/* ============================================================
   AeroCorePro 共享样式 — 顶部导航 + 底部页脚 + 公共工具类
   此文件由各页面的 style.css 通过 @import 引入（仅作参考），
   实际上每个页面的 style.css 已内联这些样式。
   ============================================================ */

/* ---- 全局盒模型 ---- */
*, *::before, *::after { box-sizing: border-box; }

/* ---- CSS 变量 ---- */
:root {
    --acp-primary:          #e83f1e;
    --acp-primary-hover:    #c93517;
    --acp-primary-light:    rgba(232, 63, 30, .10);
    --acp-secondary:        #34217a;
    --acp-secondary-hover:  #4a31a0;
    --acp-secondary-light:  rgba(52, 33, 122, .10);
    --acp-dark:             #24211c;
    --acp-dark-text:        rgba(255, 255, 255, .75);
    --acp-light-bg:         #f4f6f9;
    --acp-border:           #e5e7eb;
    --acp-text:             #1e293b;
    --acp-text-muted:       #64748b;
    --acp-radius:           12px;
    --acp-radius-sm:        6px;
    --acp-shadow:           0 2px 12px rgba(0, 0, 0, .06);
    --acp-shadow-lg:        0 8px 32px rgba(0, 0, 0, .12);
    --acp-transition:       0.22s ease;
    --acp-container:        1200px;
    --acp-header-h:         72px;
}

/* ==============================================================
   顶部导航 .acp-site-header
   ============================================================== */
.acp-site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
    transition: box-shadow var(--acp-transition);
}
.acp-site-header.is-scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, .22);
}
.acp-site-header__inner {
    display: flex;
    align-items: center;
    max-width: var(--acp-container);
    margin: 0 auto;
    padding: 0 24px;
    height: var(--acp-header-h);
    gap: 32px;
}

/* Logo */
.acp-site-header__logo {
    text-decoration: none;
    flex-shrink: 0;
    display: flex;
    align-items: center;
}
.acp-site-header__logo-img {
    height: 40px;
    width: auto;
    display: block;
}
.acp-site-header__logo-text {
    font-size: 22px;
    font-weight: 800;
    letter-spacing: -0.03em;
    color: inherit;
}

/* Nav */
.acp-site-header__nav {
    flex: 1;
    display: flex;
    justify-content: flex-end;
}
.acp-site-header__menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 2px;
    align-items: center;
}
.acp-site-header__menu .menu-item {
    position: relative;
}
.acp-site-header__menu .menu-item > a {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 8px 14px;
    color: inherit;
    text-decoration: none;
    font-size: 15px;
    font-weight: 500;
    border-radius: var(--acp-radius-sm);
    transition: color var(--acp-transition);
    white-space: nowrap;
    position: relative;
}
.acp-site-header__menu .menu-item > a::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 14px;
    right: 14px;
    height: 2px;
    background: var(--acp-primary);
    border-radius: 2px;
    transform: scaleX(0);
    transition: transform var(--acp-transition);
}
.acp-site-header__menu .menu-item-has-children > a::after { display: none; }
.acp-site-header__menu .menu-item > a:hover,
.acp-site-header__menu .menu-item.current-menu-item > a,
.acp-site-header__menu .menu-item.current-menu-parent > a {
    color: var(--acp-primary);
}
.acp-site-header__menu .menu-item > a:hover::after,
.acp-site-header__menu .menu-item.current-menu-item > a::after {
    transform: scaleX(1);
}
/* 下拉箭头 */
.acp-site-header__menu .menu-item-has-children > a .acp-arrow {
    display: inline-block;
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 4px solid currentColor;
    margin-left: 2px;
    transition: transform var(--acp-transition);
    opacity: .6;
}
.acp-site-header__menu .menu-item-has-children:hover > a .acp-arrow,
.acp-site-header__menu .menu-item-has-children.is-open > a .acp-arrow {
    transform: rotate(180deg);
}
/* 下拉菜单 */
.acp-site-header__menu .sub-menu {
    position: absolute;
    top: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%) translateY(-6px);
    min-width: 168px;
    background: #ffffff;
    border-radius: 10px;
    box-shadow: var(--acp-shadow-lg);
    padding: 6px;
    list-style: none;
    margin: 0;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--acp-transition), transform var(--acp-transition);
    pointer-events: none;
    z-index: 100;
}
.acp-site-header__menu .menu-item-has-children:hover > .sub-menu,
.acp-site-header__menu .menu-item-has-children.is-open > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
    pointer-events: auto;
}
.acp-site-header__menu .sub-menu::before {
    content: '';
    position: absolute;
    top: -6px;
    left: 50%;
    transform: translateX(-50%);
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-bottom: 6px solid #ffffff;
}
.acp-site-header__menu .sub-menu .menu-item > a {
    color: var(--acp-text);
    background: transparent;
    padding: 9px 12px;
    border-radius: var(--acp-radius-sm);
    font-size: 14px;
    font-weight: 400;
    display: block;
}
.acp-site-header__menu .sub-menu .menu-item > a:hover {
    background: var(--acp-secondary-light);
    color: var(--acp-secondary);
}

/* 右侧操作区 */
.acp-site-header__actions {
    display: flex;
    align-items: center;
    gap: 4px;
    flex-shrink: 0;
}

/* 搜索按钮 */
.acp-site-header__search-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    background: transparent;
    border: none;
    cursor: pointer;
    border-radius: 6px;
    color: inherit;
    transition: color var(--acp-transition), background var(--acp-transition);
    padding: 0;
}
.acp-site-header__search-btn:hover {
    color: var(--acp-primary);
    background: var(--acp-primary-light);
}

/* 搜索面板 */
.acp-site-header__search-panel {
    position: absolute;
    top: 100%;
    right: 0;
    left: 0;
    background: #ffffff;
    border-top: 1px solid var(--acp-border);
    border-bottom: 1px solid var(--acp-border);
    box-shadow: 0 8px 24px rgba(0,0,0,.08);
    padding: 16px 24px;
    z-index: 999;
}
.acp-site-header__search-panel[hidden] { display: none; }
.acp-site-header__search-form {
    display: flex;
    align-items: center;
    max-width: 640px;
    margin: 0 auto;
    gap: 0;
    border: 1.5px solid var(--acp-border);
    border-radius: 8px;
    overflow: hidden;
    background: #f8fafc;
    transition: border-color var(--acp-transition);
}
.acp-site-header__search-form:focus-within {
    border-color: var(--acp-secondary);
}
.acp-site-header__search-input {
    flex: 1;
    border: none;
    background: transparent;
    padding: 11px 16px;
    font-size: 15px;
    color: var(--acp-text);
    outline: none;
}
.acp-site-header__search-input::placeholder { color: #94a3b8; }
.acp-site-header__search-form button[type="submit"] {
    background: transparent;
    border: none;
    padding: 0 14px;
    cursor: pointer;
    color: var(--acp-text-muted);
    display: flex;
    align-items: center;
    transition: color var(--acp-transition);
}
.acp-site-header__search-form button[type="submit"]:hover { color: var(--acp-primary); }

/* 移动端汉堡按钮 */
.acp-site-header__toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 38px;
    height: 38px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 5px;
    border-radius: 6px;
    transition: background var(--acp-transition);
    color: inherit;
}
.acp-site-header__toggle:hover {
    background: rgba(0, 0, 0, .06);
}
.acp-site-header__toggle span {
    display: block;
    height: 2px;
    background: currentColor;
    border-radius: 2px;
    transition: transform .3s, opacity .3s;
}
.acp-site-header__toggle.is-active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}
.acp-site-header__toggle.is-active span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0);
}
.acp-site-header__toggle.is-active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

/* 移动端菜单面板 */
.acp-site-header__mobile-nav {
    display: none;
    position: fixed;
    top: var(--acp-header-h);
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 998;
    overflow-y: auto;
    padding: 8px 24px 32px;
    transform: translateX(100%);
    transition: transform .3s cubic-bezier(.4, 0, .2, 1);
}
.acp-site-header__mobile-nav.is-open {
    display: block;
    transform: translateX(0);
}
.acp-site-header__mobile-nav .acp-site-header__menu {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
}
.acp-site-header__mobile-nav .acp-site-header__menu .menu-item > a {
    padding: 13px 4px;
    border-bottom: 1px solid var(--acp-border);
    border-radius: 0;
    font-size: 16px;
    width: 100%;
    justify-content: space-between;
    color: var(--acp-text);
}
.acp-site-header__mobile-nav .acp-site-header__menu .menu-item > a:hover {
    background: transparent;
    color: var(--acp-primary);
}
.acp-site-header__mobile-nav .sub-menu {
    position: static;
    transform: none !important;
    opacity: 1 !important;
    visibility: visible !important;
    pointer-events: auto !important;
    background: var(--acp-light-bg);
    box-shadow: none;
    border-radius: var(--acp-radius-sm);
    padding: 4px 0;
    margin: 4px 0 8px;
}
.acp-site-header__mobile-nav .sub-menu::before { display: none; }
.acp-site-header__mobile-nav .sub-menu .menu-item > a {
    color: var(--acp-text-muted);
    padding: 10px 16px;
    border-bottom: none;
    font-size: 14px;
}
.acp-site-header__mobile-nav .sub-menu .menu-item > a:hover {
    color: var(--acp-primary);
    background: transparent;
}

/* 移动端搜索表单 */
.acp-site-header__mobile-search {
    display: flex;
    align-items: center;
    gap: 0;
    margin-top: 20px;
    border: 1.5px solid var(--acp-border);
    border-radius: 8px;
    overflow: hidden;
    background: var(--acp-light-bg);
}
.acp-site-header__mobile-search input[type="search"] {
    flex: 1;
    border: none;
    background: transparent;
    padding: 11px 14px;
    font-size: 15px;
    color: var(--acp-text);
    outline: none;
}
.acp-site-header__mobile-search button[type="submit"] {
    background: transparent;
    border: none;
    padding: 0 14px;
    cursor: pointer;
    color: var(--acp-text-muted);
    display: flex;
    align-items: center;
}

@media (max-width: 900px) {
    .acp-site-header__nav { display: none; }
    .acp-site-header__search-btn { display: none; }
    .acp-site-header__search-panel { display: none !important; }
    .acp-site-header__toggle { display: flex; }
}

/* ==============================================================
   底部页脚 .acp-site-footer
   ============================================================== */
.acp-site-footer {
    font-size: 14px;
    line-height: 1.75;
}
.acp-site-footer__top {
    padding: 64px 24px 48px;
}
.acp-site-footer__inner {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.2fr;
    gap: 40px;
    max-width: var(--acp-container);
    margin: 0 auto;
}
.acp-site-footer__logo-img {
    height: 36px;
    width: auto;
    display: block;
    margin-bottom: 14px;
    opacity: .9;
}
.acp-site-footer__brand-name {
    font-size: 20px;
    font-weight: 800;
    color: #ffffff;
    margin: 0 0 10px;
    letter-spacing: -0.02em;
}
.acp-site-footer__brand-desc {
    margin: 0;
    font-size: 13px;
    color: rgba(255, 255, 255, .55);
    line-height: 1.7;
}
.acp-site-footer__col-title {
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .1em;
    color: rgba(255, 255, 255, .45);
    margin: 0 0 16px;
}
.acp-site-footer__link-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 9px;
}
.acp-site-footer__link-list a {
    color: rgba(255, 255, 255, .65);
    text-decoration: none;
    font-size: 13px;
    transition: color var(--acp-transition);
}
.acp-site-footer__link-list a:hover {
    color: var(--acp-primary);
}
.acp-site-footer__hours {
    color: rgba(255, 255, 255, .6);
    font-size: 13px;
    margin: 0;
    line-height: 1.9;
}
.acp-site-footer__bottom {
    border-top: 1px solid rgba(255, 255, 255, .08);
    padding: 20px 24px;
}
.acp-site-footer__bottom-inner {
    max-width: var(--acp-container);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    flex-wrap: wrap;
}
.acp-site-footer__copyright {
    color: rgba(255, 255, 255, .35);
    font-size: 12px;
    margin: 0;
}
.acp-site-footer__icp {
    color: rgba(255, 255, 255, .28);
    font-size: 12px;
    text-decoration: none;
    transition: color var(--acp-transition);
}
.acp-site-footer__icp:hover { color: rgba(255, 255, 255, .55); }

@media (max-width: 900px) {
    .acp-site-footer__inner {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
}
@media (max-width: 600px) {
    .acp-site-footer__top { padding: 48px 20px 36px; }
    .acp-site-footer__inner {
        grid-template-columns: 1fr;
        gap: 28px;
    }
    .acp-site-footer__bottom-inner {
        flex-direction: column;
        text-align: center;
        gap: 8px;
    }
}

/* ==============================================================
   公共页面工具类
   ============================================================== */
.acp-page-body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, 'PingFang SC', 'Hiragino Sans GB',
                 'Microsoft YaHei', 'Segoe UI', Roboto, Arial, sans-serif;
    color: var(--acp-text);
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    background: #ffffff;
}
.acp-container {
    max-width: var(--acp-container);
    margin: 0 auto;
    padding: 0 24px;
}
.acp-section {
    padding: 88px 24px;
}
.acp-section--light   { background: var(--acp-light-bg); }
.acp-section--white   { background: #ffffff; }
.acp-section--dark    { background: var(--acp-dark); color: #fff; }
.acp-section--brand   { background: var(--acp-secondary); color: #fff; }
.acp-section__header  {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 56px;
}
.acp-section__tag {
    display: inline-block;
    padding: 4px 14px;
    background: var(--acp-primary-light);
    color: var(--acp-primary);
    border-radius: 20px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .06em;
    text-transform: uppercase;
    margin-bottom: 14px;
}
.acp-section--dark  .acp-section__tag,
.acp-section--brand .acp-section__tag {
    background: rgba(255, 255, 255, .15);
    color: rgba(255, 255, 255, .9);
}
.acp-section__title {
    font-size: 36px;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin: 0 0 14px;
    line-height: 1.2;
}
.acp-section--dark  .acp-section__title,
.acp-section--brand .acp-section__title { color: #ffffff; }
.acp-section__subtitle {
    font-size: 17px;
    color: var(--acp-text-muted);
    margin: 0;
    line-height: 1.6;
}
.acp-section--dark  .acp-section__subtitle,
.acp-section--brand .acp-section__subtitle { color: rgba(255,255,255,.65); }
.acp-section__footer {
    text-align: center;
    margin-top: 48px;
}

/* 按钮 */
.acp-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--acp-radius-sm);
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: background-color var(--acp-transition), transform 0.15s, box-shadow var(--acp-transition);
    cursor: pointer;
    border: none;
}
.acp-btn--primary {
    background: var(--acp-primary);
    color: #ffffff;
}
.acp-btn--primary:hover {
    background: var(--acp-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(232, 63, 30, .35);
    color: #ffffff;
}
.acp-btn--secondary {
    background: var(--acp-secondary);
    color: #ffffff;
}
.acp-btn--secondary:hover {
    background: var(--acp-secondary-hover);
    transform: translateY(-2px);
    color: #ffffff;
}
.acp-btn--outline {
    background: transparent;
    color: #ffffff;
    border: 2px solid rgba(255,255,255,.55);
}
.acp-btn--outline:hover {
    background: rgba(255,255,255,.12);
    border-color: #ffffff;
    color: #ffffff;
}
.acp-btn--outline-dark {
    background: transparent;
    color: var(--acp-secondary);
    border: 2px solid var(--acp-secondary);
}
.acp-btn--outline-dark:hover {
    background: var(--acp-secondary);
    color: #ffffff;
}
.acp-btn-arrow::after {
    content: '→';
    transition: transform var(--acp-transition);
}
.acp-btn-arrow:hover::after { transform: translateX(4px); }

/* 卡片 */
.acp-card {
    background: #ffffff;
    border-radius: var(--acp-radius);
    box-shadow: var(--acp-shadow);
    transition: transform var(--acp-transition), box-shadow var(--acp-transition);
    overflow: hidden;
}
.acp-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--acp-shadow-lg);
}

/* 淡入动画（Intersection Observer） */
.acp-fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity .55s ease, transform .55s ease;
}
.acp-fade-in.is-visible {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 768px) {
    .acp-section { padding: 56px 20px; }
    .acp-section__title { font-size: 28px; }
    .acp-section__subtitle { font-size: 15px; }
    .acp-section__header { margin-bottom: 36px; }
}