/* ==========================================================================
   广鼎机械 / GUANGDING - 全球工业风扇定制专家
   重新设计的主样式表 - 参考 Arburg 设计语言 + 品牌主色调
   ========================================================================== */

/* ---------- 0. 设计令牌 (Design Tokens) ---------- */
:root {
    /* 品牌主色 - 来自原网站 logo 的深绿 */
    --brand-primary:        #1F4D3E;     /* 主深绿 */
    --brand-primary-dark:   #143329;     /* 更深 */
    --brand-primary-light:  #2D6B55;     /* 浅一档 */
    --brand-accent:         #C9A961;     /* 高级感金色点缀 */
    --brand-accent-light:   #E5C97A;

    /* 中性色 */
    --color-ink:            #0E1A14;
    --color-text:           #2A2A2A;
    --color-muted:          #6B7280;
    --color-line:           #E5E7EB;
    --color-line-soft:      #F0F2F4;
    --color-bg:             #FFFFFF;
    --color-bg-soft:        #F7F8F9;
    --color-bg-alt:         #F1F5F3;
    --color-surface:        #F8FAF9;
    --color-bg-dark:        #0F1A14;
    --color-bg-darker:      #0A110D;

    /* 状态色 */
    --color-success:        #16A34A;
    --color-warning:        #F59E0B;

    /* 字体 */
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans CN",
                 "Noto Sans CJK SC", "Noto Sans CJK TC", "Noto Sans KR",
                 Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-display: "Inter", "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
    --font-mono: "JetBrains Mono", "SF Mono", "Menlo", monospace;

    /* 尺寸 */
    --container: 1320px;
    --header-h:  80px;
    --radius:    4px;
    --radius-lg: 8px;

    /* 阴影 */
    --shadow-sm: 0 1px 2px rgba(15, 26, 20, 0.04), 0 1px 3px rgba(15, 26, 20, 0.06);
    --shadow-md: 0 4px 12px rgba(15, 26, 20, 0.08), 0 2px 4px rgba(15, 26, 20, 0.04);
    --shadow-lg: 0 20px 40px -10px rgba(15, 26, 20, 0.18), 0 8px 16px rgba(15, 26, 20, 0.08);
    --shadow-xl: 0 30px 60px -15px rgba(15, 26, 20, 0.25);

    /* 过渡 */
    --ease: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- 1. Reset & 基础 ---------- */
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
[id] { scroll-margin-top: calc(var(--header-h) + 24px); }
body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}
img, svg, video { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: color 0.2s var(--ease); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; padding: 0; margin: 0; }
h1, h2, h3, h4, h5, h6 { margin: 0; font-weight: 600; line-height: 1.25; color: var(--color-ink); letter-spacing: -0.01em; }

/* ---------- 2. 通用工具类 ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; position: relative; }
.section--dark { background: var(--color-bg-dark); color: rgba(255,255,255,0.85); }
.section--soft { background: var(--color-bg-soft); }
.section--tight { padding: 64px 0; }
.eyebrow {
    display: inline-flex; align-items: center; gap: 8px;
    font-size: 13px; font-weight: 600; letter-spacing: 0.18em;
    text-transform: uppercase; color: var(--brand-primary);
}
.eyebrow::before { content: ''; width: 28px; height: 1.5px; background: var(--brand-primary); display: inline-block; }
.section--dark .eyebrow { color: var(--brand-accent); }
.section--dark .eyebrow::before { background: var(--brand-accent); }
.section-title {
    font-size: clamp(28px, 3.5vw, 44px);
    font-weight: 700;
    line-height: 1.2;
    margin: 16px 0 16px;
}
.section-subtitle { font-size: 17px; color: var(--color-muted); max-width: 720px; }
.section--dark .section-subtitle { color: rgba(255,255,255,0.65); }
.text-center { text-align: center; }
.mx-auto { margin-left: auto; margin-right: auto; }
.muted { color: var(--color-muted); }
.divider { width: 60px; height: 3px; background: var(--brand-primary); margin: 24px 0; }
.section--dark .divider { background: var(--brand-accent); }

/* ---------- 3. 按钮 ---------- */
.btn {
    display: inline-flex; align-items: center; gap: 10px;
    padding: 14px 32px;
    font-size: 14px; font-weight: 600;
    letter-spacing: 0.04em;
    border: 1.5px solid transparent;
    border-radius: 2px;
    cursor: pointer;
    transition: all 0.3s var(--ease);
    white-space: nowrap;
}
.btn--primary { background: var(--brand-primary); color: #fff; border-color: var(--brand-primary); }
.btn--primary:hover { background: var(--brand-primary-dark); border-color: var(--brand-primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn--outline { background: transparent; color: currentColor; border-color: currentColor; }
.btn--outline:hover { background: currentColor; color: var(--color-bg); }
.section--dark .btn--outline:hover { background: #fff; color: var(--color-ink); }
.btn--ghost { color: var(--color-ink); }
.btn--ghost:hover { color: var(--brand-primary); }
.btn .arrow { transition: transform 0.3s var(--ease); }
.btn:hover .arrow { transform: translateX(4px); }

/* ---------- 4. 顶部条 + 导航 ---------- */
.topbar {
    background: var(--color-bg-darker);
    color: rgba(255,255,255,0.7);
    font-size: 13px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}
.topbar__inner {
    display: flex; justify-content: space-between; align-items: center;
    height: 40px;
}
.topbar__left, .topbar__right { display: flex; align-items: center; gap: 24px; }
.topbar__item { display: inline-flex; align-items: center; gap: 6px; }
.topbar__item svg { width: 14px; height: 14px; }
.topbar a:hover { color: var(--brand-accent); }

.lang-switcher { position: relative; }
.lang-trigger {
    display: inline-flex; align-items: center; gap: 6px;
    color: rgba(255,255,255,0.7);
    cursor: pointer;
    font-size: 13px;
    padding: 4px 0;
}
.lang-trigger:hover { color: var(--brand-accent); }
.lang-menu {
    position: absolute; top: calc(100% + 10px); right: 0;
    background: #fff; color: var(--color-ink);
    min-width: 200px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: 8px 0;
    opacity: 0; visibility: hidden; transform: translateY(-8px);
    transition: all 0.25s var(--ease);
    z-index: 1000;
}
.lang-switcher.is-open .lang-menu { opacity: 1; visibility: visible; transform: translateY(0); }
.lang-menu__item {
    display: flex; align-items: center; justify-content: space-between;
    padding: 10px 18px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.2s;
}
.lang-menu__item:hover { background: var(--color-bg-soft); color: var(--brand-primary); }
.lang-menu__item.is-active { color: var(--brand-primary); font-weight: 600; }
.lang-menu__item.is-active::after { content: '✓'; color: var(--brand-primary); }

.header {
    position: sticky; top: 0; z-index: 100;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-line);
    transition: all 0.3s var(--ease);
}
.header.is-scrolled { box-shadow: var(--shadow-sm); }
.header__inner {
    display: flex; align-items: center; justify-content: space-between;
    height: var(--header-h);
}
.logo {
    display: flex; align-items: center; gap: 14px;
    color: var(--color-ink);
    text-decoration: none;
    flex-shrink: 0;
}
.logo__mark {
    width: 46px; height: 46px;
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}
.logo__mark img { width: 100%; height: 100%; object-fit: contain; }
.logo__text {
    display: flex; flex-direction: column;
    justify-content: center;
    white-space: nowrap;
}
.logo__title {
    font-size: 18px; font-weight: 700;
    color: var(--color-ink);
    letter-spacing: 0.04em;
    line-height: 1.2;
    white-space: nowrap;
}
.logo__sub {
    font-size: 11px; font-weight: 500;
    color: var(--brand-primary);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-top: 2px;
    white-space: nowrap;
}

.nav { display: flex; align-items: center; }
.nav__list { display: flex; align-items: center; gap: 4px; }
.nav__item { position: relative; }
.nav__link {
    display: flex; align-items: center; gap: 6px;
    padding: 28px 18px;
    font-size: 14px; font-weight: 500;
    color: var(--color-ink);
    transition: color 0.2s;
    position: relative;
}
.nav__link::after {
    content: ''; position: absolute;
    left: 18px; right: 18px; bottom: 24px;
    height: 2px; background: var(--brand-primary);
    transform: scaleX(0); transform-origin: left;
    transition: transform 0.3s var(--ease);
}
.nav__link:hover, .nav__item.is-active .nav__link { color: var(--brand-primary); }
.nav__link:hover::after, .nav__item.is-active .nav__link::after { transform: scaleX(1); }
.nav__caret { width: 10px; height: 10px; transition: transform 0.2s; }
.nav__item:hover .nav__caret { transform: rotate(180deg); }

.nav__sub {
    position: absolute; top: 100%; left: 0;
    min-width: 220px;
    background: #fff;
    border: 1px solid var(--color-line);
    border-top: 2px solid var(--brand-primary);
    box-shadow: var(--shadow-lg);
    padding: 8px 0;
    opacity: 0; visibility: hidden; transform: translateY(8px);
    transition: all 0.25s var(--ease);
    z-index: 200;
}
.nav__item:hover .nav__sub { opacity: 1; visibility: visible; transform: translateY(0); }
.nav__sub a {
    display: block;
    padding: 10px 20px;
    font-size: 13.5px; color: var(--color-ink);
    transition: all 0.2s;
}
.nav__sub a:hover { background: var(--color-bg-soft); color: var(--brand-primary); padding-left: 24px; }

.header__cta {
    display: flex; align-items: center; gap: 16px;
}
.header__phone {
    display: flex; align-items: center; gap: 8px;
    color: var(--brand-primary);
    font-weight: 600;
    white-space: nowrap;
}
.header__phone svg { width: 18px; height: 18px; }

.menu-toggle { display: none; }

/* ---------- 5. Hero 区域 ---------- */
.hero {
    position: relative;
    height: calc(100vh - 120px);
    min-height: 640px;
    max-height: 880px;
    overflow: hidden;
    background: var(--color-bg-darker);
}
.hero__slider { position: absolute; inset: 0; }
.hero__slide {
    position: absolute; inset: 0;
    opacity: 0; visibility: hidden;
    transition: opacity 0.8s var(--ease);
    display: flex; align-items: center;
}
.hero__slide.is-active { opacity: 1; visibility: visible; }
.hero__slide-bg {
    position: absolute; inset: 0;
    background-size: cover; background-position: center;
    transform: scale(1.05);
    transition: transform 8s linear;
}
.hero__slide.is-active .hero__slide-bg { transform: scale(1); }
.hero__slide::before {
    content: ''; position: absolute; inset: 0;
    background:
        linear-gradient(105deg, rgba(15,26,20,0.96) 0%, rgba(15,26,20,0.92) 30%, rgba(15,26,20,0.75) 55%, rgba(15,26,20,0.45) 80%, rgba(15,26,20,0.3) 100%),
        radial-gradient(ellipse at 30% 50%, rgba(31, 77, 62, 0.35) 0%, transparent 60%);
    z-index: 1;
}
.hero__slide::after {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(180deg, transparent 0%, transparent 50%, rgba(15,26,20,0.5) 100%);
    z-index: 1;
}
.hero__content {
    position: relative; z-index: 2;
    width: 100%;
    color: #fff;
}
.hero__inner {
    max-width: var(--container); margin: 0 auto; padding: 0 24px;
    display: flex; align-items: center; justify-content: space-between;
    width: 100%;
}
.hero__text { max-width: 720px; }
.hero__eyebrow {
    display: inline-flex; align-items: center; gap: 12px;
    color: var(--brand-accent);
    font-size: 13px; font-weight: 600; letter-spacing: 0.24em;
    text-transform: uppercase;
    margin-bottom: 24px;
    opacity: 0; transform: translateY(20px);
    animation: heroUp 0.8s var(--ease) 0.3s forwards;
}
.hero__eyebrow::before {
    content: ''; width: 40px; height: 1.5px; background: var(--brand-accent);
}
.hero__title {
    font-size: clamp(36px, 5.5vw, 68px);
    font-weight: 700;
    line-height: 1.05;
    color: #fff;
    margin: 0 0 24px;
    letter-spacing: -0.02em;
    opacity: 0; transform: translateY(30px);
    animation: heroUp 0.9s var(--ease) 0.5s forwards;
}
.hero__title em {
    font-style: normal;
    color: var(--brand-accent);
    position: relative;
}
.hero__desc {
    font-size: clamp(15px, 1.4vw, 18px);
    line-height: 1.7;
    color: rgba(255,255,255,0.85);
    margin: 0 0 36px;
    max-width: 580px;
    opacity: 0; transform: translateY(30px);
    animation: heroUp 0.9s var(--ease) 0.7s forwards;
}
.hero__actions {
    display: flex; gap: 16px; flex-wrap: wrap;
    opacity: 0; transform: translateY(30px);
    animation: heroUp 0.9s var(--ease) 0.9s forwards;
}
.hero__actions .btn--outline { color: #fff; border-color: rgba(255,255,255,0.5); }
.hero__actions .btn--outline:hover { background: #fff; color: var(--color-ink); border-color: #fff; }

.hero__visual {
    width: 380px; max-width: 40%;
    opacity: 0; transform: translateX(40px);
    animation: heroRight 1s var(--ease) 0.6s forwards;
}

@keyframes heroUp { to { opacity: 1; transform: translateY(0); } }
@keyframes heroRight { to { opacity: 1; transform: translateX(0); } }

.hero__nav {
    position: absolute; bottom: 40px; right: 40px;
    display: flex; gap: 12px;
    z-index: 10;
}
.hero__dot {
    width: 40px; height: 3px;
    background: rgba(255,255,255,0.3);
    cursor: pointer;
    transition: all 0.3s;
}
.hero__dot.is-active { background: var(--brand-accent); width: 60px; }

.hero__arrow {
    position: absolute; top: 50%;
    transform: translateY(-50%);
    width: 56px; height: 56px;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: #fff;
    cursor: pointer;
    z-index: 10;
    transition: all 0.3s;
    backdrop-filter: blur(8px);
}
.hero__arrow:hover { background: var(--brand-primary); border-color: var(--brand-primary); }
.hero__arrow--prev { left: 24px; }
.hero__arrow--next { right: 24px; }

.hero__scroll {
    position: absolute; bottom: 40px; left: 50%;
    transform: translateX(-50%);
    color: rgba(255,255,255,0.6);
    font-size: 11px; letter-spacing: 0.3em; text-transform: uppercase;
    display: flex; flex-direction: column; align-items: center; gap: 8px;
    z-index: 5;
    animation: bounce 2.4s var(--ease) infinite;
}
@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* ---------- 6. 公司实力数字板块 ---------- */
.stats {
    background: #fff;
    padding: 80px 0;
    border-bottom: 1px solid var(--color-line);
}
.stats__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: var(--color-line);
    border: 1px solid var(--color-line);
}
.stat {
    background: #fff;
    padding: 48px 32px;
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: all 0.3s var(--ease);
}
.stat:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); z-index: 2; }
.stat__icon {
    width: 48px; height: 48px;
    margin: 0 auto 20px;
    color: var(--brand-primary);
    opacity: 0.9;
}
.stat__value {
    font-size: clamp(40px, 4.5vw, 56px);
    font-weight: 700;
    color: var(--brand-primary);
    line-height: 1;
    letter-spacing: -0.02em;
    font-feature-settings: "tnum";
}
.stat__value-suffix { font-size: 0.5em; color: var(--brand-accent); margin-left: 2px; }
.stat__label {
    font-size: 14px; font-weight: 500;
    color: var(--color-muted);
    margin-top: 12px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}
.stat__desc {
    font-size: 12.5px;
    color: var(--color-muted);
    margin-top: 8px;
    line-height: 1.5;
}

/* ---------- 7. 关于/介绍板块 (Arburg 风格) ---------- */
.intro {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    gap: 80px;
}
.intro__media {
    position: relative;
    aspect-ratio: 4/5;
    background: var(--color-bg-soft);
    overflow: hidden;
}
.intro__media img, .intro__media svg { width: 100%; height: 100%; object-fit: cover; }
.intro__media-badge {
    position: absolute; bottom: 24px; right: 24px;
    background: var(--brand-primary);
    color: #fff;
    padding: 16px 20px;
    display: flex; align-items: center; gap: 12px;
    font-size: 13px; font-weight: 600;
    letter-spacing: 0.06em;
    box-shadow: var(--shadow-lg);
}
.intro__media-badge-num { font-size: 28px; font-weight: 700; color: var(--brand-accent); }

.intro__content { padding: 24px 0; }
.intro__features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px 24px;
    margin-top: 40px;
}
.feature__icon {
    width: 36px; height: 36px;
    color: var(--brand-primary);
    margin-bottom: 16px;
    stroke-width: 1.5;
}
.feature__title { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.feature__desc { font-size: 14.5px; color: var(--color-muted); line-height: 1.65; }

/* ---------- 8. 产品板块 ---------- */
.products {
    background: var(--color-bg-soft);
}
.products__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
    margin-top: 56px;
}
.product-card {
    background: #fff;
    overflow: hidden;
    position: relative;
    transition: all 0.4s var(--ease);
    cursor: pointer;
    border: 1px solid var(--color-line);
}
.product-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: var(--brand-primary);
}
.product-card__media {
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, #FAFBFA 0%, #EEF1EE 100%);
    overflow: hidden;
    position: relative;
    display: flex; align-items: center; justify-content: center;
}
.product-card__media::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(ellipse at 30% 30%, rgba(201, 169, 97, 0.08) 0%, transparent 60%);
    z-index: 1; pointer-events: none;
}
.product-card__media::after {
    content: ''; position: absolute; inset: 0;
    box-shadow: inset 0 0 0 1px rgba(31, 77, 62, 0.08);
    z-index: 2; pointer-events: none;
    transition: box-shadow 0.3s var(--ease);
}
.product-card:hover .product-card__media::after { box-shadow: inset 0 0 0 1px rgba(201, 169, 97, 0.3); }
.product-card__media img, .product-card__media svg {
    width: 88%; height: 88%; object-fit: contain;
    transition: transform 0.6s var(--ease);
    filter: drop-shadow(0 8px 20px rgba(15,26,20,0.10));
    z-index: 0;
}
.product-card:hover .product-card__media img,
.product-card:hover .product-card__media svg { transform: scale(1.06); }

.product-card__tag {
    position: absolute; top: 16px; left: 16px;
    background: var(--brand-primary);
    color: #fff;
    padding: 5px 12px;
    font-size: 11px; font-weight: 600;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    z-index: 2;
}
.product-card__body { padding: 28px; }
.product-card__title {
    font-size: 20px; font-weight: 600;
    margin-bottom: 10px;
    color: var(--color-ink);
    transition: color 0.3s;
}
.product-card:hover .product-card__title { color: var(--brand-primary); }
.product-card__desc { font-size: 14px; color: var(--color-muted); line-height: 1.6; }
.product-card__link {
    display: inline-flex; align-items: center; gap: 6px;
    margin-top: 16px;
    color: var(--brand-primary);
    font-size: 13px; font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
}
.product-card__link .arrow { transition: transform 0.3s var(--ease); }
.product-card:hover .product-card__link .arrow { transform: translateX(4px); }

/* ---------- 9. 实力/资质板块 ---------- */
.credentials { background: #fff; }
.credentials__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 56px;
}
.cred-card {
    background: #fff;
    border: 1px solid var(--color-line);
    padding: 32px 24px;
    text-align: center;
    position: relative;
    transition: all 0.3s var(--ease);
    overflow: hidden;
}
.cred-card::before {
    content: ''; position: absolute;
    top: 0; left: 0; right: 0; height: 3px;
    background: linear-gradient(90deg, var(--brand-primary), var(--brand-accent));
    transform: scaleX(0); transform-origin: left;
    transition: transform 0.4s var(--ease);
}
.cred-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.cred-card:hover::before { transform: scaleX(1); }
.cred-card__seal {
    width: 84px; height: 84px;
    margin: 0 auto 16px;
    display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, var(--color-bg-soft), #fff);
    border-radius: 50%;
    border: 2px solid var(--brand-primary);
    color: var(--brand-primary);
    position: relative;
}
.cred-card__seal::after {
    content: ''; position: absolute; inset: 6px;
    border: 1px solid var(--brand-accent);
    border-radius: 50%;
}
.cred-card__title { font-size: 15px; font-weight: 600; margin-bottom: 6px; }
.cred-card__sub { font-size: 12.5px; color: var(--color-muted); line-height: 1.5; }

.certs {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 16px;
    margin-top: 64px;
    padding: 32px;
    background: var(--color-bg-soft);
    border-radius: var(--radius);
}
.cert-thumb {
    aspect-ratio: 3/4;
    background: linear-gradient(135deg, #fdfcf8 0%, #f5f0e3 100%);
    border: 1px solid var(--color-line);
    display: flex; align-items: center; justify-content: center;
    padding: 8px;
    text-align: center;
    transition: all 0.3s;
    cursor: pointer;
    overflow: hidden;
    position: relative;
}
.cert-thumb::after {
    content: ''; position: absolute; inset: 0;
    box-shadow: inset 0 0 0 1px rgba(201, 169, 97, 0.15);
    pointer-events: none;
}
.cert-thumb:hover { transform: scale(1.05); box-shadow: var(--shadow-lg); border-color: var(--brand-accent); z-index: 2; }
.cert-thumb svg, .cert-thumb img { width: 100%; height: 100%; object-fit: contain; }

/* ---------- 10. 客户案例 / 大图带文字 (Arburg 风格) ---------- */
.case-feature {
    padding: 0;
    overflow: hidden;
    background: var(--color-bg-darker);
    color: #fff;
}
.case-feature__row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: stretch;
}
.case-feature__row:nth-child(even) .case-feature__media { order: 2; }
.case-feature__media {
    aspect-ratio: 16/10;
    background: var(--color-bg-dark);
    overflow: hidden;
    position: relative;
}
.case-feature__media img, .case-feature__media svg { width: 100%; height: 100%; object-fit: cover; }
.case-feature__body {
    padding: 80px 80px;
    display: flex; flex-direction: column; justify-content: center;
    background: var(--color-bg-darker);
}
.case-feature__eyebrow {
    color: var(--brand-accent);
    font-size: 12px; font-weight: 600;
    letter-spacing: 0.24em; text-transform: uppercase;
    margin-bottom: 16px;
}
.case-feature__title { color: #fff; font-size: clamp(26px, 3vw, 36px); margin-bottom: 20px; }
.case-feature__desc { color: rgba(255,255,255,0.7); font-size: 16px; line-height: 1.7; max-width: 480px; margin-bottom: 32px; }
.case-feature__meta { display: flex; gap: 32px; margin-bottom: 32px; }
.case-feature__meta-item { display: flex; flex-direction: column; }
.case-feature__meta-num { font-size: 28px; font-weight: 700; color: var(--brand-accent); }
.case-feature__meta-lbl { font-size: 12px; color: rgba(255,255,255,0.5); letter-spacing: 0.08em; text-transform: uppercase; }

.cases__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
}
.case-card {
    position: relative;
    aspect-ratio: 4/5;
    overflow: hidden;
    cursor: pointer;
    background: var(--color-bg-darker);
    border: 1px solid var(--color-line);
    transition: border-color 0.3s;
}
.case-card:hover { border-color: var(--brand-primary); }
.case-card img, .case-card svg { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s var(--ease); }
.case-card:hover img, .case-card:hover svg { transform: scale(1.08); }
.case-card__overlay {
    position: absolute; inset: 0;
    background: linear-gradient(to top, rgba(15,26,20,0.95) 0%, rgba(15,26,20,0.3) 50%, transparent 100%);
    display: flex; flex-direction: column; justify-content: flex-end;
    padding: 28px;
    color: #fff;
}
.case-card__tag { font-size: 12px; color: var(--brand-accent); letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 8px; }
.case-card__title { font-size: 18px; font-weight: 600; color: #fff; }
.case-card__arrow {
    position: absolute; top: 20px; right: 20px;
    width: 40px; height: 40px;
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: #fff;
    transition: all 0.3s;
}
.case-card:hover .case-card__arrow { background: var(--brand-primary); border-color: var(--brand-primary); transform: rotate(-45deg); }

/* ---------- 11. 流程板块 ---------- */
.process { background: var(--color-bg-soft); }
.process__grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0;
    margin-top: 64px;
    position: relative;
}
.process__grid::before {
    content: ''; position: absolute;
    top: 30px; left: 10%; right: 10%;
    height: 1px; background: repeating-linear-gradient(to right, var(--color-line) 0, var(--color-line) 8px, transparent 8px, transparent 16px);
    z-index: 0;
}
.process__step { text-align: center; position: relative; z-index: 1; padding: 0 12px; }
.process__num {
    width: 60px; height: 60px;
    background: #fff;
    border: 2px solid var(--brand-primary);
    color: var(--brand-primary);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto 20px;
    font-size: 22px; font-weight: 700;
    position: relative;
    transition: all 0.3s var(--ease);
}
.process__step:hover .process__num { background: var(--brand-primary); color: #fff; transform: scale(1.08); }
.process__title { font-size: 15px; font-weight: 600; margin-bottom: 8px; }
.process__desc { font-size: 13px; color: var(--color-muted); line-height: 1.55; }

/* ---------- 12. 客户 logo 墙 ---------- */
.clients { padding: 64px 0; background: #fff; }
.clients__title { text-align: center; color: var(--color-muted); font-size: 13px; letter-spacing: 0.2em; text-transform: uppercase; margin-bottom: 32px; }
.clients__grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 1px;
    background: var(--color-line);
    border: 1px solid var(--color-line);
}
.client-logo {
    background: #fff;
    height: 100px;
    display: flex; align-items: center; justify-content: center;
    color: var(--color-muted);
    font-weight: 600;
    font-size: 14px;
    letter-spacing: 0.04em;
    transition: all 0.3s;
}
.client-logo:hover { color: var(--brand-primary); background: var(--color-bg-soft); }

/* ---------- 9 大应用场所 (源站 gzguangding.com 核心分类) ---------- */
.scenario-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
}
.scenario-card {
    background: #fff;
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    padding: 32px 28px;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    transition: all 0.35s var(--ease);
}
.scenario-card::before {
    content: ''; position: absolute;
    top: 0; left: 0; right: 0; height: 3px;
    background: linear-gradient(90deg, var(--brand-primary), var(--brand-accent));
    transform: scaleX(0); transform-origin: left;
    transition: transform 0.35s var(--ease);
}
.scenario-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--brand-primary);
}
.scenario-card:hover::before { transform: scaleX(1); }
.scenario-card__icon {
    width: 52px; height: 52px;
    border-radius: 10px;
    background: var(--color-bg-soft);
    color: var(--brand-primary);
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 20px;
    transition: all 0.3s;
}
.scenario-card:hover .scenario-card__icon {
    background: var(--brand-primary);
    color: #fff;
}
.scenario-card__title {
    font-size: 19px; font-weight: 700;
    color: var(--color-ink);
    margin-bottom: 10px;
    display: flex; align-items: center; justify-content: space-between;
}
.scenario-card__tag {
    font-size: 11px; font-weight: 600;
    color: var(--brand-accent);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}
.scenario-card__desc {
    font-size: 14px;
    color: var(--color-muted);
    line-height: 1.65;
    margin-bottom: 16px;
    flex-grow: 1;
}
.scenario-card__spec {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 16px;
    border-top: 1px solid var(--color-line);
    font-size: 12.5px;
    color: var(--color-muted);
}
.scenario-card__spec strong {
    color: var(--brand-primary);
    font-weight: 700;
}

.partner-cert-box {
    margin-top: 48px;
    background: #fff;
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    padding: 36px 32px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    max-width: 980px;
    margin-left: auto;
    margin-right: auto;
}
.partner-cert-box p {
    font-size: 15px;
    color: var(--color-ink);
    margin-bottom: 20px;
    font-weight: 600;
    letter-spacing: 0.04em;
}
.partner-cert-box img {
    width: 100%;
    max-width: 860px;
    height: auto;
    display: block;
    margin: 0 auto;
    border-radius: 6px;
    border: 1px solid var(--color-line);
    cursor: pointer;
    transition: transform 0.3s var(--ease), box-shadow 0.3s;
}
.partner-cert-box img:hover {
    transform: scale(1.01);
    box-shadow: var(--shadow-md);
}

.clients__grid--5col {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1px;
    background: var(--color-line);
    border: 1px solid var(--color-line);
}
@media (max-width: 1024px) {
    .clients__grid--5col { grid-template-columns: repeat(4, 1fr); }
}
@media (max-width: 768px) {
    .clients__grid--5col { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- 13. CTA 板块 ---------- */
.cta-band {
    background: linear-gradient(135deg, var(--brand-primary) 0%, var(--brand-primary-dark) 100%);
    color: #fff;
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}
.cta-band::before {
    content: ''; position: absolute;
    top: -50%; right: -10%;
    width: 600px; height: 600px;
    background: radial-gradient(circle, var(--brand-accent) 0%, transparent 70%);
    opacity: 0.1;
    pointer-events: none;
}
.cta-band__inner {
    display: flex; align-items: center; justify-content: space-between;
    gap: 40px; flex-wrap: wrap;
    position: relative; z-index: 1;
}
.cta-band__title {
    color: #fff; font-size: clamp(26px, 3vw, 36px);
    font-weight: 600;
    max-width: 720px;
    line-height: 1.3;
}
.cta-band__title em { color: var(--brand-accent); font-style: normal; }
.cta-band .btn--outline { color: #fff; border-color: #fff; }
.cta-band .btn--outline:hover { background: #fff; color: var(--color-ink); }

/* ---------- 14. 新闻板块 ---------- */
.news { background: var(--color-bg-soft); }
.news__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
}
.news-card {
    background: #fff;
    overflow: hidden;
    transition: all 0.3s var(--ease);
    cursor: pointer;
}
.news-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.news-card__media {
    aspect-ratio: 16/9;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-bg-soft) 0%, #E5E7EB 100%);
    position: relative;
}
.news-card__media::after {
    content: ''; position: absolute; inset: 0;
    background: linear-gradient(180deg, transparent 0%, transparent 70%, rgba(15,26,20,0.4) 100%);
    pointer-events: none;
    z-index: 1;
}
.news-card__media img, .news-card__media svg { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s var(--ease); }
.news-card:hover .news-card__media img, .news-card:hover .news-card__media svg { transform: scale(1.06); }
.news-card__date {
    position: absolute; top: 16px; left: 16px;
    background: rgba(255,255,255,0.95);
    color: var(--brand-primary);
    padding: 8px 12px;
    text-align: center;
    font-weight: 700;
    line-height: 1.1;
}
.news-card__date-day { display: block; font-size: 20px; }
.news-card__date-mo { display: block; font-size: 11px; letter-spacing: 0.1em; text-transform: uppercase; }
.news-card__body { padding: 28px; }
.news-card__meta { font-size: 12px; color: var(--color-muted); margin-bottom: 8px; letter-spacing: 0.04em; }
.news-card__title { font-size: 18px; font-weight: 600; color: var(--color-ink); margin-bottom: 12px; transition: color 0.3s; line-height: 1.4; }
.news-card:hover .news-card__title { color: var(--brand-primary); }
.news-card__excerpt { font-size: 14px; color: var(--color-muted); line-height: 1.6; }

/* ---------- 15. 联系板块 ---------- */
.contact { background: var(--color-bg-darker); color: rgba(255,255,255,0.85); }
.contact .section-title { color: #fff; }
.contact .section-subtitle { color: rgba(255,255,255,0.65); }
.contact__grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 64px;
    margin-top: 56px;
}
.contact-info { display: flex; flex-direction: column; gap: 24px; }
.contact-item { display: flex; gap: 20px; padding: 20px; background: rgba(255,255,255,0.04); border-left: 3px solid var(--brand-accent); transition: background 0.3s; }
.contact-item:hover { background: rgba(255,255,255,0.08); }
.contact-item__icon {
    width: 48px; height: 48px;
    background: rgba(201, 169, 97, 0.15);
    color: var(--brand-accent);
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0;
}
.contact-item__title { font-size: 13px; color: rgba(255,255,255,0.6); letter-spacing: 0.1em; text-transform: uppercase; margin-bottom: 6px; }
.contact-item__text { color: #fff; font-size: 16px; line-height: 1.5; }
.contact-item__text strong { display: block; font-size: 22px; color: var(--brand-accent); font-weight: 600; }

.contact-form {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    padding: 40px;
}
.contact-form__title { color: #fff; font-size: 22px; margin-bottom: 24px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.form-group { display: flex; flex-direction: column; }
.form-group label { font-size: 12px; color: rgba(255,255,255,0.6); margin-bottom: 6px; letter-spacing: 0.06em; text-transform: uppercase; }
.form-group input, .form-group textarea, .form-group select {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.12);
    color: #fff;
    padding: 12px 16px;
    font-family: inherit;
    font-size: 14px;
    transition: all 0.2s;
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    outline: none;
    border-color: var(--brand-accent);
    background: rgba(255,255,255,0.1);
}
.form-group textarea { min-height: 100px; resize: vertical; }
.form-group input::placeholder, .form-group textarea::placeholder { color: rgba(255,255,255,0.4); }
.contact-form button[type=submit] { width: 100%; margin-top: 8px; }

/* ---------- 16. 页脚 ---------- */
.footer {
    background: var(--color-bg-darker);
    color: rgba(255,255,255,0.65);
    padding: 64px 0 0;
    border-top: 1px solid rgba(255,255,255,0.06);
}
.footer__grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer__brand .logo { color: #fff; margin-bottom: 20px; }
.footer__brand .logo__title { color: #fff; }
.footer__brand p { font-size: 14px; line-height: 1.7; margin: 0 0 20px; }
.footer__social { display: flex; gap: 10px; }
.footer__social a {
    width: 38px; height: 38px;
    background: rgba(255,255,255,0.06);
    display: flex; align-items: center; justify-content: center;
    transition: all 0.3s;
}
.footer__social a:hover { background: var(--brand-primary); color: #fff; }
.footer__col h4 {
    color: #fff;
    font-size: 14px; font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    position: relative; padding-bottom: 12px;
}
.footer__col h4::after {
    content: ''; position: absolute;
    bottom: 0; left: 0;
    width: 24px; height: 2px; background: var(--brand-accent);
}
.footer__col ul li { margin-bottom: 10px; }
.footer__col a {
    color: rgba(255,255,255,0.65);
    font-size: 14px;
    transition: all 0.2s;
    display: inline-flex; align-items: center; gap: 6px;
}
.footer__col a:hover { color: var(--brand-accent); padding-left: 4px; }
.footer__col a::before { content: '›'; opacity: 0; transition: opacity 0.2s; color: var(--brand-accent); }
.footer__col a:hover::before { opacity: 1; }

.footer__bottom {
    padding: 24px 0;
    display: flex; justify-content: space-between; align-items: center;
    font-size: 13px;
    flex-wrap: wrap; gap: 16px;
}
.footer__bottom-links { display: flex; gap: 20px; }
.footer__bottom-links a { color: rgba(255,255,255,0.5); }
.footer__bottom-links a:hover { color: var(--brand-accent); }

/* ---------- 17. 子页面通用 ---------- */
.page-hero {
    height: 360px;
    background: linear-gradient(135deg, var(--color-bg-darker) 0%, var(--brand-primary-dark) 100%);
    color: #fff;
    position: relative;
    display: flex; align-items: center;
    overflow: hidden;
}
.page-hero::before {
    content: ''; position: absolute; inset: 0;
    background-image:
        linear-gradient(rgba(15,26,20,0.6), rgba(15,26,20,0.6)),
        radial-gradient(circle at 20% 50%, var(--brand-primary) 0%, transparent 50%),
        radial-gradient(circle at 80% 30%, var(--brand-accent) 0%, transparent 30%);
    opacity: 0.4;
}
.page-hero__inner { position: relative; z-index: 1; }
.page-hero__title { color: #fff; font-size: clamp(32px, 4vw, 48px); margin-bottom: 16px; }
.page-hero__desc { color: rgba(255,255,255,0.7); font-size: 17px; max-width: 640px; }
.breadcrumb {
    display: flex; align-items: center; gap: 8px;
    color: rgba(255,255,255,0.55); font-size: 13px;
    margin-bottom: 16px; letter-spacing: 0.04em;
}
.breadcrumb a { color: rgba(255,255,255,0.55); }
.breadcrumb a:hover { color: var(--brand-accent); }
.breadcrumb span { color: rgba(255,255,255,0.3); }

/* 滚动动画 - 默认可见 */
.reveal { opacity: 1; transform: translateY(0); transition: all 0.9s var(--ease); }
.reveal--preinit { opacity: 0 !important; transform: translateY(40px); }
.reveal--left.reveal--preinit { transform: translateX(-40px); }
.reveal--right.reveal--preinit { transform: translateX(40px); }
.reveal--zoom.reveal--preinit { transform: scale(0.95); }
.reveal.is-in { opacity: 1 !important; transform: translateY(0); }
.reveal--left.is-in { transform: translateX(0); }
.reveal--right.is-in { transform: translateX(0); }
.reveal--zoom.is-in { transform: scale(1); }

/* ---------- 18. 新增工业风与交互组件 (Arburg 升级) ---------- */

/* 18.1 Bento Grid 工业实力矩阵 */
.strength-bento {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: minmax(180px, auto);
    gap: 20px;
    margin-top: 56px;
}
.bento-card {
    background: #fff;
    border: 1px solid var(--color-line);
    padding: 32px;
    border-radius: var(--radius);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all 0.35s var(--ease);
}
.bento-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--brand-primary);
}
.bento-card--featured {
    grid-column: span 2;
    grid-row: span 2;
    background: linear-gradient(135deg, var(--brand-primary-dark) 0%, var(--brand-primary) 100%);
    color: #fff;
    border: none;
    padding: 44px;
}
.bento-card--featured .bento-card__title { color: #fff; }
.bento-card--featured .bento-card__desc { color: rgba(255,255,255,0.8); }
.bento-card--featured::after {
    content: ''; position: absolute; right: -20px; bottom: -20px;
    width: 220px; height: 220px;
    background: radial-gradient(circle, var(--brand-accent) 0%, transparent 70%);
    opacity: 0.2; pointer-events: none;
}
.bento-card--wide { grid-column: span 2; }
.bento-card__icon {
    width: 44px; height: 44px;
    color: var(--brand-primary);
    margin-bottom: 20px;
    display: flex; align-items: center; justify-content: center;
    background: var(--color-bg-soft);
    border-radius: var(--radius);
}
.bento-card--featured .bento-card__icon {
    background: rgba(255,255,255,0.12);
    color: var(--brand-accent);
}
.bento-card__num {
    font-size: clamp(36px, 4vw, 52px);
    font-weight: 800;
    line-height: 1;
    color: var(--brand-primary);
    font-feature-settings: "tnum";
    letter-spacing: -0.02em;
    margin-bottom: 8px;
}
.bento-card--featured .bento-card__num { color: var(--brand-accent); }
.bento-card__title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
    color: var(--color-ink);
}
.bento-card__desc {
    font-size: 13.5px;
    color: var(--color-muted);
    line-height: 1.6;
}

/* 18.2 节能效益与 ROI 在线测算器 */
.calc-section {
    background: linear-gradient(180deg, #F8FAFC 0%, #EDF2F7 100%);
    border-top: 1px solid var(--color-line);
    border-bottom: 1px solid var(--color-line);
    position: relative;
}
.calc-wrapper {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 48px;
    align-items: center;
    background: #fff;
    padding: 48px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-line);
    margin-top: 48px;
}
.calc-controls { display: flex; flex-direction: column; gap: 28px; }
.calc-control-group { display: flex; flex-direction: column; gap: 10px; }
.calc-control-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.calc-label { font-size: 14px; font-weight: 600; color: var(--color-ink); }
.calc-badge-val {
    background: var(--brand-primary);
    color: #fff;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 700;
}
.calc-range {
    width: 100%;
    height: 8px;
    border-radius: 4px;
    background: #E2E8F0;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    cursor: pointer;
}
.calc-range::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--brand-primary);
    border: 3px solid #fff;
    box-shadow: 0 2px 6px rgba(0,0,0,0.25);
    cursor: pointer;
    transition: transform 0.15s;
}
.calc-range::-webkit-slider-thumb:hover { transform: scale(1.15); }
.calc-range::-moz-range-thumb {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--brand-primary);
    border: 3px solid #fff;
    box-shadow: 0 2px 6px rgba(0,0,0,0.25);
    cursor: pointer;
}
.calc-results {
    background: linear-gradient(145deg, var(--brand-primary-dark) 0%, var(--brand-primary) 100%);
    color: #fff;
    padding: 36px;
    border-radius: var(--radius);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    position: relative;
    overflow: hidden;
}
.calc-results::before {
    content: ''; position: absolute; top: -50px; right: -50px;
    width: 180px; height: 180px;
    background: radial-gradient(circle, var(--brand-accent) 0%, transparent 70%);
    opacity: 0.25;
}
.calc-result-item { display: flex; flex-direction: column; position: relative; z-index: 1; }
.calc-result-item--full { grid-column: span 2; border-bottom: 1px solid rgba(255,255,255,0.15); padding-bottom: 20px; }
.calc-result-num {
    font-size: clamp(32px, 3.5vw, 44px);
    font-weight: 800;
    color: var(--brand-accent);
    line-height: 1.1;
    font-feature-settings: "tnum";
}
.calc-result-lbl {
    font-size: 12px;
    color: rgba(255,255,255,0.7);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    margin-top: 6px;
}
.calc-result-tip {
    grid-column: span 2;
    font-size: 12px;
    color: rgba(255,255,255,0.6);
    line-height: 1.5;
    margin-top: 8px;
}

/* 18.3 真实专利与资质大图展示 (带悬停放大与 Lightbox 触发) */
.real-cert-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 16px;
    margin-top: 48px;
}
.real-cert-card {
    background: #fff;
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    overflow: hidden;
    cursor: pointer;
    position: relative;
    aspect-ratio: 3/4;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 12px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s var(--ease);
}
.real-cert-card img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: transform 0.4s var(--ease);
}
.real-cert-card__overlay {
    position: absolute;
    inset: 0;
    background: rgba(31, 77, 62, 0.88);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    color: #fff;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s var(--ease);
    padding: 16px;
    text-align: center;
}
.real-cert-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-xl);
    border-color: var(--brand-accent);
    z-index: 5;
}
.real-cert-card:hover img { transform: scale(1.08); }
.real-cert-card:hover .real-cert-card__overlay {
    opacity: 1;
    visibility: visible;
}
.real-cert-card__icon {
    width: 32px; height: 32px;
    background: var(--brand-accent);
    color: var(--color-ink);
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
}
.real-cert-card__title { font-size: 12px; font-weight: 600; line-height: 1.3; }

/* 18.4 Lightbox 弹窗 */
.gd-lightbox {
    position: fixed;
    inset: 0;
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s var(--ease);
}
.gd-lightbox.is-open {
    opacity: 1;
    visibility: visible;
}
.gd-lightbox__backdrop {
    position: absolute;
    inset: 0;
    background: rgba(10, 17, 13, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.gd-lightbox__content {
    position: relative;
    z-index: 2;
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    transform: scale(0.92);
    transition: transform 0.3s var(--ease);
}
.gd-lightbox.is-open .gd-lightbox__content { transform: scale(1); }
.gd-lightbox__img {
    max-width: 85vw;
    max-height: 78vh;
    object-fit: contain;
    border-radius: var(--radius);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    background: #fff;
    padding: 8px;
}
.gd-lightbox__caption {
    margin-top: 16px;
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    text-align: center;
    background: rgba(0,0,0,0.6);
    padding: 6px 18px;
    border-radius: 20px;
}
.gd-lightbox__close {
    position: absolute;
    top: -48px;
    right: -12px;
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.2);
    border-radius: 50%;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background 0.2s;
}
.gd-lightbox__close:hover { background: var(--brand-accent); color: var(--color-ink); }

/* 18.5 分类筛选 Tab 控件 (产品 & 案例) */
.filter-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin: 40px 0 48px;
}
.filter-tab {
    padding: 10px 24px;
    font-size: 14px;
    font-weight: 600;
    border: 1.5px solid var(--color-line);
    border-radius: 30px;
    background: #fff;
    color: var(--color-text);
    cursor: pointer;
    transition: all 0.25s var(--ease);
}
.filter-tab:hover {
    border-color: var(--brand-primary);
    color: var(--brand-primary);
}
.filter-tab.is-active {
    background: var(--brand-primary);
    color: #fff;
    border-color: var(--brand-primary);
    box-shadow: var(--shadow-sm);
}

/* 18.6 FAQ 折叠面板 (Accordion) */
.accordion {
    max-width: 880px;
    margin: 48px auto 0;
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.accordion__item {
    background: #fff;
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    overflow: hidden;
    transition: border-color 0.2s;
}
.accordion__item.is-open {
    border-color: var(--brand-primary);
    box-shadow: var(--shadow-sm);
}
.accordion__header {
    width: 100%;
    padding: 22px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    text-align: left;
    font-size: 16px;
    font-weight: 600;
    color: var(--color-ink);
    cursor: pointer;
    background: #fff;
    transition: background 0.2s;
}
.accordion__header:hover { background: var(--color-bg-soft); }
.accordion__icon {
    width: 24px;
    height: 24px;
    color: var(--brand-primary);
    transition: transform 0.3s var(--ease);
    flex-shrink: 0;
}
.accordion__item.is-open .accordion__icon { transform: rotate(180deg); }
.accordion__body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s var(--ease);
    background: #FAFBFA;
}
.accordion__item.is-open .accordion__body {
    max-height: 300px;
}
.accordion__content {
    padding: 0 28px 24px;
    font-size: 14.5px;
    color: var(--color-muted);
    line-height: 1.7;
}

/* 18.7 全站浮动挂件 (快速咨询 & 返回顶部) */
.floating-widget {
    position: fixed;
    right: 24px;
    bottom: 32px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 900;
}
.floating-btn {
    width: 48px;
    height: 48px;
    background: #fff;
    color: var(--brand-primary);
    border: 1px solid var(--color-line);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    cursor: pointer;
    transition: all 0.3s var(--ease);
    position: relative;
}
.floating-btn:hover {
    background: var(--brand-primary);
    color: #fff;
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}
.floating-btn--primary {
    background: var(--brand-primary);
    color: #fff;
    border-color: var(--brand-primary);
}
.floating-btn--primary:hover {
    background: var(--brand-primary-dark);
}
.floating-btn--top {
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
}
.floating-btn--top.is-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.floating-tooltip {
    position: absolute;
    right: calc(100% + 12px);
    top: 50%;
    transform: translateY(-50%);
    background: var(--color-bg-darker);
    color: #fff;
    font-size: 12px;
    font-weight: 500;
    padding: 6px 12px;
    border-radius: 4px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s;
    pointer-events: none;
}
.floating-btn:hover .floating-tooltip {
    opacity: 1;
    visibility: visible;
}

/* ---------- 19. 响应式规则强化 ---------- */
@media (max-width: 1024px) {
    .stats__grid { grid-template-columns: repeat(2, 1fr); }
    .products__grid, .cases__grid, .news__grid { grid-template-columns: repeat(2, 1fr); }
    .credentials__grid { grid-template-columns: repeat(2, 1fr); }
    .certs, .real-cert-grid { grid-template-columns: repeat(3, 1fr); }
    .strength-bento { grid-template-columns: repeat(2, 1fr); }
    .bento-card--featured { grid-column: span 2; grid-row: span 1; }
    .bento-card--wide { grid-column: span 2; }
    .calc-wrapper { grid-template-columns: 1fr; padding: 32px; }
    .intro { grid-template-columns: 1fr; gap: 40px; }
    .contact__grid { grid-template-columns: 1fr; gap: 40px; }
    .footer__grid { grid-template-columns: 1fr 1fr; gap: 32px; }
    .case-feature__row { grid-template-columns: 1fr; }
    .case-feature__row:nth-child(even) .case-feature__media { order: 0; }
    .case-feature__body { padding: 48px 32px; }
    .process__grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
    .process__grid::before { display: none; }
}
@media (max-width: 768px) {
    .section { padding: 64px 0; }
    .stats__grid { grid-template-columns: 1fr 1fr; }
    .products__grid, .cases__grid, .news__grid, .scenario-grid { grid-template-columns: 1fr; }
    .credentials__grid { grid-template-columns: 1fr 1fr; }
    .certs, .real-cert-grid { grid-template-columns: repeat(2, 1fr); }
    .strength-bento { grid-template-columns: 1fr; }
    .bento-card--featured, .bento-card--wide { grid-column: span 1; }
    .clients__grid { grid-template-columns: repeat(3, 1fr); }
    .footer__grid { grid-template-columns: 1fr; }
    .intro__features { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .calc-results { grid-template-columns: 1fr; }
    .calc-result-item--full { grid-column: span 1; }

    /* 移动端导航抽屉 */
    .header__phone { display: none; }
    .menu-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 44px;
        height: 44px;
        color: var(--color-ink);
        border: 1px solid var(--color-line);
        border-radius: var(--radius);
        background: #fff;
        z-index: 1001;
    }
    .menu-toggle svg { width: 22px; height: 22px; }
    
    .nav {
        display: block;
        position: fixed;
        top: var(--header-h);
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(14, 26, 20, 0.96);
        backdrop-filter: blur(16px);
        -webkit-backdrop-filter: blur(16px);
        padding: 24px 28px 48px;
        overflow-y: auto;
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: transform 0.35s var(--ease), opacity 0.3s var(--ease);
        z-index: 999;
    }
    .nav.is-open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }
    .nav__list {
        flex-direction: column;
        gap: 6px;
        align-items: stretch;
    }
    .nav__item {
        width: 100%;
    }
    .nav__link {
        color: #fff;
        font-size: 17px;
        font-weight: 600;
        padding: 14px 0;
        display: flex;
        align-items: center;
        justify-content: space-between;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }
    .nav__link:hover, .nav__item.is-active .nav__link {
        color: var(--brand-accent);
    }
    .nav__sub {
        position: static;
        display: block;
        background: rgba(255, 255, 255, 0.04);
        padding: 6px 16px;
        margin: 4px 0 10px;
        border: none;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        transform: none;
        border-radius: var(--radius);
    }
    .nav__sub li a {
        color: rgba(255, 255, 255, 0.7);
        font-size: 14px;
        padding: 8px 0;
        display: block;
    }
    .nav__sub li a:hover {
        color: var(--brand-accent);
    }
    body.menu-open {
        overflow: hidden;
    }

    /* 移动端 Topbar 精简 */
    .topbar__inner { justify-content: space-between; }
    .topbar__left { gap: 10px; }
    .topbar__left .topbar__item:nth-child(2),
    .topbar__left .topbar__item:nth-child(3),
    .topbar__left .topbar__item[data-greeting] {
        display: none !important;
    }
    .topbar__left .topbar__item:first-child {
        font-size: 12px;
        white-space: nowrap;
    }

    .hero { height: auto; min-height: 600px; padding: 80px 0; }
    .hero__inner { flex-direction: column; align-items: flex-start; gap: 32px; }
    .hero__visual { width: 100%; max-width: 100%; }
    .hero__arrow { display: none; }
    .hero__nav { right: 24px; bottom: 24px; }
    .hero__scroll { display: none; }

    .case-feature__meta { gap: 16px; }
    .floating-widget { right: 16px; bottom: 20px; }
}
@media (max-width: 480px) {
    .stats__grid { grid-template-columns: 1fr; }
    .credentials__grid { grid-template-columns: 1fr; }
    .process__grid { grid-template-columns: 1fr; }
    .cta-band__inner { flex-direction: column; align-items: flex-start; }
    .calc-wrapper { padding: 24px 16px; }
}

/* ---------- 19. 新闻详情页样式 ---------- */
.article-section {
    padding: 64px 0 96px;
    background: var(--color-bg);
}
.article-layout {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 360px;
    gap: 48px;
    align-items: start;
}
.article-main {
    background: #fff;
    border: 1px solid var(--color-line);
    padding: 48px 44px;
    box-shadow: var(--shadow-sm);
}
.article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 20px;
    font-size: 13px;
    color: var(--color-muted);
    margin-bottom: 20px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--color-line);
}
.article-meta__item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.article-tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(10, 61, 46, 0.08);
    color: var(--brand-primary);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}
.article-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-ink);
    line-height: 1.35;
    margin-bottom: 24px;
}
.article-lead {
    font-size: 16px;
    line-height: 1.8;
    color: var(--color-muted);
    background: #f8faf9;
    border-left: 4px solid var(--brand-primary);
    padding: 20px 24px;
    margin-bottom: 36px;
}
.article-featured-img {
    width: 100%;
    max-height: 460px;
    object-fit: cover;
    margin-bottom: 36px;
    border: 1px solid var(--color-line);
}
.article-body {
    font-size: 16px;
    line-height: 1.9;
    color: #2b3338;
}
.article-body h2 {
    font-size: 22px;
    font-weight: 700;
    color: var(--brand-primary);
    margin: 40px 0 16px;
    padding-bottom: 8px;
    border-bottom: 2px solid rgba(10, 61, 46, 0.12);
}
.article-body h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-ink);
    margin: 28px 0 12px;
}
.article-body p {
    margin-bottom: 20px;
}
.article-body ul, .article-body ol {
    margin: 16px 0 24px 24px;
}
.article-body li {
    margin-bottom: 10px;
    line-height: 1.7;
}
.article-stat-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin: 32px 0;
}
.article-stat-card {
    background: #f8faf9;
    border: 1px solid rgba(10, 61, 46, 0.12);
    padding: 24px 20px;
    text-align: center;
}
.article-stat-card__num {
    font-size: 32px;
    font-weight: 700;
    color: var(--brand-accent);
    line-height: 1.1;
    margin-bottom: 6px;
    font-family: serif;
}
.article-stat-card__lbl {
    font-size: 12px;
    color: var(--color-muted);
    font-weight: 500;
}
.article-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 24px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--color-line);
}
.article-nav__btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 600;
    color: var(--brand-primary);
    padding: 12px 20px;
    border: 1px solid var(--color-line);
    background: #fff;
    transition: all 0.25s var(--ease);
}
.article-nav__btn:hover {
    border-color: var(--brand-primary);
    background: var(--brand-primary);
    color: #fff;
}

/* Sidebar Widgets */
.sidebar-widget {
    background: #fff;
    border: 1px solid var(--color-line);
    padding: 32px 28px;
    margin-bottom: 32px;
    box-shadow: var(--shadow-sm);
}
.sidebar-widget__title {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-ink);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--brand-accent);
    letter-spacing: 0.04em;
    text-transform: uppercase;
}
.sidebar-news-list {
    display: flex;
    flex-direction: column;
    gap: 18px;
}
.sidebar-news-item {
    display: flex;
    gap: 14px;
    align-items: flex-start;
    padding-bottom: 18px;
    border-bottom: 1px dashed var(--color-line);
}
.sidebar-news-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}
.sidebar-news-item__img {
    width: 80px;
    height: 60px;
    object-fit: cover;
    flex-shrink: 0;
}
.sidebar-news-item__title {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-ink);
    line-height: 1.4;
    transition: color 0.2s;
}
.sidebar-news-item:hover .sidebar-news-item__title {
    color: var(--brand-primary);
}
.sidebar-news-item__date {
    font-size: 11px;
    color: var(--color-muted);
    margin-top: 4px;
}

@media (max-width: 992px) {
    .article-layout { grid-template-columns: 1fr; gap: 40px; }
    .article-main { padding: 32px 24px; }
    .article-title { font-size: 26px; }
    .article-stat-grid { grid-template-columns: 1fr; }
}