific === */
.product-banner-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-bottom: 60px;
}

.product-banner-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    position: relative;
    aspect-ratio: 16/10;
    cursor: pointer;
    transition: all var(--transition);
}

.product-banner-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.product-banner-card .bg {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 5rem;
    color: rgba(255, 255, 255, 0.2);
    transition: transform 0.6s ease;
}

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

.product-banner-card .overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.6) 0%, transparent 60%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 30px;
}

.product-banner-card .overlay h3 {
    color: var(--white);
    font-size: 1.5rem;
    margin-bottom: 6px;
}

.product-banner-card .overlay .en {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.85rem;
    letter-spacing: 1px;
}

/* Product detail list */
.product-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-detail-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--white);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition);
}

.product-detail-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.product-detail-card .image {
    aspect-ratio: 4/3;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3.5rem;
    color: rgba(255, 255, 255, 0.25);
    position: relative;
    overflow: hidden;
}

.product-detail-card .image::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 30% 30%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
}

.product-detail-card .info {
    padding: 24px;
}

.product-detail-card .info h4 {
    font-size: 1.15rem;
    margin-bottom: 10px;
}

.product-detail-card .info p {
    font-size: 0.85rem;
    color: var(--text-light);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-detail-card .info .features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 16px;
}

.product-detail-card .info .feature-tag {
    padding: 4px 12px;
    background: var(--bg-gray);
    border-radius: 50px;
    font-size: 0.75rem;
    color: var(--teal);
    font-weight: 500;
}

/* === Contact Page === */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 50px;
}

.contact-info-card {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: var(--radius-lg);
    padding: 50px 40px;
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.contact-info-card::before {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 80% 20%, rgba(200, 165, 91, 0.15) 0%, transparent 50%);
}

.contact-info-card > * {
    position: relative;
    z-index: 1;
}

.contact-info-card h3 {
    color: var(--white);
    margin-bottom: 30px;
}

.contact-info-item {
    display: flex;
    gap: 16px;
    margin-bottom: 28px;
}

.contact-info-item .icon {
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: var(--accent);
    flex-shrink: 0;
}

.contact-info-item .text h5 {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.85rem;
    margin-bottom: 4px;
    font-weight: 500;
}

.contact-info-item .text p {
    color: rgba(255, 255, 255, 0.65);
    font-size: 0.9rem;
    line-height: 1.6;
}

.contact-form {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 50px 40px;
    box-shadow: var(--shadow-md);
}

.contact-form h3 {
    margin-bottom: 30px;
}

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

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

.form-group label {
    display: block;
    font-size: 0.9rem;
    color: var(--text-dark);
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group label .req {
    color: #e74c3c;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.95rem;
    font-family: inherit;
    color: var(--text-dark);
    background: var(--bg-light);
    transition: all var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    background: var(--white);
    box-shadow: 0 0 0 3px rgba(200, 165, 91, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* Map section */
.map-section {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    background: linear-gradient(135deg, var(--primary), var(--teal));
    aspect-ratio: 21/9;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.map-section::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
    background-size: 40px 40px;
}

.map-section .map-content {
    text-align: center;
    color: var(--white);
    z-index: 1;
}

.map-section .map-content .icon {
    font-size: 3rem;
    margin-bottom: 16px;
    color: var(--accent);
}

.map-section .map-content h3 {
    color: var(--white);
    margin-bottom: 8px;
}

.map-section .map-content p {
    color: rgba(255, 255, 255, 0.7);
}

/* === Animations === */
.fade-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

.fade-left {
    opacity: 0;
    transform: translateX(-40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.fade-right {
    opacity: 0;
    transform: translateX(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.fade-right.visible {
    opacity: 1;
    transform: translateX(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }

/* === Floating Contact Widget === */
.float-contact {
    position: fixed;
    right: 20px;
    bottom: 30px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.float-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    color: var(--white);
    cursor: pointer;
    transition: all var(--transition);
    box-shadow: var(--shadow-md);
    border: none;
}

.float-btn.tel { background: var(--accent); }
.float-btn.wechat { background: #07c160; }
.float-btn.top { background: var(--primary); }

.float-btn:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

/* === Responsive === */
@media (max-width: 1024px) {
    .nav {
        position: fixed;
        top: var(--header-h);
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        gap: 0;
        box-shadow: var(--shadow-md);
        transform: translateY(-150%);
        transition: transform var(--transition);
    }

    .nav.open {
        transform: translateY(0);
    }

    .nav-item {
        width: 100%;
    }

    .nav-link {
        padding: 14px 20px;
        border-bottom: 1px solid var(--border);
    }

    .menu-toggle {
        display: flex;
    }

    .header-tel {
        display: none;
    }

    .about-brief,
    .about-intro {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

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

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

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

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

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

@media (max-width: 640px) {
    :root {
        --gutter: 16px;
    }

    .section {
        padding: 60px 0;
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-stats {
        gap: 24px;
        flex-wrap: wrap;
    }

    .hero-stat .num {
        font-size: 1.8rem;
    }

    .product-grid,
    .case-grid,
    .product-list,
    .product-banner-grid,
    .advantage-grid {
        grid-template-columns: 1fr;
    }

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

    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        width: 100%;
        padding-left: 50px;
        padding-right: 0;
        text-align: left !important;
        left: 0 !important;
    }

    .timeline-item::after {
        left: 13px !important;
        right: auto !important;
    }

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

    .case-tabs,
    .news-tabs {
        gap: 4px;
    }

    .case-tab,
    .news-tab {
        padding: 8px 16px;
        font-size: 0.85rem;
    }
}