/*!
 * 现阳新能源 - 主样式表
 * 设计风格：科技感 + 高端家居
 * Version: 1.0.0
 */

/* ============================================================
 * CSS Custom Properties (主题变量)
 * ============================================================ */
:root {
    /* 品牌色彩 */
    --xy-color-primary: #1e40af;      /* 深海蓝 - 主色调（科技、信任） */
    --xy-color-primary-hover: #1e3a8a;
    --xy-color-primary-light: #dbeafe;
    --xy-color-secondary: #0f766e;    /* 墨绿 - 辅助色（自然、舒适） */
    --xy-color-accent: #f59e0b;       /* 暖金 - 强调色（温暖、高端） */
    --xy-color-accent-hover: #d97706;

    /* 中性色 */
    --xy-color-white: #ffffff;
    --xy-color-bg: #f8fafc;
    --xy-color-bg-alt: #f1f5f9;
    --xy-color-bg-dark: #0f172a;
    --xy-color-border: #e2e8f0;
    --xy-color-text: #1e293b;
    --xy-color-text-light: #64748b;
    --xy-color-text-muted: #94a3b8;

    /* 语义色 */
    --xy-color-success: #10b981;
    --xy-color-error: #ef4444;
    --xy-color-warning: #f59e0b;

    /* 排版 */
    --xy-font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    --xy-font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", monospace;

    /* 间距 */
    --xy-space-xs: 4px;
    --xy-space-sm: 8px;
    --xy-space-md: 16px;
    --xy-space-lg: 24px;
    --xy-space-xl: 32px;
    --xy-space-2xl: 48px;
    --xy-space-3xl: 64px;
    --xy-space-4xl: 96px;

    /* 圆角 */
    --xy-radius-sm: 4px;
    --xy-radius-md: 8px;
    --xy-radius-lg: 12px;
    --xy-radius-xl: 16px;
    --xy-radius-full: 9999px;

    /* 阴影 */
    --xy-shadow-sm: 0 1px 2px 0 rgba(0,0,0,.05);
    --xy-shadow-md: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -2px rgba(0,0,0,.1);
    --xy-shadow-lg: 0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -4px rgba(0,0,0,.1);
    --xy-shadow-xl: 0 20px 25px -5px rgba(0,0,0,.1), 0 8px 10px -6px rgba(0,0,0,.1);

    /* 过渡 */
    --xy-transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --xy-transition-fast: 0.15s ease;

    /* 布局 */
    --xy-header-height: 72px;
    --xy-container-max: 1200px;
    --xy-container-narrow: 800px;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--xy-font-sans);
    font-size: 1rem;
    line-height: 1.7;
    color: var(--xy-color-text);
    background: var(--xy-color-white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

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

a {
    color: var(--xy-color-primary);
    text-decoration: none;
    transition: color var(--xy-transition-fast);
}
a:hover { color: var(--xy-color-primary-hover); }

ul, ol { list-style: none; }

input, select, textarea, button {
    font-family: inherit;
    font-size: inherit;
}

/* ============================================================
 * Container
 * ============================================================ */
.xy-container {
    width: 100%;
    max-width: var(--xy-container-max);
    margin: 0 auto;
    padding: 0 var(--xy-space-lg);
}
.xy-container--narrow {
    max-width: var(--xy-container-narrow);
}

/* ============================================================
 * Header
 * ============================================================ */
.xy-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: var(--xy-header-height);
    background: rgba(255,255,255,.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: all var(--xy-transition);
}
.xy-header.is-scrolled {
    border-bottom-color: var(--xy-color-border);
    box-shadow: var(--xy-shadow-sm);
}
.xy-header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

/* Logo */
.xy-logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
}
.xy-logo__text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--xy-color-primary);
    white-space: nowrap;
}
.xy-logo img { height: 48px; width: auto; }

/* Navigation */
.xy-nav { flex: 1; display: flex; justify-content: center; }
.xy-nav__menu {
    display: flex;
    gap: var(--xy-space-xs);
}
.xy-nav__menu > .menu-item { position: relative; }
.xy-nav-arrow { margin-left: 6px; font-size: .75em; }
.xy-nav__menu .sub-menu {
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    z-index: 1100;
    min-width: 220px;
    padding: 8px;
    border: 1px solid var(--xy-color-border);
    border-radius: var(--xy-radius-md);
    background: var(--xy-color-white);
    box-shadow: var(--xy-shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity .18s ease, transform .18s ease, visibility .18s ease;
}
.xy-nav__menu .sub-menu .menu-item { position: relative; }
.xy-nav__menu .sub-menu .sub-menu { top: -8px; left: calc(100% + 6px); }
.xy-nav__menu .menu-item:hover > .sub-menu,
.xy-nav__menu .menu-item:focus-within > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.xy-nav__menu .sub-menu a { white-space: nowrap; }
.xy-nav__menu a {
    display: block;
    padding: var(--xy-space-sm) var(--xy-space-md);
    color: var(--xy-color-text);
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--xy-radius-sm);
    transition: all var(--xy-transition-fast);
}
.xy-nav__menu a:hover,
.xy-nav__menu .is-current > a,
.xy-nav__menu .current-menu-item > a {
    color: var(--xy-color-primary);
    background: var(--xy-color-primary-light);
}

/* Header Actions */
.xy-header__actions {
    display: flex;
    align-items: center;
    gap: var(--xy-space-md);
    flex-shrink: 0;
}

/* CTA Button in Header */
.xy-btn--cta { white-space: nowrap; }

/* Hamburger */
.xy-hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 36px;
    height: 36px;
    padding: 6px;
    border: none;
    background: transparent;
    cursor: pointer;
}
.xy-hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--xy-color-text);
    border-radius: 2px;
    transition: all var(--xy-transition-fast);
}
.xy-hamburger.is-active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.xy-hamburger.is-active span:nth-child(2) {
    opacity: 0;
}
.xy-hamburger.is-active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* ============================================================
 * Footer
 * ============================================================ */
.xy-footer {
    background: var(--xy-color-bg-dark);
    color: #e2e8f0;
    padding: var(--xy-space-3xl) 0 var(--xy-space-xl);
}
.xy-footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.5fr 1fr;
    gap: var(--xy-space-xl);
}
.xy-footer__title {
    color: var(--xy-color-white);
    font-size: 1.125rem;
    margin-bottom: var(--xy-space-md);
    position: relative;
    padding-bottom: var(--xy-space-sm);
}
.xy-footer__title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 32px;
    height: 2px;
    background: var(--xy-color-accent);
}
.xy-footer__about-text {
    color: #94a3b8;
    font-size: 0.875rem;
    line-height: 1.7;
}
.xy-footer__slogan {
    color: var(--xy-color-accent);
    margin-top: var(--xy-space-sm);
    font-size: 0.875rem;
}
.xy-footer__menu li { margin-bottom: var(--xy-space-sm); }
.xy-footer__menu a {
    color: #94a3b8;
    font-size: 0.875rem;
    transition: color var(--xy-transition-fast);
}
.xy-footer__menu a:hover { color: var(--xy-color-white); }

.xy-footer__contact-list li {
    display: flex;
    align-items: flex-start;
    gap: var(--xy-space-sm);
    margin-bottom: var(--xy-space-sm);
    color: #94a3b8;
    font-size: 0.875rem;
}
.xy-footer__contact-list svg {
    flex-shrink: 0;
    margin-top: 3px;
    color: var(--xy-color-accent);
}
.xy-qrcode {
    width: 120px;
    height: 120px;
    border-radius: var(--xy-radius-md);
    background: var(--xy-color-white);
    padding: var(--xy-space-sm);
}
.xy-qrcode-placeholder {
    width: 120px;
    height: 120px;
    border: 2px dashed #475569;
    border-radius: var(--xy-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #64748b;
    font-size: 0.75rem;
}
.xy-footer__wechat-text {
    margin-top: var(--xy-space-sm);
    font-size: 0.875rem;
    color: #94a3b8;
}
.xy-footer__bottom {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    margin-top: var(--xy-space-2xl);
    padding-top: var(--xy-space-lg);
    border-top: 1px solid #1e293b;
    font-size: 0.8125rem;
    color: #64748b;
}
.xy-footer__bottom a { color: #64748b; }
.xy-footer__bottom a:hover { color: var(--xy-color-white); }

/* ============================================================
 * Buttons
 * ============================================================ */
.xy-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--xy-space-sm);
    padding: 10px 24px;
    font-weight: 600;
    font-size: 0.9375rem;
    line-height: 1.5;
    border: 2px solid transparent;
    border-radius: var(--xy-radius-md);
    cursor: pointer;
    transition: all var(--xy-transition);
    white-space: nowrap;
    text-decoration: none;
}
.xy-btn--primary {
    background: linear-gradient(135deg, var(--xy-color-primary), #2563eb);
    color: var(--xy-color-white);
    border-color: transparent;
    box-shadow: 0 2px 8px rgba(30,64,175,.25);
}
.xy-btn--primary:hover {
    background: linear-gradient(135deg, var(--xy-color-primary-hover), #1d4ed8);
    color: var(--xy-color-white);
    transform: translateY(-1px);
    box-shadow: 0 4px 16px rgba(30,64,175,.35);
}
.xy-btn--outline {
    background: transparent;
    color: var(--xy-color-primary);
    border-color: var(--xy-color-primary);
}
.xy-btn--outline:hover {
    background: var(--xy-color-primary);
    color: var(--xy-color-white);
}
.xy-btn--link {
    background: transparent;
    border: none;
    padding: 4px 0;
    color: var(--xy-color-primary);
    font-weight: 500;
}
.xy-btn--link:hover { color: var(--xy-color-primary-hover); }
.xy-btn--lg { padding: 14px 32px; font-size: 1rem; border-radius: var(--xy-radius-lg); }
.xy-btn--sm { padding: 6px 16px; font-size: 0.8125rem; }
.xy-btn svg { flex-shrink: 0; }

/* ============================================================
 * Sections
 * ============================================================ */
.xy-section {
    padding: var(--xy-space-4xl) 0;
}
.xy-section--light {
    background: var(--xy-color-bg);
}
.xy-section--dark {
    background: var(--xy-color-bg-dark);
    color: var(--xy-color-white);
}
.xy-section__header {
    text-align: center;
    margin-bottom: var(--xy-space-2xl);
}
.xy-section__title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--xy-color-text);
    margin-bottom: var(--xy-space-sm);
}
.xy-section--dark .xy-section__title {
    color: var(--xy-color-white);
}
.xy-section__subtitle {
    font-size: 1.125rem;
    color: var(--xy-color-text-light);
    max-width: 600px;
    margin: 0 auto;
}
.xy-section__subheading {
    font-size: 1.25rem;
    font-weight: 600;
    text-align: center;
    margin-bottom: var(--xy-space-xl);
}
.xy-section__action {
    text-align: center;
    margin-top: var(--xy-space-xl);
}

/* ============================================================
 * Hero Banner
 * ============================================================ */
.xy-hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    overflow: hidden;
}
.xy-hero__overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15,23,42,.85) 0%, rgba(30,64,175,.6) 50%, rgba(15,23,42,.7) 100%);
}
.xy-hero__bg-gradient {
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 40%, #1e40af 70%, #0f172a 100%);
}
.xy-hero__content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: var(--xy-color-white);
    padding: calc(var(--xy-header-height) + var(--xy-space-xl)) 0;
}
.xy-hero__title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--xy-space-md);
    letter-spacing: -0.02em;
}
.xy-hero__subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: rgba(255,255,255,.8);
    max-width: 650px;
    margin: 0 auto var(--xy-space-xl);
    line-height: 1.7;
}
.xy-hero__actions {
    display: flex;
    gap: var(--xy-space-md);
    justify-content: center;
    flex-wrap: wrap;
}
.xy-hero__actions .xy-btn--outline {
    color: var(--xy-color-white);
    border-color: rgba(255,255,255,.4);
}
.xy-hero__actions .xy-btn--outline:hover {
    border-color: var(--xy-color-white);
    background: rgba(255,255,255,.1);
}

/* Scroll hint */
.xy-hero__scroll-hint {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
}
.xy-hero__scroll-hint span {
    display: block;
    width: 24px;
    height: 40px;
    border: 2px solid rgba(255,255,255,.4);
    border-radius: 12px;
    position: relative;
}
.xy-hero__scroll-hint span::after {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: rgba(255,255,255,.8);
    border-radius: 2px;
    animation: xy-scroll 2s ease-in-out infinite;
}
@keyframes xy-scroll {
    0%, 100% { top: 8px; opacity: 1; }
    50% { top: 20px; opacity: .3; }
}

/* ============================================================
 * Brand Strength
 * ============================================================ */
.xy-brand__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--xy-space-xl);
}
.xy-brand__card {
    text-align: center;
    padding: var(--xy-space-xl);
    border-radius: var(--xy-radius-lg);
    background: var(--xy-color-white);
    border: 1px solid var(--xy-color-border);
    transition: all var(--xy-transition);
}
.xy-brand__card:hover {
    transform: translateY(-4px);
    box-shadow: var(--xy-shadow-lg);
    border-color: var(--xy-color-primary-light);
}
.xy-brand__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    border-radius: var(--xy-radius-xl);
    background: linear-gradient(135deg, var(--xy-color-primary-light), #eff6ff);
    color: var(--xy-color-primary);
    margin-bottom: var(--xy-space-md);
}
.xy-brand__title {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--xy-space-sm);
    color: var(--xy-color-text);
}
.xy-brand__desc {
    color: var(--xy-color-text-light);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* ============================================================
 * Business Cards
 * ============================================================ */
.xy-business__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--xy-space-xl);
}
.xy-business__card {
    position: relative;
    border-radius: var(--xy-radius-lg);
    overflow: hidden;
    min-height: 400px;
    display: flex;
    align-items: flex-end;
    transition: all var(--xy-transition);
}
.xy-business__card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(0deg, var(--card-color, var(--xy-color-primary)) 0%, rgba(15,23,42,.3) 50%, rgba(15,23,42,.1) 100%);
    z-index: 1;
}
.xy-business__card:hover {
    transform: translateY(-4px);
    box-shadow: var(--xy-shadow-xl);
}
.xy-business__bg {
    position: absolute;
    inset: 0;
}
.xy-business__bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.xy-business__card-body {
    position: relative;
    z-index: 2;
    padding: var(--xy-space-xl);
    color: var(--xy-color-white);
}
.xy-business__tag {
    display: inline-block;
    padding: 2px 12px;
    background: rgba(255,255,255,.2);
    border-radius: var(--xy-radius-full);
    font-size: 0.8125rem;
    margin-bottom: var(--xy-space-sm);
}
.xy-business__card-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--xy-space-sm);
}
.xy-business__card-desc {
    font-size: 0.9375rem;
    line-height: 1.6;
    opacity: .9;
    margin-bottom: var(--xy-space-md);
}
.xy-business__card-body .xy-btn--link {
    color: var(--xy-color-white);
}

/* ============================================================
 * Tech Highlights
 * ============================================================ */
.xy-tech-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--xy-space-lg);
}
.xy-tech-item {
    padding: var(--xy-space-xl);
    border-radius: var(--xy-radius-lg);
    background: var(--xy-color-white);
    border: 1px solid var(--xy-color-border);
    transition: all var(--xy-transition);
}
.xy-tech-item:hover {
    border-color: var(--xy-color-primary-light);
    box-shadow: var(--xy-shadow-md);
}
.xy-tech-item__num {
    font-size: 2rem;
    font-weight: 800;
    color: var(--xy-color-primary);
    opacity: .2;
    margin-bottom: var(--xy-space-sm);
}
.xy-tech-item h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--xy-space-sm);
}
.xy-tech-item p {
    color: var(--xy-color-text-light);
    font-size: 0.9375rem;
}

/* ============================================================
 * Cases Grid
 * ============================================================ */
.xy-case-filter {
    display: flex;
    justify-content: center;
    gap: var(--xy-space-sm);
    margin-bottom: var(--xy-space-xl);
    flex-wrap: wrap;
}
.xy-case-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--xy-space-lg);
}
.xy-case-card {
    border-radius: var(--xy-radius-lg);
    overflow: hidden;
    background: var(--xy-color-white);
    border: 1px solid var(--xy-color-border);
    transition: all var(--xy-transition);
}
.xy-case-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--xy-shadow-lg);
}
.xy-case-card__image {
    position: relative;
    display: block;
    aspect-ratio: 4/3;
    overflow: hidden;
}
.xy-case-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .5s ease;
}
.xy-case-card:hover .xy-case-card__image img {
    transform: scale(1.05);
}
.xy-case-card__overlay {
    position: absolute;
    inset: 0;
    background: rgba(30,64,175,.7);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-weight: 600;
    opacity: 0;
    transition: opacity var(--xy-transition);
}
.xy-case-card:hover .xy-case-card__overlay { opacity: 1; }
.xy-case-card__placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--xy-color-primary-light), #e0e7ff);
}
.xy-case-card__body {
    padding: var(--xy-space-md);
}
.xy-case-card__cat {
    font-size: 0.75rem;
    color: var(--xy-color-primary);
    font-weight: 600;
    text-transform: uppercase;
}
.xy-case-card__title {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-top: var(--xy-space-xs);
}
.xy-case-card__title a {
    color: var(--xy-color-text);
}
.xy-case-card__title a:hover { color: var(--xy-color-primary); }

/* ============================================================
 * CTA Section
 * ============================================================ */
.xy-cta-section {
    padding: var(--xy-space-2xl) 0 var(--xy-space-4xl);
}
.xy-cta-card {
    text-align: center;
    padding: var(--xy-space-3xl) var(--xy-space-xl);
    background: linear-gradient(135deg, var(--xy-color-primary), #1e3a5f);
    border-radius: var(--xy-radius-xl);
    color: var(--xy-color-white);
}
.xy-cta-card h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--xy-space-md);
}
.xy-cta-card p {
    font-size: 1.125rem;
    opacity: .85;
    margin-bottom: var(--xy-space-xl);
}
.xy-cta-card__actions {
    display: flex;
    gap: var(--xy-space-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ============================================================
 * Pain Points Grid
 * ============================================================ */
.xy-pain-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--xy-space-md);
}
.xy-pain-card {
    text-align: center;
    padding: var(--xy-space-lg);
    border-radius: var(--xy-radius-lg);
    background: var(--xy-color-white);
    border: 1px solid var(--xy-color-border);
    transition: all var(--xy-transition);
}
.xy-pain-card:hover {
    border-color: var(--xy-color-error);
    box-shadow: var(--xy-shadow-md);
}
.xy-pain-card__icon {
    color: var(--xy-color-error);
    margin-bottom: var(--xy-space-sm);
}
.xy-pain-card__title {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--xy-space-xs);
}
.xy-pain-card__desc {
    font-size: 0.875rem;
    color: var(--xy-color-text-light);
    line-height: 1.5;
}

/* ============================================================
 * Wuheng Cards
 * ============================================================ */
.xy-wuheng-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--xy-space-lg);
}
.xy-wuheng-card {
    text-align: center;
    padding: var(--xy-space-xl) var(--xy-space-md);
    border-radius: var(--xy-radius-lg);
    background: rgba(255,255,255,.05);
    border: 1px solid rgba(255,255,255,.1);
    transition: all var(--xy-transition);
}
.xy-wuheng-card:hover {
    background: rgba(255,255,255,.1);
    transform: translateY(-4px);
}
.xy-wuheng-card__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: var(--card-color, #3b82f6);
    color: #fff;
    margin-bottom: var(--xy-space-md);
}
.xy-wuheng-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--xy-space-sm);
    color: #fff;
}
.xy-wuheng-card p {
    font-size: 0.875rem;
    line-height: 1.6;
    color: rgba(255,255,255,.7);
}

/* ============================================================
 * Scenario Cards
 * ============================================================ */
.xy-scenario-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: var(--xy-space-lg);
}
.xy-scenario-card {
    text-align: center;
    padding: var(--xy-space-xl) var(--xy-space-md);
    border-radius: var(--xy-radius-lg);
    background: var(--xy-color-white);
    border: 1px solid var(--xy-color-border);
    transition: all var(--xy-transition);
}
.xy-scenario-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--xy-shadow-lg);
    border-color: var(--xy-color-primary-light);
}
.xy-scenario-card__icon {
    color: var(--xy-color-primary);
    margin-bottom: var(--xy-space-md);
}
.xy-scenario-card h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--xy-space-sm);
}
.xy-scenario-card p {
    font-size: 0.875rem;
    color: var(--xy-color-text-light);
    line-height: 1.5;
}

/* ============================================================
 * Product Page
 * ============================================================ */
.xy-product-category {
    margin-top: var(--xy-space-2xl);
}
.xy-product-filter {
    max-width: 680px;
    margin: var(--xy-space-xl) auto var(--xy-space-2xl);
    padding: var(--xy-space-lg);
    border: 1px solid var(--xy-color-border);
    border-radius: var(--xy-radius-lg);
    background: var(--xy-color-white);
    box-shadow: var(--xy-shadow-sm);
}
.xy-product-filter label {
    display: block;
    margin-bottom: var(--xy-space-sm);
    font-weight: 700;
    color: var(--xy-color-text);
}
.xy-product-filter__select {
    width: 100%;
    min-height: 48px;
    padding: 0 44px 0 14px;
    border: 1px solid var(--xy-color-border);
    border-radius: var(--xy-radius-md);
    background: var(--xy-color-white);
    color: var(--xy-color-text);
    font-size: 1rem;
}
.xy-product-card[hidden] {
    display: none !important;
}
.xy-case-card[hidden] {
    display: none !important;
}
.xy-product-category__heading {
    margin-bottom: var(--xy-space-lg);
    padding-left: var(--xy-space-md);
    border-left: 4px solid var(--xy-color-primary);
}
.xy-product-category__heading h3 {
    margin: 0;
    font-size: 1.5rem;
    color: var(--xy-color-text);
}
.xy-product-category__heading p {
    margin: var(--xy-space-xs) 0 0;
    color: var(--xy-color-text-light);
}
.xy-product-category__empty {
    padding: var(--xy-space-lg);
    border: 1px dashed var(--xy-color-border);
    border-radius: var(--xy-radius-md);
    color: var(--xy-color-text-light);
    text-align: center;
    background: var(--xy-color-white);
}
.xy-product-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--xy-space-xl);
}
.xy-product-card {
    border-radius: var(--xy-radius-lg);
    overflow: hidden;
    background: var(--xy-color-white);
    border: 1px solid var(--xy-color-border);
    transition: all var(--xy-transition);
    display: flex;
    flex-direction: column;
}
.xy-product-card:hover {
    box-shadow: var(--xy-shadow-lg);
    border-color: var(--xy-color-primary-light);
}
.xy-product-card__image {
    aspect-ratio: 16/10;
    overflow: hidden;
    background: var(--xy-color-bg);
}
.xy-product-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .5s ease;
}
.xy-product-card:hover .xy-product-card__image img {
    transform: scale(1.05);
}
.xy-product-card__placeholder {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--xy-color-primary-light), #e0e7ff);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--xy-color-primary);
    font-weight: 700;
}
.xy-product-card__body {
    padding: var(--xy-space-lg);
    flex: 1;
    display: flex;
    flex-direction: column;
}
.xy-product-card__body h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--xy-space-sm);
}
.xy-product-card__body > p {
    color: var(--xy-color-text-light);
    font-size: 0.9375rem;
    margin-bottom: var(--xy-space-md);
    flex: 1;
}
.xy-product-card__params {
    display: flex;
    flex-wrap: wrap;
    gap: var(--xy-space-xs);
    margin-bottom: var(--xy-space-md);
}
.xy-param-tag {
    display: inline-block;
    padding: 2px 10px;
    background: var(--xy-color-bg);
    border-radius: var(--xy-radius-full);
    font-size: 0.8125rem;
    color: var(--xy-color-text-light);
}

/* Product detail */
.xy-product-detail-layout {
    display: grid;
    grid-template-columns: minmax(220px, 280px) minmax(0, 1fr);
    gap: var(--xy-space-2xl);
    align-items: start;
}
.xy-product-directory {
    position: sticky;
    top: calc(var(--xy-header-height) + var(--xy-space-lg));
    padding: var(--xy-space-lg);
    border: 1px solid var(--xy-color-border);
    border-radius: var(--xy-radius-lg);
    background: var(--xy-color-white);
    box-shadow: var(--xy-shadow-sm);
}
.xy-product-directory h2 {
    margin: 0 0 var(--xy-space-md);
    font-size: 1.25rem;
}
.xy-product-directory__all,
.xy-product-directory__list a {
    display: block;
    padding: 9px 12px;
    border-radius: var(--xy-radius-sm);
    color: var(--xy-color-text);
}
.xy-product-directory__all {
    margin-bottom: 4px;
    font-weight: 700;
    color: var(--xy-color-primary);
}
.xy-product-directory__list { margin: 0; padding: 0; list-style: none; }
.xy-product-directory__list .xy-product-directory__list {
    margin-left: 14px;
    padding-left: 10px;
    border-left: 1px solid var(--xy-color-border);
}
.xy-product-directory__list a:hover {
    color: var(--xy-color-primary);
    background: var(--xy-color-primary-light);
}
.xy-product-directory__list .is-active > a {
    color: var(--xy-color-primary);
    background: var(--xy-color-white);
    box-shadow: 0 6px 18px rgba(30, 64, 175, .2);
    font-weight: 700;
}
.xy-product-detail {
    min-width: 0;
    padding: var(--xy-space-xl);
    border: 1px solid var(--xy-color-border);
    border-radius: var(--xy-radius-lg);
    background: var(--xy-color-white);
}
.xy-product-detail__image {
    margin: 0 0 var(--xy-space-xl);
    overflow: hidden;
    border-radius: var(--xy-radius-lg);
    background: var(--xy-color-bg);
}
.xy-product-detail__image img { display: block; width: 100%; height: auto; }
.xy-product-detail__header h2 { margin: 0 0 var(--xy-space-sm); font-size: 2rem; }
.xy-product-detail__categories { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: var(--xy-space-lg); }
.xy-product-detail__categories a {
    padding: 4px 12px;
    border-radius: var(--xy-radius-full);
    background: var(--xy-color-primary-light);
    color: var(--xy-color-primary);
    font-size: .875rem;
}
.xy-product-detail__summary {
    margin-bottom: var(--xy-space-xl);
    padding: var(--xy-space-lg);
    border-left: 4px solid var(--xy-color-primary);
    background: var(--xy-color-bg);
    color: var(--xy-color-text-light);
    font-size: 1.05rem;
}
.xy-product-detail__introduction {
    margin-top: var(--xy-space-lg);
    padding-top: var(--xy-space-xl);
    border-top: 1px solid var(--xy-color-border);
}
.xy-product-detail__introduction > h3 {
    margin: 0 0 var(--xy-space-lg);
    font-size: 1.5rem;
}
.xy-product-detail__content { line-height: 1.85; }
.xy-product-detail__content img { max-width: 100%; height: auto; border-radius: var(--xy-radius-md); }

.xy-official-products { background: linear-gradient(180deg, #f8fbff 0%, #fff 100%); }
.xy-official-products__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--xy-space-lg);
}
.xy-official-products__item {
    display: flex;
    align-items: center;
    justify-content: center;
    aspect-ratio: 1;
    overflow: hidden;
    border: 1px solid var(--xy-color-border);
    border-radius: var(--xy-radius-lg);
    background: var(--xy-color-white);
    box-shadow: var(--xy-shadow-sm);
    transition: transform .25s ease, box-shadow .25s ease;
}
.xy-official-products__item:hover { transform: translateY(-5px); box-shadow: var(--xy-shadow-lg); }
.xy-official-products__item img { display: block; width: 100%; height: 100%; object-fit: contain; }

/* ============================================================
 * Commercial Page
 * ============================================================ */
.xy-value-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--xy-space-xl);
}
.xy-value-card {
    text-align: center;
    padding: var(--xy-space-xl);
    border-radius: var(--xy-radius-lg);
    background: var(--xy-color-white);
    border: 1px solid var(--xy-color-border);
    transition: all var(--xy-transition);
}
.xy-value-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--xy-shadow-lg);
}
.xy-value-card__num {
    display: inline-block;
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--xy-color-primary), #60a5fa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--xy-space-sm);
}
.xy-value-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--xy-space-sm);
}
.xy-value-card p {
    color: var(--xy-color-text-light);
    font-size: 0.9375rem;
    line-height: 1.7;
}

.xy-tech-principle {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: var(--xy-space-md);
    flex-wrap: wrap;
}
.xy-tech-principle__step {
    text-align: center;
    flex: 1;
    min-width: 160px;
    padding: var(--xy-space-md);
}
.xy-tech-principle__icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--xy-color-primary);
    color: #fff;
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--xy-space-sm);
}
.xy-tech-principle__step h4 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--xy-space-xs);
}
.xy-tech-principle__step p {
    font-size: 0.875rem;
    color: var(--xy-color-text-light);
}
.xy-tech-principle__arrow {
    font-size: 1.5rem;
    color: var(--xy-color-primary);
    padding-top: var(--xy-space-lg);
    display: flex;
    align-items: center;
}

/* ============================================================
 * About Page
 * ============================================================ */
.xy-about-intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--xy-space-3xl);
    align-items: center;
}
.xy-about-intro__text h2 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--xy-space-md);
}
.xy-about-intro__image img {
    border-radius: var(--xy-radius-lg);
    box-shadow: var(--xy-shadow-lg);
}
.xy-lead {
    font-size: 1.125rem;
    color: var(--xy-color-primary);
    font-weight: 500;
    line-height: 1.7;
    margin-bottom: var(--xy-space-md);
}
.xy-cert-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--xy-space-xl);
    margin-top: var(--xy-space-xl);
}
.xy-cert-card {
    border-radius: var(--xy-radius-lg);
    overflow: hidden;
    border: 1px solid var(--xy-color-border);
    transition: all var(--xy-transition);
}
.xy-cert-card:hover { box-shadow: var(--xy-shadow-md); }
.xy-cert-card img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
}
.xy-cert-card__placeholder {
    aspect-ratio: 4/3;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--xy-color-bg);
    color: var(--xy-color-text-light);
    font-size: 1rem;
}

.xy-promise-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--xy-space-lg);
}
.xy-promise-card {
    text-align: center;
    padding: var(--xy-space-xl);
    border-radius: var(--xy-radius-lg);
    background: var(--xy-color-white);
    border: 1px solid var(--xy-color-border);
    transition: all var(--xy-transition);
}
.xy-promise-card:hover { transform: translateY(-2px); box-shadow: var(--xy-shadow-md); }
.xy-promise-card h4 { font-size: 1.0625rem; margin-bottom: var(--xy-space-sm); }
.xy-promise-card p { font-size: 0.875rem; color: var(--xy-color-text-light); }

/* ============================================================
 * Contact Page
 * ============================================================ */
.xy-contact-layout {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: var(--xy-space-3xl);
    margin-bottom: var(--xy-space-3xl);
}
.xy-contact-info h3,
.xy-contact-form-section h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--xy-space-sm);
}
.xy-contact-info__lead {
    color: var(--xy-color-text-light);
    margin-bottom: var(--xy-space-xl);
}
.xy-contact-info__item {
    display: flex;
    gap: var(--xy-space-md);
    margin-bottom: var(--xy-space-lg);
}
.xy-contact-info__icon {
    flex-shrink: 0;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--xy-radius-md);
    background: var(--xy-color-primary-light);
    color: var(--xy-color-primary);
}
.xy-contact-info__item strong {
    display: block;
    font-size: 0.8125rem;
    color: var(--xy-color-text-light);
    margin-bottom: var(--xy-space-xs);
}
.xy-contact-wechat {
    margin-top: var(--xy-space-xl);
    padding: var(--xy-space-lg);
    background: var(--xy-color-bg);
    border-radius: var(--xy-radius-lg);
    text-align: center;
}
.xy-contact-wechat .xy-qrcode {
    width: 140px;
    height: 140px;
    margin: var(--xy-space-md) auto;
}
.xy-contact-wechat__hint {
    font-size: 0.875rem;
    color: var(--xy-color-text-light);
}

.xy-map-placeholder {
    margin-top: var(--xy-space-xl);
    border-radius: var(--xy-radius-lg);
    overflow: hidden;
    aspect-ratio: 16/6;
    background: var(--xy-color-bg);
    border: 1px solid var(--xy-color-border);
}
.xy-map-placeholder__inner {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--xy-color-text-light);
}
.xy-map-placeholder__inner p { margin-top: var(--xy-space-md); }

/* ============================================================
 * Form Styles
 * ============================================================ */
.xy-form__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--xy-space-md);
}
.xy-form__field--full { grid-column: 1 / -1; }
.xy-form__field label {
    display: block;
    font-weight: 600;
    margin-bottom: var(--xy-space-xs);
    font-size: 0.875rem;
}
.xy-form__field .required { color: var(--xy-color-error); }
.xy-form__field input,
.xy-form__field select,
.xy-form__field textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid var(--xy-color-border);
    border-radius: var(--xy-radius-md);
    background: var(--xy-color-white);
    transition: border-color var(--xy-transition-fast);
    outline: none;
}
.xy-form__field input:focus,
.xy-form__field select:focus,
.xy-form__field textarea:focus {
    border-color: var(--xy-color-primary);
    box-shadow: 0 0 0 3px var(--xy-color-primary-light);
}
.xy-form__submit {
    margin-top: var(--xy-space-lg);
}
.xy-form__response {
    margin-top: var(--xy-space-md);
    padding: var(--xy-space-md);
    border-radius: var(--xy-radius-md);
    font-weight: 500;
}
.xy-form__response.is-success {
    background: #ecfdf5;
    color: var(--xy-color-success);
    border: 1px solid #a7f3d0;
}
.xy-form__response.is-error {
    background: #fef2f2;
    color: var(--xy-color-error);
    border: 1px solid #fecaca;
}

/* ============================================================
 * Case Detail
 * ============================================================ */
.xy-case-hero {
    margin-bottom: var(--xy-space-xl);
    border-radius: var(--xy-radius-lg);
    overflow: hidden;
}
.xy-case-hero img { width: 100%; }
.xy-case-lightbox-trigger{position:relative;display:block;cursor:zoom-in}.xy-case-lightbox-hint{position:absolute;right:16px;bottom:16px;padding:7px 12px;border-radius:999px;background:rgba(15,23,42,.78);color:#fff;font-size:13px}.xy-lightbox{position:fixed;inset:0;z-index:100000;display:none;align-items:center;justify-content:center;padding:32px;background:rgba(3,8,15,.92)}.xy-lightbox.is-open{display:flex}.xy-lightbox__image{display:block;max-width:min(94vw,1600px);max-height:90vh;width:auto;height:auto;object-fit:contain;box-shadow:0 20px 70px rgba(0,0,0,.45)}.xy-lightbox__close{position:fixed;top:18px;right:24px;width:46px;height:46px;border:0;border-radius:50%;background:#fff;color:#111827;font-size:34px;line-height:42px;cursor:pointer}.xy-lightbox__close:hover{background:#e5e7eb}@media(max-width:768px){.xy-lightbox{padding:16px}.xy-lightbox__close{top:10px;right:10px}}
.xy-case-params {
    display: flex;
    gap: var(--xy-space-lg);
    flex-wrap: wrap;
    padding: var(--xy-space-lg);
    background: var(--xy-color-bg);
    border-radius: var(--xy-radius-lg);
    margin-bottom: var(--xy-space-xl);
}
.xy-case-param strong {
    display: block;
    font-size: 0.75rem;
    color: var(--xy-color-text-light);
    margin-bottom: var(--xy-space-xs);
}
.xy-case-param span {
    font-weight: 600;
    font-size: 1.0625rem;
}
.xy-case-comparison {
    margin-top: var(--xy-space-2xl);
    padding-top: var(--xy-space-xl);
    border-top: 1px solid var(--xy-color-border);
}
.xy-case-comparison h3 {
    font-size: 1.25rem;
    margin-bottom: var(--xy-space-lg);
}
.xy-case-comparison__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--xy-space-lg);
}
.xy-case-comparison__item {
    position: relative;
    border-radius: var(--xy-radius-lg);
    overflow: hidden;
}
.xy-case-comparison__item img {
    width: 100%;
    aspect-ratio: 4/3;
    object-fit: cover;
}
.xy-badge {
    position: absolute;
    top: var(--xy-space-md);
    left: var(--xy-space-md);
    padding: 4px 12px;
    border-radius: var(--xy-radius-full);
    font-size: 0.8125rem;
    font-weight: 600;
    color: #fff;
}
.xy-badge--before { background: var(--xy-color-text-light); }
.xy-badge--after { background: var(--xy-color-success); }

.xy-post-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.xy-post-nav__prev a,
.xy-post-nav__next a {
    font-weight: 500;
}

/* ============================================================
 * Breadcrumb
 * ============================================================ */
.xy-breadcrumb {
    margin-top: var(--xy-space-sm);
    font-size: 0.875rem;
    color: var(--xy-color-text-light);
}
.xy-breadcrumb a { color: var(--xy-color-text-light); }
.xy-breadcrumb a:hover { color: var(--xy-color-primary); }
.xy-breadcrumb__sep { margin: 0 var(--xy-space-sm); }
.xy-breadcrumb__current { color: var(--xy-color-text); font-weight: 500; }

/* ============================================================
 * Page Header
 * ============================================================ */
.xy-page-header {
    background: linear-gradient(135deg, var(--xy-color-bg-dark), #1e3a5f);
    color: var(--xy-color-white);
    padding: calc(var(--xy-header-height) + var(--xy-space-2xl)) 0 var(--xy-space-2xl);
    text-align: center;
}
.xy-page-header--wuheng {
    background: linear-gradient(135deg, #0c4a6e, #1e3a5f);
}
.xy-page-header--commercial {
    background: linear-gradient(135deg, #1a1a2e, #16213e);
}
.xy-page-title {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
    font-weight: 800;
    margin-bottom: var(--xy-space-sm);
}
.xy-page-desc {
    font-size: 1.125rem;
    opacity: .8;
    margin-bottom: var(--xy-space-sm);
}
.xy-case-meta {
    display: flex;
    gap: var(--xy-space-sm);
    justify-content: center;
    flex-wrap: wrap;
}
.xy-tag {
    display: inline-block;
    padding: 2px 12px;
    background: rgba(255,255,255,.15);
    border-radius: var(--xy-radius-full);
    font-size: 0.8125rem;
}

/* ============================================================
 * Content (WYSIWYG)
 * ============================================================ */
.xy-content h2 { font-size: 1.5rem; font-weight: 700; margin: 1.5em 0 .5em; }
.xy-content h3 { font-size: 1.25rem; font-weight: 600; margin: 1.2em 0 .4em; }
.xy-content p { margin-bottom: 1em; line-height: 1.8; }
.xy-content img { border-radius: var(--xy-radius-md); margin: var(--xy-space-lg) 0; }
.xy-content ul, .xy-content ol { margin: 0 0 1em 1.5em; }
.xy-content ul { list-style: disc; }
.xy-content ol { list-style: decimal; }
.xy-content li { margin-bottom: .3em; }
.xy-content blockquote {
    border-left: 4px solid var(--xy-color-primary);
    padding: var(--xy-space-md) var(--xy-space-lg);
    margin: var(--xy-space-lg) 0;
    background: var(--xy-color-primary-light);
    border-radius: 0 var(--xy-radius-md) var(--xy-radius-md) 0;
}

/* ============================================================
 * Partners
 * ============================================================ */
.xy-partners__grid {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--xy-space-xl);
    flex-wrap: wrap;
}
.xy-partners__item {
    padding: var(--xy-space-md);
    opacity: .7;
    transition: opacity var(--xy-transition-fast);
}
.xy-partners__item:hover { opacity: 1; }
.xy-partners__item img { height: 48px; width: auto; }

/* ============================================================
 * Advantage / Promise Grid (shared)
 * ============================================================ */
.xy-advantage-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--xy-space-lg);
}
.xy-advantage-item {
    padding: var(--xy-space-lg);
    border-radius: var(--xy-radius-lg);
    background: var(--xy-color-white);
    border: 1px solid var(--xy-color-border);
    text-align: center;
}
.xy-advantage-item h4 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: var(--xy-space-sm);
}
.xy-advantage-item p {
    font-size: 0.9375rem;
    color: var(--xy-color-text-light);
}

/* ============================================================
 * Pagination
 * ============================================================ */
.xy-pagination { margin-top: var(--xy-space-xl); text-align: center; }
.xy-pagination__list { display: inline-flex; gap: var(--xy-space-xs); }
.xy-pagination__item a,
.xy-pagination__item span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 var(--xy-space-sm);
    border-radius: var(--xy-radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--xy-transition-fast);
}
.xy-pagination__item a {
    background: var(--xy-color-white);
    border: 1px solid var(--xy-color-border);
    color: var(--xy-color-text);
}
.xy-pagination__item a:hover {
    border-color: var(--xy-color-primary);
    color: var(--xy-color-primary);
}
.xy-pagination__item.is-active span {
    background: var(--xy-color-primary);
    color: #fff;
    border-color: var(--xy-color-primary);
}

/* ============================================================
 * Back to Top
 * ============================================================ */
.xy-back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: none;
    background: var(--xy-color-primary);
    color: #fff;
    cursor: pointer;
    box-shadow: var(--xy-shadow-md);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--xy-transition);
    z-index: 999;
}
.xy-back-to-top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.xy-back-to-top:hover {
    background: var(--xy-color-primary-hover);
    transform: translateY(-2px);
}

/* ============================================================
 * News Grid (Blog)
 * ============================================================ */
.xy-news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--xy-space-xl);
}
.xy-news-card {
    border-radius: var(--xy-radius-lg);
    overflow: hidden;
    background: var(--xy-color-white);
    border: 1px solid var(--xy-color-border);
    transition: all var(--xy-transition);
}
.xy-news-card:hover {
    box-shadow: var(--xy-shadow-lg);
    transform: translateY(-2px);
}
.xy-news-card__image {
    display: block;
    aspect-ratio: 16/9;
    overflow: hidden;
}
.xy-news-card__image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .5s ease;
}
.xy-news-card:hover .xy-news-card__image img { transform: scale(1.05); }
.xy-news-card__body { padding: var(--xy-space-md); }
.xy-news-card__date {
    font-size: 0.8125rem;
    color: var(--xy-color-text-muted);
}
.xy-news-card__title {
    font-size: 1.0625rem;
    margin-top: var(--xy-space-xs);
}
.xy-news-card__title a { color: var(--xy-color-text); }
.xy-news-card__title a:hover { color: var(--xy-color-primary); }
.xy-news-card__excerpt {
    font-size: 0.875rem;
    color: var(--xy-color-text-light);
    margin-top: var(--xy-space-sm);
}

/* ============================================================
 * Empty State
 * ============================================================ */
.xy-empty {
    text-align: center;
    padding: var(--xy-space-3xl);
    color: var(--xy-color-text-light);
    font-size: 1.125rem;
}

/* ============================================================
 * Responsive Visibility Utilities
 * ============================================================ */
.xy-desktop-only { display: block; }
.xy-mobile-only { display: none; }

@media (max-width: 768px) {
    .xy-desktop-only { display: none !important; }
    .xy-mobile-only { display: block !important; }
}

/* ============================================================
 * Animations
 * ============================================================ */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}
.animate-fadeInUp {
    animation: fadeInUp .8s ease forwards;
}
.animate-delay-1 { animation-delay: .2s; opacity: 0; }
.animate-delay-2 { animation-delay: .4s; opacity: 0; }

/* Scroll-triggered animation (will be activated by JS) */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(20px);
    transition: all .6s ease;
}
.animate-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================================
 * RESPONSIVE
 * ============================================================ */

/* Tablet (≤1024px) */
@media (max-width: 1024px) {
    .xy-product-detail-layout { grid-template-columns: 1fr; }
    .xy-product-directory { position: static; }
    .xy-official-products__grid { grid-template-columns: repeat(2, 1fr); }
    :root {
        --xy-container-max: 960px;
    }

    /* Navigation - switch to hamburger menu */
    .xy-nav {
        position: fixed;
        top: var(--xy-header-height);
        left: 0;
        right: 0;
        bottom: 0;
        background: var(--xy-color-white);
        flex-direction: column;
        justify-content: flex-start;
        padding: var(--xy-space-xl);
        transform: translateX(100%);
        transition: transform .3s ease;
        z-index: 999;
    }
    .xy-nav.is-open { transform: translateX(0); }
    .xy-nav__menu {
        flex-direction: column;
        gap: var(--xy-space-xs);
    }
    .xy-nav__menu a {
        font-size: 1.0625rem;
        padding: var(--xy-space-md);
    }
    .xy-nav__menu .sub-menu,
    .xy-nav__menu .sub-menu .sub-menu {
        position: static;
        display: none;
        min-width: 0;
        margin-left: var(--xy-space-md);
        padding: 0 0 0 var(--xy-space-sm);
        border: 0;
        border-left: 2px solid var(--xy-color-border);
        border-radius: 0;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        transform: none;
    }
    .xy-nav__menu .menu-item.is-submenu-open > .sub-menu { display: block; }
    .xy-hamburger { display: flex; }

    /* Grid adjustments */
    .xy-business__grid,
    .xy-brand__grid,
    .xy-tech-grid,
    .xy-value-grid,
    .xy-news-grid,
    .xy-case-grid { grid-template-columns: repeat(2, 1fr); }

    .xy-wuheng-grid,
    .xy-pain-grid,
    .xy-scenario-grid { grid-template-columns: repeat(3, 1fr); }

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

    .xy-footer__grid { grid-template-columns: 1fr 1fr; }

    .xy-contact-layout { grid-template-columns: 1fr; }
    .xy-about-intro { grid-template-columns: 1fr; }
    .xy-product-grid { grid-template-columns: 1fr; }
    .xy-tech-principle { flex-direction: column; align-items: center; }
    .xy-tech-principle__arrow { transform: rotate(90deg); }
}

/* Mobile (≤768px) */
@media (max-width: 768px) {
    :root {
        --xy-space-4xl: 56px;
        --xy-space-3xl: 40px;
    }

    .xy-header__actions .xy-btn--cta { display: none; }
    .xy-section__title { font-size: 1.5rem; }
    .xy-hero__title { font-size: 1.75rem; }

    /* All grids → single column */
    .xy-business__grid,
    .xy-brand__grid,
    .xy-tech-grid,
    .xy-value-grid,
    .xy-news-grid,
    .xy-case-grid,
    .xy-wuheng-grid,
    .xy-pain-grid,
    .xy-scenario-grid,
    .xy-promise-grid,
    .xy-advantage-grid,
    .xy-cert-grid,
    .xy-product-grid { grid-template-columns: 1fr; }

    .xy-footer__grid { grid-template-columns: 1fr; }
    .xy-footer__bottom { flex-direction: column; gap: var(--xy-space-sm); text-align: center; }

    .xy-case-params { flex-direction: column; gap: var(--xy-space-md); }
    .xy-case-comparison__grid { grid-template-columns: 1fr; }
    .xy-post-nav { flex-direction: column; gap: var(--xy-space-md); }

    .xy-hero__actions { flex-direction: column; align-items: center; }
    .xy-cta-card__actions { flex-direction: column; align-items: center; }

    .xy-form__grid { grid-template-columns: 1fr; }

    .xy-back-to-top { bottom: 80px; right: 16px; }

    /* Mobile Bottom Bar spacer */
    body { padding-bottom: 80px; }
}

/* ============================================================
 * Navigation Overlay (Mobile)
 * ============================================================ */
.xy-nav-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.5);
    z-index: 998;
    opacity: 0;
    transition: opacity 0.3s ease;
}
.xy-nav-overlay.is-active {
    display: block;
    opacity: 1;
}

/* ============================================================
 * Mobile Bottom Action Bar
 * ============================================================ */
.xy-mobile-bar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 997;
    background: rgba(255,255,255,.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--xy-color-border);
    padding: 8px 16px;
    padding-bottom: max(8px, env(safe-area-inset-bottom));
    box-shadow: 0 -4px 12px rgba(0,0,0,.06);
}
@media (max-width: 768px) {
    .xy-mobile-bar { display: flex; }
}
.xy-mobile-bar__inner {
    display: flex;
    gap: 10px;
    width: 100%;
    max-width: 500px;
    margin: 0 auto;
}
.xy-mobile-bar__btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 12px 16px;
    border: none;
    border-radius: var(--xy-radius-md);
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: all var(--xy-transition-fast);
    min-height: 48px;
}
.xy-mobile-bar__btn--phone {
    background: var(--xy-color-primary);
    color: #fff;
}
.xy-mobile-bar__btn--phone:hover,
.xy-mobile-bar__btn--phone:active {
    background: var(--xy-color-primary-hover);
    color: #fff;
}
.xy-mobile-bar__btn--wechat {
    background: var(--xy-color-accent);
    color: #fff;
}
.xy-mobile-bar__btn--wechat:hover,
.xy-mobile-bar__btn--wechat:active {
    background: var(--xy-color-accent-hover);
    color: #fff;
}
.xy-mobile-bar__btn svg {
    flex-shrink: 0;
}

/* ============================================================
 * Touch-Friendly Enhancements
 * ============================================================ */
@media (max-width: 768px) {
    /* Min touch target 44px */
    .xy-nav__menu a {
        min-height: 48px;
        display: flex;
        align-items: center;
        padding: 12px 16px;
    }
    .xy-btn {
        min-height: 44px;
    }
    .xy-pagination__item a,
    .xy-pagination__item span {
        min-width: 44px;
        min-height: 44px;
    }
    .xy-footer__menu a {
        display: inline-block;
        padding: 4px 0;
        min-height: 36px;
    }

    /* Prevent iOS zoom on input focus */
    .xy-form__field input,
    .xy-form__field select,
    .xy-form__field textarea {
        font-size: 16px !important;
    }

    /* Spacing between stacked cards */
    .xy-brand__card + .xy-brand__card,
    .xy-product-card + .xy-product-card,
    .xy-case-card + .xy-case-card,
    .xy-news-card + .xy-news-card,
    .xy-wuheng-card + .xy-wuheng-card,
    .xy-pain-card + .xy-pain-card,
    .xy-scenario-card + .xy-scenario-card,
    .xy-value-card + .xy-value-card,
    .xy-promise-card + .xy-promise-card,
    .xy-tech-item + .xy-tech-item {
        margin-top: 4px;
    }
}

/* ============================================================
 * Hero Mobile Optimization
 * ============================================================ */
@media (max-width: 768px) {
    .xy-hero {
        min-height: 70vh;
        max-height: 100vh;
    }
    .xy-hero__title {
        font-size: 1.625rem;
        line-height: 1.25;
    }
    .xy-hero__subtitle {
        font-size: 0.9375rem;
        line-height: 1.5;
    }
    .xy-hero__actions {
        flex-direction: column;
        align-items: center;
        gap: 12px;
    }
    .xy-hero__actions .xy-btn {
        width: 100%;
        max-width: 280px;
    }
}

/* ============================================================
 * Safe Area for Notched Phones
 * ============================================================ */
@supports (padding-top: env(safe-area-inset-top)) {
    .xy-header {
        padding-top: env(safe-area-inset-top);
    }
    .xy-footer {
        padding-bottom: calc(var(--xy-space-xl) + env(safe-area-inset-bottom));
    }
}

/* ============================================================
 * 480px Small Phone Breakpoint
 * ============================================================ */
@media (max-width: 480px) {
    :root {
        --xy-space-4xl: 40px;
        --xy-space-3xl: 32px;
        --xy-space-2xl: 28px;
        --xy-space-xl: 20px;
        --xy-space-lg: 16px;
    }

    .xy-container {
        padding: 0 16px;
    }

    /* Smaller typography */
    .xy-section__title {
        font-size: 1.375rem;
    }
    .xy-section__subtitle {
        font-size: 0.9375rem;
    }
    .xy-hero__title {
        font-size: 1.5rem;
    }
    .xy-page-title {
        font-size: 1.5rem;
    }
    .xy-page-desc {
        font-size: 0.9375rem;
    }

    /* Tighter spacing */
    .xy-section {
        padding: var(--xy-space-3xl) 0;
    }
    .xy-hero__content {
        padding: calc(var(--xy-header-height) + 24px) 0 var(--xy-space-xl);
    }

    /* Full-width buttons */
    .xy-cta-card {
        padding: var(--xy-space-xl);
    }
    .xy-cta-card h2 {
        font-size: 1.375rem;
    }

    /* Smaller card padding */
    .xy-brand__card,
    .xy-tech-item,
    .xy-value-card,
    .xy-wuheng-card,
    .xy-pain-card,
    .xy-scenario-card {
        padding: var(--xy-space-lg);
    }

    /* QR code smaller */
    .xy-qrcode,
    .xy-qrcode-placeholder {
        width: 100px;
        height: 100px;
    }

    /* Map shorter */
    .xy-map-placeholder {
        aspect-ratio: 4/3;
    }
}

/* ============================================================
 * WeChat Browser Compatibility
 * ============================================================ */
/* WeChat removes backdrop-filter support in some versions */
@supports not ((-webkit-backdrop-filter: blur(12px)) or (backdrop-filter: blur(12px))) {
    .xy-header {
        background: rgba(255,255,255,.98);
    }
    .xy-mobile-bar {
        background: rgba(255,255,255,.98);
    }
}
/* 五恒+健康住宅专题页 */
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@media(max-width:960px){.xy-wh-five-grid{grid-template-columns:repeat(2,1fr)}.xy-wh-feature:last-child{grid-column:1/-1}.xy-wh-more__grid{grid-template-columns:1fr}.xy-wh-steps{grid-template-columns:repeat(3,1fr)}}
@media(max-width:640px){.xy-wh-hero{min-height:660px;background-position:62% center}.xy-wh-five-grid{grid-template-columns:1fr}.xy-wh-feature:last-child{grid-column:auto}.xy-wh-feature{min-height:390px}.xy-wh-control{min-height:690px;background-position:60% center}.xy-wh-stats{display:grid;grid-template-columns:1fr}.xy-wh-stats div{min-width:0}.xy-wh-steps{grid-template-columns:repeat(2,1fr)}}