/* ============================================================
   FREEDOM 瑞度 官网 - 布局组件样式
   Header / Footer / Floating CTA / Breadcrumb
   ============================================================ */

/* ============================================================
   HEADER
   ============================================================ */
.site-header{
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: var(--z-header);
    background: rgba(251, 250, 248, 0.85);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid transparent;
    transition: background var(--dur-base) var(--ease-out), border-color var(--dur-base), padding var(--dur-base);
    padding: 14px 0;
}
.site-header.scrolled{
    background: rgba(251, 250, 248, 0.96);
    border-bottom-color: var(--color-gray-200);
    padding: 8px 0;
}
.site-header__inner{
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

/* LOGO */
.site-logo{
    display: inline-flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    flex-shrink: 0;
}
.site-logo img.icon{ height: 36px; width: 36px; transition: height var(--dur-base); }
.site-header.scrolled .site-logo img.icon{ height: 32px; }
.site-logo .lockup{ display: flex; flex-direction: column; line-height: 1; }
.site-logo .lockup .en{
    font-family: var(--font-sans-en);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: var(--ls-wider);
    color: var(--color-ink);
}
.site-logo .lockup .cn{
    font-size: 11px;
    letter-spacing: 0.4em;
    color: var(--color-gray-700);
    margin-top: 3px;
}

/* 导航 */
.main-nav{ display: flex; align-items: center; gap: 4px; }
.main-nav__item{ position: relative; }
.main-nav__link{
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 10px 16px;
    font-size: var(--fs-body-sm);
    font-weight: 500;
    color: var(--color-ink);
    border-radius: var(--radius-sm);
    transition: color var(--dur-fast), background var(--dur-fast);
    cursor: pointer;
    border: none;
    background: transparent;
}
.main-nav__link:hover,
.main-nav__link[aria-current="page"]{ color: var(--color-brand-red); background: var(--color-brand-red-l2); }
.main-nav__link .caret{ transition: transform var(--dur-fast); }
.main-nav__item.open .main-nav__link .caret{ transform: rotate(180deg); }

/* 高亮入口（代表案例） */
.main-nav__link--highlight{
    background: var(--color-brand-red);
    color: var(--color-white) !important;
    font-weight: 600;
    box-shadow: var(--shadow-red);
}
.main-nav__link--highlight:hover{ background: var(--color-brand-red-2); color: var(--color-white) !important; }
.main-nav__link--highlight[aria-current="page"]{ background: var(--color-ink); color: var(--color-white) !important; }

.main-nav__panel{
    position: absolute;
    top: calc(100% + 8px);
    left: 0;
    min-width: 240px;
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius);
    box-shadow: var(--shadow-3);
    padding: 8px;
    opacity: 0; visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--dur-fast) var(--ease-out);
}
.main-nav__item.open .main-nav__panel{
    opacity: 1; visibility: visible; transform: translateY(0);
}
.main-nav__panel a{
    display: block;
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-size: var(--fs-body-sm);
    color: var(--color-gray-700);
    transition: all var(--dur-fast);
}
.main-nav__panel a:hover{
    background: var(--color-brand-red-l);
    color: var(--color-brand-red);
    padding-left: 18px;
}
.main-nav__panel .desc{
    display: block;
    font-size: var(--fs-micro);
    color: var(--color-gray-500);
    margin-top: 2px;
}

/* 顶部右侧 */
.header-actions{ display: flex; align-items: center; gap: 12px; }
.header-cta{
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 18px;
    background: var(--color-ink);
    color: var(--color-white);
    border-radius: var(--radius-pill);
    font-size: var(--fs-caption);
    font-weight: 600;
    transition: background var(--dur-fast);
}
.header-cta:hover{ background: var(--color-brand-red); color: var(--color-white); }

.lang-switch{
    background: transparent;
    border: none;
    color: var(--color-gray-700);
    font-size: var(--fs-caption);
    font-weight: 600;
    padding: 8px 4px;
}

/* 移动端汉堡 */
.menu-toggle{
    display: none;
    width: 44px; height: 44px;
    background: transparent;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius-sm);
    align-items: center;
    justify-content: center;
}
.menu-toggle span{
    display: block;
    width: 18px; height: 2px;
    background: var(--color-ink);
    position: relative;
    transition: all var(--dur-fast);
}
.menu-toggle span::before, .menu-toggle span::after{
    content: "";
    position: absolute; left: 0;
    width: 18px; height: 2px;
    background: var(--color-ink);
    transition: all var(--dur-fast);
}
.menu-toggle span::before{ top: -6px; }
.menu-toggle span::after{ top: 6px; }
.menu-toggle[aria-expanded="true"] span{ background: transparent; }
.menu-toggle[aria-expanded="true"] span::before{ top: 0; transform: rotate(45deg); }
.menu-toggle[aria-expanded="true"] span::after{ top: 0; transform: rotate(-45deg); }

@media (max-width: 1024px){
    .main-nav{ display: none; }
    .menu-toggle{ display: inline-flex; }
    .header-cta{ display: none; }
}

/* 移动端抽屉 */
.mobile-drawer{
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: var(--color-paper);
    z-index: var(--z-modal);
    padding: 80px 24px 24px;
    overflow-y: auto;
    transform: translateX(100%);
    transition: transform var(--dur-base) var(--ease-out);
}
.mobile-drawer.open{ transform: translateX(0); }
.mobile-drawer__group{
    border-bottom: 1px solid var(--color-gray-200);
    padding: 16px 0;
}
.mobile-drawer__group h4{
    font-size: var(--fs-h4);
    margin: 0 0 8px;
    color: var(--color-brand-red);
}
.mobile-drawer__group a{
    display: block;
    padding: 10px 0;
    font-size: var(--fs-body-lg);
    color: var(--color-ink);
}
.mobile-drawer__close{
    position: absolute;
    top: 16px; right: 16px;
    background: transparent;
    border: none;
    font-size: 28px;
    line-height: 1;
}

/* ============================================================
   BREADCRUMB
   ============================================================ */
.breadcrumb{
    padding: 16px 0;
    border-bottom: 1px solid var(--color-gray-200);
    background: var(--color-paper);
}
.breadcrumb ol{
    list-style: none;
    margin: 0; padding: 0;
    display: flex; flex-wrap: wrap; align-items: center;
    gap: 8px;
    font-size: var(--fs-caption);
    color: var(--color-gray-500);
}
.breadcrumb li{ display: inline-flex; align-items: center; gap: 8px; }
.breadcrumb li:not(:last-child)::after{
    content: "/";
    color: var(--color-gray-300);
}
.breadcrumb a:hover{ color: var(--color-brand-red); }
.breadcrumb [aria-current="page"]{ color: var(--color-ink); font-weight: 500; }

/* ============================================================
   PAGE HEADER (内页顶部标题区)
   ============================================================ */
.page-header{
    padding: 140px 0 64px;
    background: var(--color-paper);
    position: relative;
    overflow: hidden;
}
.page-header::before{
    content: "";
    position: absolute;
    top: -100px; right: -100px;
    width: 400px; height: 400px;
    border-radius: 50%;
    background: var(--color-brand-red-l);
    opacity: .35;
    filter: blur(80px);
    z-index: 0;
}
.page-header__inner{ position: relative; z-index: 1; }
.page-header h1{ margin: 16px 0 20px; }
.page-header .lead{ max-width: 720px; color: var(--color-gray-700); font-size: var(--fs-body-lg); }

.page-header--dark{
    background: var(--color-black);
    color: var(--color-white);
}
.page-header--dark .page-header .lead{ color: rgba(255,255,255,0.8); }
.page-header--dark .t-eyebrow{ color: var(--color-brand-red); }

@media (max-width: 768px){
    .page-header{ padding: 110px 0 48px; }
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer{
    background: var(--color-black);
    color: rgba(255,255,255,0.7);
    padding: 80px 0 32px;
}
.site-footer a:hover{ color: var(--color-white); }

.footer-top{
    display: grid;
    grid-template-columns: 1.4fr repeat(3, 1fr);
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
@media (max-width: 960px){
    .footer-top{ grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 600px){
    .footer-top{ grid-template-columns: 1fr; }
}

.footer-brand__quote{
    font-family: var(--font-serif-en);
    font-style: italic;
    font-size: 1.25rem;
    color: var(--color-white);
    margin: 16px 0 24px;
    line-height: 1.4;
}
/* 官方域名标识：Brand 与 Inkwell 两词始终分开呈现，便于识别与记忆 */
.footer-brand__alias{
    display: inline-block;
    margin: -6px 0 20px;
    padding: 4px 13px;
    border-radius: var(--radius-pill);
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.16);
    font-family: var(--font-sans-en);
    font-size: var(--fs-caption);
    letter-spacing: 0.08em;
    color: rgba(255,255,255,0.88);
}
.footer-brand__contact{ font-size: var(--fs-caption); line-height: 1.8; }
.footer-brand__contact span{ display: block; }
.footer-brand__contact a{
    color: inherit; text-decoration: none;
    border-bottom: 1px solid rgba(255,255,255,0.3);
    transition: color var(--dur-fast), border-color var(--dur-fast);
}
.footer-brand__contact a:hover{ color: var(--color-brand-red-2); border-color: var(--color-brand-red-2); }
.filing-site{ font-weight: 600; }

.footer-col h5{
    color: var(--color-white);
    font-size: var(--fs-caption);
    letter-spacing: var(--ls-widest);
    text-transform: uppercase;
    margin: 0 0 16px;
}
.footer-col ul{ list-style: none; padding: 0; margin: 0; }
.footer-col li{ margin-bottom: 10px; font-size: var(--fs-body-sm); }
.footer-col a{ transition: color var(--dur-fast); }

.footer-bottom{
    margin-top: 32px;
    display: flex; flex-wrap: wrap; gap: 16px;
    justify-content: space-between;
    align-items: center;
    font-size: var(--fs-micro);
    color: rgba(255,255,255,0.4);
}
.footer-bottom .badges{ display: flex; gap: 12px; flex-wrap: wrap; }
.footer-bottom .badges span{
    padding: 4px 10px;
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: var(--radius-pill);
    font-size: var(--fs-micro);
    color: rgba(255,255,255,0.6);
}

/* 底部 Logo 反白 */
.footer-logo{
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
}
.footer-logo img{ height: 32px; width: 32px; filter: brightness(0) invert(1); }
.footer-logo .lockup .en{
    color: var(--color-white); font-weight: 700; font-size: 14px; letter-spacing: var(--ls-wider);
}
.footer-logo .lockup .cn{ color: rgba(255,255,255,0.6); font-size: 11px; letter-spacing: 0.4em; margin-top: 3px;}

/* ============================================================
   FLOATING CTA / 悬浮咨询按钮
   ============================================================ */
.floating-cta{
    position: fixed;
    bottom: 24px; right: 24px;
    z-index: var(--z-sticky);
    display: flex; flex-direction: column;
    gap: 12px;
    align-items: flex-end;
}
.floating-cta__item{
    width: 56px; height: 56px;
    border-radius: 50%;
    display: flex;
    align-items: center; justify-content: center;
    background: var(--color-white);
    box-shadow: var(--shadow-3);
    color: var(--color-ink);
    transition: transform var(--dur-base) var(--ease-out), background var(--dur-fast);
    position: relative;
}
.floating-cta__item:hover{ transform: scale(1.1); background: var(--color-brand-red); color: var(--color-white); }
.floating-cta__item svg{ width: 22px; height: 22px; }
.floating-cta__item--top{ background: var(--color-ink); color: var(--color-white); opacity: 0; pointer-events: none; transition: opacity var(--dur-base), transform var(--dur-base); }
.floating-cta__item--top.show{ opacity: 1; pointer-events: auto; }

.floating-cta__item[data-tooltip]:hover::after{
    content: attr(data-tooltip);
    position: absolute;
    right: 100%;
    top: 50%;
    transform: translateY(-50%);
    margin-right: 12px;
    padding: 6px 12px;
    background: var(--color-ink);
    color: var(--color-white);
    font-size: var(--fs-caption);
    white-space: nowrap;
    border-radius: var(--radius-sm);
    pointer-events: none;
}

/* 微信二维码浮窗 */
.qr-popup{
    position: fixed;
    bottom: 96px; right: 24px;
    z-index: var(--z-overlay);
    background: var(--color-white);
    padding: 16px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-3);
    text-align: center;
    opacity: 0;
    transform: translateY(8px);
    pointer-events: none;
    transition: all var(--dur-base) var(--ease-out);
}
.qr-popup.show{ opacity: 1; transform: translateY(0); pointer-events: auto; }
.qr-popup img{ width: 140px; height: 140px; }
.qr-popup p{ margin: 8px 0 0; font-size: var(--fs-caption); color: var(--color-gray-700); }

/* ============================================================
   CASE GRID / 案例展示
   ============================================================ */
.case-grid{
    display: grid;
    grid-template-columns: repeat(12, 1fr);
    gap: 24px;
}
.case-card{ grid-column: span 4; }
.case-card--wide{ grid-column: span 6; }
.case-card--tall{ grid-column: span 4; }
.case-card__cover{
    aspect-ratio: 4/3;
    background: linear-gradient(135deg, var(--color-brand-red-l) 0%, var(--color-brand-red) 100%);
    border-radius: var(--radius);
    overflow: hidden;
    position: relative;
    display: flex;
    align-items: center; justify-content: center;
}
.case-card__cover .placeholder{
    font-family: var(--font-serif-en);
    font-size: 5rem;
    color: rgba(255,255,255,0.45);
    font-weight: 700;
    text-align: center;
    line-height: 1;
    letter-spacing: -0.05em;
}
.case-card__meta{ padding: 16px 4px 0; }
.case-card__meta .cat{
    font-size: var(--fs-micro);
    letter-spacing: var(--ls-widest);
    text-transform: uppercase;
    color: var(--color-brand-red);
    font-weight: 600;
}
.case-card__meta h3{ margin: 4px 0 4px; font-size: var(--fs-h4); }
.case-card__meta .desc{ font-size: var(--fs-body-sm); color: var(--color-gray-500); }

/* 多图角标与详情引导（全站通用） */
.case-card__badge{
    position: absolute; top: 12px; right: 12px; z-index: 2;
    background: rgba(0,0,0,0.55); color: #fff;
    font-size: 12px; padding: 3px 10px; border-radius: 999px; letter-spacing: 0.02em;
}
.case-card__more{
    display: inline-block; margin-top: 12px;
    font-size: var(--fs-caption); color: var(--color-brand-red); font-weight: 600;
    opacity: 0; transform: translateX(-4px);
    transition: opacity .3s var(--ease-out), transform .3s var(--ease-out);
}
.case-card:hover .case-card__more{ opacity: 1; transform: translateX(0); }

@media (max-width: 768px){
    .case-card, .case-card--wide, .case-card--tall{ grid-column: span 12; }
}

/* ============================================================
   MARQUEE 跑马灯
   ============================================================ */
.marquee{
    overflow: hidden;
    position: relative;
    width: 100%;
}
.marquee__track{
    display: flex;
    width: max-content;
    animation: marquee 40s linear infinite;
}
.marquee:hover .marquee__track{ animation-play-state: paused; }
.marquee__item{
    flex-shrink: 0;
    padding: 0 48px;
    font-family: var(--font-serif-en);
    font-style: italic;
    font-size: clamp(2rem, 6vw, 5rem);
    color: var(--color-ink);
    line-height: 1.1;
    white-space: nowrap;
}
.marquee__item .accent{ color: var(--color-brand-red); }