/* =============================================
   贵州大驾光临地坪工程有限公司 - 官网样式
   工业风 | 稳重 | 大气 | 简洁
   ============================================= */

/* ========== CSS Variables ========== */
:root {
    /* 工业深色系 */
    --color-dark: #0d0d0d;
    --color-charcoal: #1a1a1a;
    --color-steel: #252525;
    --color-steel-light: #333333;
    --color-graphite: #3c3c3c;

    /* 灰色系 */
    --color-gray: #6b6b6b;
    --color-gray-light: #999999;
    --color-gray-mist: #cccccc;

    /* 背景色 */
    --color-bg: #f0f0f0;
    --color-bg-alt: #e8e8e8;
    --color-white: #ffffff;

    /* 工业橙 - 点缀色 */
    --color-accent: #ff6a00;
    --color-accent-light: #ff8c2e;
    --color-accent-dark: #e55a00;

    /* 文字色 */
    --color-text: #2a2a2a;
    --color-text-light: #666666;
    --color-text-inverse: #ffffff;

    /* 字体 */
    --font-heading: "Oswald", "Noto Sans SC", "Microsoft YaHei", sans-serif;
    --font-body: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", sans-serif;

    /* 过渡 */
    --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);

    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.16);
    --shadow-accent: 0 4px 20px rgba(255, 106, 0, 0.3);
}

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

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

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul {
    list-style: none;
}

/* ========== 通用容器 ========== */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
    position: relative;
}

.section-dark {
    background: var(--color-charcoal);
    color: var(--color-text-inverse);
}

.section-darker {
    background: var(--color-dark);
    color: var(--color-text-inverse);
}

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

/* 混凝土纹理背景 */
.texture-concrete {
    position: relative;
}

.texture-concrete::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.02) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 106, 0, 0.03) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(255, 255, 255, 0.01) 0%, transparent 50%);
    pointer-events: none;
}

/* ========== 标题样式 ========== */
.section-header {
    text-align: center;
    margin-bottom: 64px;
    position: relative;
}

.section-tag {
    display: inline-block;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 16px;
    position: relative;
    padding-left: 32px;
}

.section-tag::before {
    content: "";
    position: absolute;
    left: 0;
    top: 50%;
    width: 24px;
    height: 2px;
    background: var(--color-accent);
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.6rem;
    font-weight: 700;
    letter-spacing: 1px;
    line-height: 1.2;
    text-transform: none;
}

.section-dark .section-title {
    color: var(--color-white);
}

.section-light .section-title {
    color: var(--color-text);
}

.section-subtitle {
    font-size: 1rem;
    color: var(--color-gray-light);
    max-width: 640px;
    margin: 20px auto 0;
    line-height: 1.8;
}

.section-dark .section-subtitle {
    color: rgba(255, 255, 255, 0.6);
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 36px;
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 500;
    letter-spacing: 1px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    clip-path: polygon(0 0, 100% 0, 96% 100%, 0% 100%);
}

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

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

.btn-outline {
    background: transparent;
    color: var(--color-white);
    border: 2px solid rgba(255, 255, 255, 0.3);
    clip-path: polygon(0 0, 100% 0, 96% 100%, 0% 100%);
    padding: 12px 34px;
}

.btn-outline:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    background: rgba(255, 106, 0, 0.08);
}

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

.btn-dark:hover {
    background: var(--color-accent);
    transform: translateY(-2px);
}

/* ========== 导航栏 ========== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: var(--transition);
    padding: 18px 0;
}

.header.scrolled {
    background: rgba(13, 13, 13, 0.96);
    backdrop-filter: blur(12px);
    padding: 12px 0;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
}

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

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

.logo-mark {
    width: 48px;
    height: 48px;
    background: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    clip-path: polygon(10% 0, 100% 0, 90% 100%, 0% 100%);
    flex-shrink: 0;
}

.logo-mark span {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-white);
    letter-spacing: -1px;
}

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

.logo-text .name {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-white);
    letter-spacing: 1px;
}

.logo-text .sub {
    font-size: 0.72rem;
    color: var(--color-gray-light);
    letter-spacing: 2px;
    text-transform: uppercase;
}

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

.nav a {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
    padding: 8px 18px;
    position: relative;
    letter-spacing: 0.5px;
}

.nav a::after {
    content: "";
    position: absolute;
    bottom: 4px;
    left: 18px;
    right: 18px;
    height: 2px;
    background: var(--color-accent);
    transform: scaleX(0);
    transition: var(--transition);
    transform-origin: left;
}

.nav a:hover,
.nav a.active {
    color: var(--color-white);
}

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

.nav-cta {
    margin-left: 16px;
    padding: 10px 28px !important;
    background: var(--color-accent);
    color: var(--color-white) !important;
    clip-path: polygon(0 0, 100% 0, 94% 100%, 0% 100%);
}

.nav-cta::after {
    display: none;
}

.nav-cta:hover {
    background: var(--color-accent-dark);
}

/* 管理员入口（页脚隐蔽式） */
.admin-entry {
    color: rgba(255, 255, 255, 0.25);
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 0.8rem;
}

.admin-entry:hover {
    color: rgba(255, 255, 255, 0.5);
}

/* 移动端菜单按钮 */
.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
    z-index: 1001;
}

.menu-toggle span {
    width: 26px;
    height: 2px;
    background: var(--color-white);
    transition: var(--transition);
}

.menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

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

.menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ========== Hero 首屏 ========== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    overflow: hidden;
    background: var(--color-dark);
}

/* ========== Hero 幻灯片轮播 ========== */
.hero-slider {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    overflow: hidden;
}

.hero-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1.2s ease-in-out;
    z-index: 0;
}

.hero-slide.active {
    opacity: 1;
    z-index: 1;
}

.hero-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: scale(1.05);
    transition: transform 8s ease-out;
}

.hero-slide.active img {
    transform: scale(1.15);
}

.hero-slide-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg,
        rgba(13, 13, 13, 0.88) 0%,
        rgba(13, 13, 13, 0.65) 40%,
        rgba(13, 13, 13, 0.82) 100%);
}

.hero-slide-caption {
    position: absolute;
    bottom: 130px;
    right: 0;
    background: rgba(255, 107, 0, 0.9);
    padding: 16px 32px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    clip-path: polygon(20px 0, 100% 0, 100% 100%, 0 100%);
    z-index: 2;
    animation: slideInRight 0.8s ease-out;
}

.hero-slide.active .hero-slide-caption {
    animation: slideInRight 0.8s ease-out 0.3s both;
}

.hero-slide-tag {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: 1px;
}

.hero-slide-desc {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.9);
    letter-spacing: 0.5px;
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(60px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 轮播箭头 */
.slider-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    background: rgba(13, 13, 13, 0.4);
    backdrop-filter: blur(4px);
    border-radius: 50%;
    cursor: pointer;
    z-index: 3;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.slider-arrow:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
    transform: translateY(-50%) scale(1.1);
}

.slider-arrow svg {
    width: 22px;
    height: 22px;
    fill: #fff;
}

.slider-prev { left: 30px; }
.slider-next { right: 30px; }

/* 轮播指示点 */
.slider-dots {
    position: absolute;
    bottom: 110px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 12px;
    z-index: 3;
}

.slider-dot {
    width: 36px;
    height: 4px;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.slider-dot.active {
    background: rgba(255, 255, 255, 0.3);
}

.slider-dot.active::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 100%;
    background: var(--color-accent);
    animation: dotProgress 5s linear;
}

@keyframes dotProgress {
    from { width: 0; }
    to { width: 100%; }
}

/* 响应式调整 */
@media (max-width: 768px) {
    .hero-slide-caption {
        bottom: 100px;
        padding: 12px 20px;
    }
    .hero-slide-tag { font-size: 1rem; }
    .hero-slide-desc { font-size: 0.75rem; }
    .slider-arrow { width: 38px; height: 38px; }
    .slider-prev { left: 12px; }
    .slider-next { right: 12px; }
    .slider-dots { bottom: 90px; gap: 8px; }
    .slider-dot { width: 24px; }
}

@media (max-width: 480px) {
    .hero-slide-caption { display: none; }
    .slider-dots { bottom: 80px; }
}

/* 工业网格线条装饰 */
.hero-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
    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: 80px 80px;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 820px;
    padding-top: 80px;
}

.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    letter-spacing: 4px;
    text-transform: uppercase;
    color: var(--color-accent);
    margin-bottom: 28px;
}

.hero-tag::before {
    content: "";
    width: 40px;
    height: 2px;
    background: var(--color-accent);
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 4rem;
    font-weight: 700;
    color: var(--color-white);
    line-height: 1.1;
    letter-spacing: 2px;
    margin-bottom: 24px;
}

.hero-title .accent {
    color: var(--color-accent);
}

.hero-subtitle {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.8;
    margin-bottom: 40px;
    max-width: 580px;
}

.hero-actions {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.hero-stats {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    z-index: 2;
    background: rgba(13, 13, 13, 0.8);
    backdrop-filter: blur(8px);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 28px 0;
}

.hero-stats .container {
    display: flex;
    justify-content: space-around;
    gap: 20px;
}

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

.hero-stat .num {
    font-family: var(--font-heading);
    font-size: 2.4rem;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
}

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

.hero-stat .label {
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 8px;
    letter-spacing: 1px;
}

/* 滚动提示 */
.scroll-hint {
    position: absolute;
    bottom: 140px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.4);
    font-size: 0.75rem;
    letter-spacing: 2px;
    animation: bounce 2s infinite;
}

.scroll-hint .line {
    width: 1px;
    height: 32px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-10px); }
}

/* ========== 关于我们 ========== */
.about {
    padding: 120px 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-visual {
    position: relative;
}

.about-img-main {
    width: 100%;
    height: 520px;
    object-fit: cover;
    filter: brightness(0.85) contrast(1.05);
}

.about-img-overlay {
    position: absolute;
    bottom: -30px;
    right: -30px;
    width: 200px;
    background: var(--color-accent);
    padding: 32px;
    text-align: center;
}

.about-img-overlay .year {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-white);
    line-height: 1;
}

.about-img-overlay .text {
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.85);
    margin-top: 8px;
}

.about-content .section-tag {
    padding-left: 32px;
}

.about-content .section-title {
    text-align: left;
    margin-bottom: 28px;
    /* 该标题已升级为 H1（页面唯一 H1，语义化优化）；显式保持原 h2 默认上边距，视觉零变化 */
    margin-top: 0.83em;
}

.about-text {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.9;
    margin-bottom: 24px;
    font-size: 0.95rem;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin: 32px 0;
}

.about-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.8);
}

.about-feature .check {
    width: 24px;
    height: 24px;
    background: var(--color-accent);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    clip-path: polygon(20% 0, 100% 0, 80% 100%, 0% 100%);
}

.about-feature .check svg {
    width: 14px;
    height: 14px;
    fill: var(--color-white);
}

/* ========== 产品中心 ========== */
.products {
    padding: 120px 0;
    background: var(--color-bg);
}

.product-filters {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-bottom: 56px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 10px 28px;
    font-size: 0.88rem;
    font-family: var(--font-body);
    background: transparent;
    border: 1.5px solid #ddd;
    color: var(--color-text-light);
    cursor: pointer;
    transition: var(--transition);
    letter-spacing: 0.5px;
}

.filter-btn:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.filter-btn.active {
    background: var(--color-charcoal);
    border-color: var(--color-charcoal);
    color: var(--color-white);
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.product-card {
    background: var(--color-white);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    border-top: 3px solid transparent;
}

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

.product-img {
    position: relative;
    overflow: hidden;
    height: 260px;
}

.product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

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

.product-img::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, transparent 50%, rgba(0, 0, 0, 0.4) 100%);
}

.product-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    z-index: 2;
    background: var(--color-accent);
    color: var(--color-white);
    font-size: 0.72rem;
    padding: 4px 14px;
    letter-spacing: 1px;
    font-weight: 500;
}

.product-body {
    padding: 28px 24px;
}

.product-body h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 10px;
}

.product-body p {
    font-size: 0.85rem;
    color: var(--color-text-light);
    line-height: 1.7;
    margin-bottom: 16px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-tags {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.product-tags span {
    font-size: 0.72rem;
    color: var(--color-gray);
    background: var(--color-bg-alt);
    padding: 3px 10px;
    border-radius: 2px;
}

.product-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    color: var(--color-accent);
    letter-spacing: 1px;
    transition: var(--transition);
}

.product-link:hover {
    gap: 12px;
}

.product-link svg {
    width: 16px;
    height: 16px;
    fill: var(--color-accent);
}

/* ========== 核心优势 ========== */
.advantages {
    padding: 120px 0;
    background: var(--color-charcoal);
    position: relative;
    overflow: hidden;
}

/* 装饰线条 */
.advantages::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
}

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

.advantage-card {
    text-align: center;
    padding: 48px 28px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.06);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.advantage-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--color-accent);
    transform: scaleX(0);
    transition: var(--transition);
    transform-origin: left;
}

.advantage-card:hover {
    background: rgba(255, 106, 0, 0.06);
    border-color: rgba(255, 106, 0, 0.2);
    transform: translateY(-6px);
}

.advantage-card:hover::before {
    transform: scaleX(1);
}

.advantage-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 106, 0, 0.1);
    border: 1px solid rgba(255, 106, 0, 0.2);
    transition: var(--transition);
}

.advantage-card:hover .advantage-icon {
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.advantage-icon svg {
    width: 30px;
    height: 30px;
    fill: var(--color-accent);
    transition: var(--transition);
}

.advantage-card:hover .advantage-icon svg {
    fill: var(--color-white);
}

.advantage-card h3 {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 12px;
}

.advantage-card p {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
    line-height: 1.7;
}

/* ========== 工程案例 ========== */
.cases {
    padding: 120px 0;
    background: var(--color-bg);
}

.case-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.case-card {
    position: relative;
    overflow: hidden;
    height: 360px;
    cursor: pointer;
    group: hover;
}

.case-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
    filter: brightness(0.9);
}

.case-card:hover img {
    transform: scale(1.08);
    filter: brightness(0.6);
}

.case-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    padding: 32px 28px;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9), transparent);
    transition: var(--transition);
}

.case-card:hover .case-overlay {
    background: linear-gradient(to top, rgba(0, 0, 0, 0.9) 30%, rgba(255, 106, 0, 0.2));
}

.case-category {
    display: inline-block;
    font-size: 0.72rem;
    color: var(--color-accent);
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-bottom: 8px;
    font-family: var(--font-heading);
}

.case-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 4px;
}

.case-desc {
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.6);
    max-height: 0;
    overflow: hidden;
    transition: var(--transition);
}

.case-card:hover .case-desc {
    max-height: 60px;
    margin-top: 8px;
}

/* ========== 施工流程 ========== */
.process {
    padding: 120px 0;
    background: var(--color-dark);
    position: relative;
    overflow: hidden;
}

.process-timeline {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0;
    position: relative;
    margin-top: 20px;
}

/* 连接线 */
.process-timeline::before {
    content: "";
    position: absolute;
    top: 36px;
    left: 10%;
    right: 10%;
    height: 2px;
    background: rgba(255, 255, 255, 0.1);
}

.process-step {
    text-align: center;
    padding: 0 16px;
    position: relative;
}

.process-num {
    width: 72px;
    height: 72px;
    margin: 0 auto 24px;
    background: var(--color-charcoal);
    border: 2px solid rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-white);
    transition: var(--transition);
    position: relative;
    z-index: 1;
}

.process-step:hover .process-num {
    background: var(--color-accent);
    border-color: var(--color-accent);
    transform: scale(1.1);
    box-shadow: var(--shadow-accent);
}

.process-step h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 10px;
}

.process-step p {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.4);
    line-height: 1.6;
}

/* ========== 联系我们 ========== */
.contact {
    padding: 120px 0;
    background: var(--color-bg);
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-info .section-title {
    text-align: left;
    margin-bottom: 24px;
}

.contact-desc {
    color: var(--color-text-light);
    line-height: 1.9;
    margin-bottom: 40px;
    font-size: 0.95rem;
}

.contact-items {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.contact-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.contact-item-icon {
    width: 48px;
    height: 48px;
    background: var(--color-charcoal);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    clip-path: polygon(15% 0, 100% 0, 85% 100%, 0% 100%);
}

.contact-item-icon svg {
    width: 22px;
    height: 22px;
    fill: var(--color-accent);
}

.contact-item .label {
    font-size: 0.78rem;
    color: var(--color-gray);
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.contact-item .value {
    font-size: 1rem;
    color: var(--color-text);
    font-weight: 500;
}

/* 表单 */
.contact-form {
    background: var(--color-white);
    padding: 48px 40px;
    box-shadow: var(--shadow-md);
    border-top: 4px solid var(--color-accent);
}

.contact-form h3 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 32px;
}

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

.form-group label {
    display: block;
    font-size: 0.82rem;
    color: var(--color-text-light);
    margin-bottom: 8px;
    letter-spacing: 0.5px;
}

.form-group label .req {
    color: var(--color-accent);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1.5px solid #e0e0e0;
    background: var(--color-bg);
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: var(--color-text);
    transition: var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-accent);
    background: var(--color-white);
}

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

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

.contact-form .btn {
    width: 100%;
    margin-top: 8px;
}

.form-success {
    display: none;
    text-align: center;
    padding: 40px 20px;
}

.form-success.show {
    display: block;
}

.form-success .icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: var(--color-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.form-success .icon svg {
    width: 32px;
    height: 32px;
    fill: var(--color-white);
}

.form-success h4 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    color: var(--color-text);
    margin-bottom: 8px;
}

.form-success p {
    color: var(--color-text-light);
    font-size: 0.9rem;
}

/* ========== 页脚 ========== */
.footer {
    background: var(--color-dark);
    color: rgba(255, 255, 255, 0.5);
    padding: 72px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 56px;
}

.footer-brand .logo {
    margin-bottom: 20px;
}

.footer-brand p {
    font-size: 0.85rem;
    line-height: 1.8;
    margin-bottom: 24px;
}

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

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.06);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

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

.footer-social svg {
    width: 18px;
    height: 18px;
    fill: rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

.footer-social a:hover svg {
    fill: var(--color-white);
}

.footer-col h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 24px;
    position: relative;
    padding-bottom: 12px;
}

.footer-col h4::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 32px;
    height: 2px;
    background: var(--color-accent);
}

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

.footer-col ul li a {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.5);
    transition: var(--transition);
}

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

.footer-contact-item {
    display: flex;
    gap: 10px;
    margin-bottom: 14px;
    font-size: 0.85rem;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.06);
    padding: 24px 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.8rem;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.4);
}

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

/* ========== 返回顶部 ========== */
.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    background: var(--color-charcoal);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.back-to-top svg {
    width: 20px;
    height: 20px;
    fill: var(--color-white);
}

/* ========== 浮动拨号按钮 ========== */
.float-call {
    position: fixed;
    bottom: 32px;
    left: 32px;
    width: 56px;
    height: 56px;
    background: var(--color-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
    box-shadow: 0 4px 20px rgba(255, 106, 0, 0.4);
    transition: var(--transition);
    animation: pulse-ring 2s infinite;
}

.float-call:hover {
    transform: scale(1.1);
    background: var(--color-accent-dark);
}

.float-call svg {
    width: 26px;
    height: 26px;
    fill: var(--color-white);
}

@keyframes pulse-ring {
    0% { box-shadow: 0 0 0 0 rgba(255, 106, 0, 0.5), 0 4px 20px rgba(255, 106, 0, 0.4); }
    70% { box-shadow: 0 0 0 16px rgba(255, 106, 0, 0), 0 4px 20px rgba(255, 106, 0, 0.4); }
    100% { box-shadow: 0 0 0 0 rgba(255, 106, 0, 0), 0 4px 20px rgba(255, 106, 0, 0.4); }
}

@media (max-width: 600px) {
    .float-call {
        bottom: 20px;
        left: 20px;
        width: 48px;
        height: 48px;
    }
    .float-call svg {
        width: 22px;
        height: 22px;
    }
}

/* ========== 滚动渐显动画 ========== */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }

/* ========== 响应式 ========== */
@media (max-width: 1100px) {
    .hero-title { font-size: 3.2rem; }
    .advantage-grid { grid-template-columns: repeat(2, 1fr); }
    .process-timeline { grid-template-columns: repeat(3, 1fr); gap: 32px 0; }
    .process-timeline::before { display: none; }
}

@media (max-width: 900px) {
    .nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 300px;
        height: 100vh;
        background: var(--color-dark);
        flex-direction: column;
        align-items: flex-start;
        padding: 100px 32px 32px;
        gap: 0;
        transition: right 0.4s ease;
        z-index: 999;
    }

    .nav.open {
        right: 0;
    }

    .nav a {
        width: 100%;
        padding: 16px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    }

    .nav a::after { display: none; }

    .nav-cta {
        margin: 16px 0 0;
        width: 100%;
        text-align: center;
    }

    .menu-toggle { display: flex; }

    .hero-title { font-size: 2.6rem; }
    .hero-subtitle { font-size: 1rem; }

    .about-grid,
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .about-visual { max-width: 500px; }

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

    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }

    .section-title { font-size: 2rem; }
}

@media (max-width: 600px) {
    .section { padding: 64px 0; }
    .products, .cases, .advantages, .contact, .process, .about { padding: 72px 0; }

    .hero-title { font-size: 2rem; }
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { width: 100%; }

    .hero-stats .container { flex-wrap: wrap; gap: 20px; }
    .hero-stat { flex: 1 1 40%; }
    .hero-stat .num { font-size: 1.8rem; }

    .about-features { grid-template-columns: 1fr; }

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

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

    .process-timeline {
        grid-template-columns: 1fr;
        gap: 32px;
    }

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

    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

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

    .contact-form { padding: 32px 24px; }

    .about-img-overlay {
        width: 140px;
        padding: 20px;
    }

    .about-img-overlay .year { font-size: 2.2rem; }

    .back-to-top {
        bottom: 20px;
        right: 20px;
        width: 40px;
        height: 40px;
    }
}

/* ========== 新闻中心 ========== */
.news-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.news-tab {
    padding: 8px 24px;
    border: 1px solid rgba(255, 255, 255, 0.15);
    background: transparent;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 0.5px;
}

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

.news-tab.active {
    background: var(--color-accent);
    border-color: var(--color-accent);
    color: #fff;
}

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

.news-card {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.08);
    overflow: hidden;
    transition: all 0.4s ease;
    cursor: pointer;
    display: flex;
    flex-direction: column;
}

.news-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.4);
}

.news-card-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
    position: relative;
    background: var(--color-dark);
}

.news-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

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

.news-card-category {
    position: absolute;
    top: 12px;
    left: 12px;
    padding: 4px 12px;
    background: var(--color-accent);
    color: #fff;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    z-index: 1;
}

.news-card-body {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.news-card-date {
    font-size: 0.78rem;
    color: rgba(255, 255, 255, 0.4);
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

.news-card-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: #fff;
    margin-bottom: 12px;
    line-height: 1.5;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card-summary {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.55);
    line-height: 1.7;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-card-link {
    margin-top: 16px;
    color: var(--color-accent);
    font-size: 0.82rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: gap 0.3s ease;
}

.news-card:hover .news-card-link { gap: 12px; }

/* ========== 新闻列表页（浅色背景）样式覆盖 ========== */
.section-light .news-tab {
    border: 1.5px solid #ddd;
    color: var(--color-text-light);
}
.section-light .news-tab.active {
    background: var(--color-charcoal);
    border-color: var(--color-charcoal);
    color: var(--color-white);
}
.section-light .news-card {
    background: var(--color-white);
    border: 1px solid #eee;
    box-shadow: var(--shadow-sm);
}
.section-light .news-card:hover {
    box-shadow: var(--shadow-lg);
    border-color: var(--color-accent);
}
.section-light .news-card-date {
    color: var(--color-text-light);
}
.section-light .news-card-title {
    color: var(--color-text);
}
.section-light .news-card-summary {
    color: var(--color-text-light);
}
.section-light .news-empty {
    color: var(--color-text-light);
}

.news-empty {
    text-align: center;
    padding: 60px 0;
    color: rgba(255, 255, 255, 0.3);
    font-size: 1rem;
}

@media (max-width: 968px) {
    .news-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
    .news-grid { grid-template-columns: 1fr; }
    .news-tabs { gap: 8px; }
    .news-tab { padding: 6px 16px; font-size: 0.82rem; }
}

/* =============================================
   新增：面包屑 / 友情链接 / 栏目页 / 详情页
   ============================================= */

/* ========== 面包屑导航 ========== */
#breadcrumb {
    background: var(--color-white);
    border-bottom: 1px solid var(--color-bg-alt);
}
.breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    padding: 16px 0;
    font-size: 0.85rem;
}
.breadcrumb-link {
    color: var(--color-text-light);
    transition: var(--transition);
}
.breadcrumb-link:hover { color: var(--color-accent); }
.breadcrumb-sep {
    color: var(--color-gray-light);
    font-size: 0.78rem;
}
.breadcrumb-current {
    color: var(--color-text);
    font-weight: 600;
    max-width: 460px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ========== 友情链接板块 ========== */
.friend-links-section {
    background: var(--color-charcoal);
    padding: 28px 0;
}
.friend-links-box {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px 24px;
}
.friend-links-title {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 2px;
    color: var(--color-accent);
    white-space: nowrap;
}
.friend-links-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 24px;
}
.friend-links-list a {
    font-size: 0.82rem;
    color: rgba(255, 255, 255, 0.55);
    transition: var(--transition);
}
.friend-links-list a:hover { color: var(--color-accent); }

/* ========== a 标签卡片 display 修正 ========== */
a.case-card { display: block; color: inherit; }
a.news-card { color: inherit; text-decoration: none; }
a.product-card-link { display: block; color: inherit; text-decoration: none; }

/* 案例查看详情 */
.case-view {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    margin-top: 14px;
    color: var(--color-accent);
    font-size: 0.82rem;
    font-weight: 600;
    transition: gap 0.3s ease;
}
.case-card:hover .case-view { gap: 12px; }

/* ========== 栏目页 ========== */
.list-page .section-header { margin-bottom: 48px; }

/* ========== 详情页通用 ========== */
.detail-page { padding-top: 60px; }
.detail-notfound {
    text-align: center;
    padding: 80px 20px;
}
.detail-notfound h2 {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    margin-bottom: 16px;
}
.detail-notfound p { color: var(--color-text-light); margin-bottom: 28px; }

.detail-cat {
    display: inline-block;
    padding: 4px 14px;
    background: var(--color-accent);
    color: #fff;
    font-size: 0.78rem;
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 18px;
}
.detail-title {
    font-family: var(--font-heading);
    font-size: 2.1rem;
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-text);
    margin-bottom: 18px;
}
.detail-desc {
    font-size: 1rem;
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: 24px;
}
.detail-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 28px;
}
.detail-tags span {
    padding: 5px 14px;
    background: var(--color-bg-alt);
    font-size: 0.8rem;
    color: var(--color-text-light);
}

/* 产品详情顶部 */
.detail-top {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    margin-bottom: 60px;
}
.detail-gallery {
    position: relative;
    background: var(--color-white);
    overflow: hidden;
}
.detail-gallery img {
    width: 100%;
    height: 460px;
    object-fit: cover;
}
.detail-badge {
    position: absolute;
    top: 16px;
    left: 16px;
    padding: 5px 14px;
    background: var(--color-accent);
    color: #fff;
    font-size: 0.78rem;
    font-weight: 600;
    z-index: 1;
}
.detail-summary { padding-top: 8px; }
.detail-features { margin-bottom: 32px; }
.detail-features h3 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    margin-bottom: 16px;
    color: var(--color-text);
}
.detail-features ul { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.detail-features li {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.88rem;
    color: var(--color-text-light);
}
.detail-features li svg { flex-shrink: 0; }
.detail-actions { display: flex; gap: 14px; flex-wrap: wrap; }

/* 详情正文 */
.detail-body { max-width: 900px; }
.detail-section { margin-bottom: 48px; }
.detail-h2 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 24px;
    padding-left: 16px;
    border-left: 4px solid var(--color-accent);
}
.detail-article p {
    font-size: 0.95rem;
    color: var(--color-text-light);
    line-height: 2;
    margin-bottom: 18px;
}
.detail-apps {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}
.detail-apps span {
    padding: 8px 20px;
    background: var(--color-white);
    border: 1px solid var(--color-bg-alt);
    font-size: 0.85rem;
    color: var(--color-text);
    transition: var(--transition);
}
.detail-apps span:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}
.detail-specs {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-white);
}
.detail-specs th,
.detail-specs td {
    padding: 14px 20px;
    border-bottom: 1px solid var(--color-bg-alt);
    font-size: 0.9rem;
    text-align: left;
}
.detail-specs th {
    background: var(--color-bg);
    color: var(--color-text);
    font-weight: 600;
    width: 200px;
}
.detail-specs td { color: var(--color-text-light); }

/* 案例详情 */
.detail-case-banner { margin-bottom: 36px; overflow: hidden; }
.detail-case-banner img { width: 100%; height: 460px; object-fit: cover; }
.detail-case-head { margin-bottom: 48px; }
.detail-case-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 40px;
    align-items: start;
}
.detail-aside { position: sticky; top: 90px; }
.aside-box {
    background: var(--color-white);
    padding: 28px;
    margin-bottom: 20px;
}
.aside-box h3 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    margin-bottom: 18px;
    color: var(--color-text);
    padding-bottom: 12px;
    border-bottom: 2px solid var(--color-accent);
}
.aside-box .detail-specs { background: transparent; }
.aside-box .detail-specs th { background: transparent; width: auto; }
.aside-cta {
    background: var(--color-charcoal);
    color: #fff;
    padding: 28px;
    text-align: center;
}
.aside-cta p { font-size: 0.9rem; margin-bottom: 16px; color: rgba(255,255,255,0.8); }

/* 新闻详情 */
.news-detail { max-width: 860px; margin: 0 auto; }
.news-detail-head { text-align: center; margin-bottom: 32px; }
.news-detail-cat {
    display: inline-block;
    padding: 4px 14px;
    background: var(--color-accent);
    color: #fff;
    font-size: 0.78rem;
    font-weight: 600;
    margin-bottom: 18px;
}
.news-detail-title {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.4;
    margin-bottom: 16px;
}
.news-detail-meta {
    font-size: 0.85rem;
    color: var(--color-gray-light);
}
.news-detail-meta .sep { margin: 0 10px; }
.news-detail-cover { margin-bottom: 36px; }
.news-detail-cover img { width: 100%; max-height: 440px; object-fit: cover; }
.news-detail-body p {
    font-size: 1rem;
    color: var(--color-text-light);
    line-height: 2.1;
    margin-bottom: 22px;
}
.news-detail-footer { margin-top: 48px; text-align: center; }

/* 相关推荐 */
.related-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.related-card {
    display: block;
    background: var(--color-charcoal);
    overflow: hidden;
    transition: var(--transition);
    color: inherit;
    text-decoration: none;
}
.related-card:hover { transform: translateY(-6px); }
.related-img { height: 160px; overflow: hidden; }
.related-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.related-card:hover .related-img img { transform: scale(1.08); }
.related-name {
    padding: 14px 16px 4px;
    font-size: 0.92rem;
    font-weight: 600;
    color: #fff;
    line-height: 1.4;
}
.related-cat {
    padding: 0 16px 16px;
    font-size: 0.78rem;
    color: var(--color-accent);
}

/* ========== 响应式 ========== */
@media (max-width: 968px) {
    .detail-top { grid-template-columns: 1fr; gap: 28px; }
    .detail-gallery img { height: 320px; }
    .detail-case-layout { grid-template-columns: 1fr; }
    .detail-aside { position: static; }
    .related-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 640px) {
    .detail-title, .news-detail-title { font-size: 1.5rem; }
    .detail-features ul { grid-template-columns: 1fr; }
    .detail-specs th { width: 120px; }
    .related-grid { grid-template-columns: 1fr; }
    .friend-links-box { flex-direction: column; align-items: flex-start; }
}

/* ========== 正文内嵌图片 ========== */
.content-img {
    margin: 24px 0;
    text-align: center;
}
.content-img img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.12);
}
.content-img figcaption {
    margin-top: 10px;
    font-size: 0.85rem;
    color: var(--color-text-light, #777);
    line-height: 1.5;
}

/* ========== 后台正文图片插入工具条 ========== */
.content-toolbar {
    display: flex;
    gap: 8px;
    margin-bottom: 8px;
}
.content-tool-btn {
    padding: 5px 14px;
    font-size: 0.82rem;
    font-family: var(--font-body);
    color: #fff;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
}
.content-tool-btn:hover {
    background: var(--color-accent);
    border-color: var(--color-accent);
}

/* =============================================
   首页产品/案例 分页滑动展示
   ============================================= */
.hslider {
    position: relative;
    padding: 0 10px;
}

.hslider-viewport {
    overflow: hidden;
}

.hslider-track {
    display: flex;
    transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.hslider-page {
    min-width: 100%;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    padding: 8px 4px;
    box-sizing: border-box;
}

.hslider-page-case {
    gap: 24px;
}

.hslider-arrow {
    position: absolute;
    top: 38%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--color-white);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.08);
    cursor: pointer;
}

.hslider-arrow svg {
    width: 24px;
    height: 24px;
    fill: var(--color-accent);
}

.hslider-arrow:hover {
    background: var(--color-accent);
    box-shadow: 0 4px 16px rgba(255, 106, 0, 0.3);
}

.hslider-arrow:hover svg {
    fill: var(--color-white);
}

.hslider-prev {
    left: -22px;
}

.hslider-next {
    right: -22px;
}

.hslider-dots {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 28px;
}

.hslider-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #ccc;
    cursor: pointer;
    transition: all 0.3s ease;
}

.hslider-dot:hover {
    background: var(--color-accent-light);
}

.hslider-dot.active {
    background: var(--color-accent);
    width: 32px;
    border-radius: 5px;
}

/* 响应式 */
@media (max-width: 992px) {
    .hslider-page {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    .hslider-arrow {
        width: 38px;
        height: 38px;
    }
    .hslider-arrow svg {
        width: 20px;
        height: 20px;
    }
    .hslider-prev { left: -15px; }
    .hslider-next { right: -15px; }
}

@media (max-width: 600px) {
    .hslider-page {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    .hslider-arrow {
        width: 34px;
        height: 34px;
    }
    .hslider-arrow svg {
        width: 18px;
        height: 18px;
    }
    .hslider-prev { left: -8px; }
    .hslider-next { right: -8px; }
    .hslider-dots {
        margin-top: 20px;
    }
}

/* =============================================
   FAQ 常见问题模块（AI 收录 / GEO 优化新增）
   展示在产品详情页底部，与 JSON-LD FAQPage 共用同一数据源
   ============================================= */
.faq-section { max-width: 900px; }
.faq-list { border-top: 1px solid var(--color-bg-alt); }
.faq-item {
    background: var(--color-white);
    border: 1px solid var(--color-bg-alt);
    border-top: none;
    transition: var(--transition);
}
.faq-item:hover { border-color: var(--color-gray-mist); }
.faq-q {
    display: flex;
    align-items: center;
    gap: 14px;
    width: 100%;
    padding: 18px 22px;
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    font-family: var(--font-body);
    font-size: 0.98rem;
    font-weight: 500;
    color: var(--color-text);
    transition: var(--transition);
}
.faq-q:hover { background: var(--color-bg); }
.faq-q-icon {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    background: var(--color-accent);
    color: var(--color-white);
    font-family: var(--font-heading);
    font-size: 0.82rem;
    font-weight: 600;
}
.faq-q-text { flex: 1; line-height: 1.5; }
.faq-q-arrow {
    flex-shrink: 0;
    fill: var(--color-gray);
    transition: var(--transition);
}
.faq-item.open .faq-q-arrow { transform: rotate(180deg); fill: var(--color-accent); }
.faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}
.faq-item.open .faq-a { max-height: 600px; }
.faq-a p {
    padding: 0 22px 22px 66px;
    font-size: 0.92rem;
    line-height: 1.9;
    color: var(--color-text-light);
}
.faq-cta {
    margin-top: 28px;
    padding: 26px 28px;
    background: var(--color-charcoal);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}
.faq-cta p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.92rem;
    line-height: 1.7;
}
.faq-cta .btn { padding: 11px 26px; font-size: 0.85rem; }
@media (max-width: 640px) {
    .faq-a p { padding-left: 22px; }
    .faq-cta { flex-direction: column; align-items: flex-start; }
}