/* ============================================================
   Shopify 风格主题 - 组件类
   所有组件加 .sf- 前缀，与 Bootstrap 默认类并存
   通过 .sf-* 包裹类提升优先级，避免污染 .btn / .form-control
   ============================================================ */

/* 覆盖 common.css 给 html 的浅灰背景，全站统一白色 */
html { background: var(--sf-bg) !important; }
[data-theme="dark"] html { background: var(--sf-bg) !important; }

/* ============== 全站顶部促销广告条 ============== */
.sf-promo-bar {
    background: linear-gradient(90deg, #c8102e 0%, #e8233a 50%, #c8102e 100%);
    color: #fff;
    text-align: center;
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: 0.3px;
    line-height: 1.4;
    position: relative;
    z-index: 1001;
    box-shadow: 0 1px 4px rgba(0,0,0,0.12);
}

/* 顶部容器 sticky：导航 + 促销条整体固定在视口顶部 */
.sf-sticky-top {
    position: -webkit-sticky;
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--sf-bg);
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}
.sf-promo-bar .sf-promo-text { display: inline-block; max-width: 100%; }
.sf-promo-bar code {
    background: rgba(255,255,255,0.22);
    color: #fff;
    padding: 2px 8px;
    border-radius: 3px;
    font-weight: 700;
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    margin: 0 2px;
    letter-spacing: 0.5px;
    border: 1px solid rgba(255,255,255,0.3);
}
@media (max-width: 768px) {
    .sf-promo-bar { font-size: 11.5px; padding: 6px 12px; }
}

/* ============== Header 顶部导航 - Shopify 两行风格 ============== */
/* Row1 黑色（logo+搜索+4图标），Row2 白色（导航菜单） */
.sf-header { background: var(--sf-bg); border-bottom: 1px solid var(--sf-border-soft); position: sticky; top: 0; z-index: 1100; box-shadow: var(--sf-shadow-sm); }

/* ---- Row 1 ---- */
.sf-header-top { background: var(--sf-text); color: #fff; padding: 12px 0; }
[data-theme="dark"] .sf-header-top { background: #000; }

.sf-header-top-inner { display: flex; align-items: center; gap: var(--sf-space-lg); max-width: var(--sf-container); margin: 0 auto; padding: 0 var(--sf-space-md); }

/* Logo - Shopify 衬线优雅风（Playfair Display） */
.sf-header-logo { flex-shrink: 0; display: flex; align-items: center; text-decoration: none; }
.sf-header-logo-text {
    color: #fff;
    font-weight: 700;
    font-size: 28px;
    letter-spacing: 8px;
    line-height: 1;
    text-transform: uppercase;
    font-family: "Playfair Display", "Cormorant Garamond", Georgia, "Times New Roman", serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}
[data-theme="dark"] .sf-header-logo-text { color: #fff; }

/* Search - 占据中间剩余空间 */
.sf-header-search { flex: 1; max-width: 600px; position: relative; }
.sf-header-search form { display: flex; width: 100%; }
.sf-header-search input.sf-search-input {
    flex: 1; height: 40px; padding: 0 16px;
    background: #fff; color: var(--sf-text);
    border: 1px solid #fff; border-right: none;
    border-radius: var(--sf-radius-pill) 0 0 var(--sf-radius-pill);
    font-size: var(--sf-font-size-base); outline: none;
}
.sf-header-search input.sf-search-input::placeholder { color: var(--sf-text-muted); }
.sf-header-search button.sf-search-btn {
    width: 50px; height: 40px;
    background: var(--sf-badge-sale); color: #fff;
    border: none; border-radius: 0 var(--sf-radius-pill) var(--sf-radius-pill) 0;
    cursor: pointer; font-size: 16px; transition: background var(--sf-transition);
}
.sf-header-search button.sf-search-btn:hover { background: #d93640; }

/* Shop All dropdown - 独立模块，搜索框左侧 */
.sf-shopall-dropdown { position: relative; flex-shrink: 0; margin-right: 8px; }
.sf-shopall-btn {
    height: 40px;
    padding: 0 16px;
    background: #DE3942;
    color: #fff;
    border: 1px solid #DE3942;
    border-radius: var(--sf-radius-pill);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: var(--sf-font-size-sm);
    font-weight: 600;
    font-family: var(--sf-font);
    transition: background var(--sf-transition), box-shadow var(--sf-transition);
    box-shadow: 0 2px 6px rgba(222,57,66,0.3);
}
.sf-shopall-btn:hover {
    background: #b62d35;
    border-color: #b62d35;
    color: #fff;
}
.sf-shopall-btn .fa-th { font-size: 14px; }
.sf-shopall-btn .fa-angle-down { font-size: 12px; transition: transform 0.2s; opacity: 0.9; }
.sf-shopall-dropdown.open .sf-shopall-btn .fa-angle-down { transform: rotate(180deg); }

/* 下拉面板：网格布局展示分类 */
.sf-shopall-menu {
    position: absolute;
    top: calc(100% + 6px);
    left: 0;
    min-width: 320px;
    background: #fff;
    border: 1px solid var(--sf-border-soft);
    border-radius: var(--sf-radius);
    box-shadow: 0 6px 24px rgba(0,0,0,0.12);
    padding: 8px;
    z-index: 200;
    display: none;
    max-height: 70vh;
    overflow-y: auto;
}
.sf-shopall-dropdown.open .sf-shopall-menu { display: block; animation: sfShopAllFade 0.18s ease; }
@keyframes sfShopAllFade {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}
.sf-shopall-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2px;
}
@media (max-width: 480px) {
    .sf-shopall-grid { grid-template-columns: 1fr; }
    .sf-shopall-menu { right: 0; left: 0; min-width: 0; }
}
.sf-shopall-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 9px 12px;
    color: var(--sf-text);
    font-size: var(--sf-font-size-sm);
    border-radius: var(--sf-radius-sm);
    text-decoration: none !important;
    transition: background 0.15s, color 0.15s;
}
.sf-shopall-parent { font-weight: 600; }
.sf-shopall-sub {
    padding: 6px 12px 6px 24px;
    font-size: var(--sf-font-size-xs);
    color: var(--sf-text-muted);
    font-weight: 400;
}
.sf-shopall-sub:hover { color: var(--sf-text); }
.sf-shopall-item:hover {
    background: var(--sf-bg-alt);
    color: var(--sf-text);
}
.sf-shopall-item .fa-angle-right {
    color: var(--sf-text-muted);
    font-size: 12px;
    opacity: 0;
    transition: opacity 0.15s, transform 0.15s;
}
.sf-shopall-item:hover .fa-angle-right {
    opacity: 1;
    transform: translateX(2px);
}
[data-theme="dark"] .sf-shopall-menu { background: #2a2a2a; border-color: #444; }
[data-theme="dark"] .sf-shopall-item { color: #eee; }
[data-theme="dark"] .sf-shopall-item:hover { background: #3a3a3a; color: #fff; }

/* 移动端：Shop All 单独一行 */
@media (max-width: 992px) {
    .sf-shopall-dropdown { margin-right: 0; margin-bottom: 8px; order: 2; }
}

/* Right action icons */
.sf-header-actions { display: flex; align-items: center; gap: 4px; flex-shrink: 0; }

/* 单个图标按钮 - 白色文字（黑底） */
.sf-action-btn {
    display: inline-flex; align-items: center; gap: 8px;
    height: 44px; padding: 0 14px;
    color: #fff; background: transparent;
    border: 1px solid transparent; border-radius: var(--sf-radius-sm);
    font-size: var(--sf-font-size-sm); font-weight: 500;
    cursor: pointer; text-decoration: none !important;
    transition: background var(--sf-transition); position: relative;
    font-family: var(--sf-font);
}
.sf-action-btn:hover { background: rgba(255,255,255,0.12); color: #fff; }
.sf-action-btn i { font-size: 20px; line-height: 1; }
.sf-action-btn .label { white-space: nowrap; font-size: var(--sf-font-size-sm); }
@media (max-width: 992px) { .sf-action-btn .label { display: none; } .sf-action-btn { padding: 0 10px; gap: 0; } }

/* Cart with badge */
.sf-action-btn.sf-cart-btn { position: relative; }
.sf-action-btn.sf-cart-btn .cart-badge {
    position: absolute; top: -2px; right: -2px;
    background: var(--sf-badge-sale); color: #fff;
    font-size: 11px; font-weight: 700;
    min-width: 20px; height: 20px; padding: 0 5px;
    border-radius: var(--sf-radius-pill);
    display: inline-flex; align-items: center; justify-content: center;
    border: 2px solid var(--sf-text);
    line-height: 1;
}

/* Region dropdown */
.sf-region-dropdown { position: relative; }
.sf-region-dropdown .sf-dropdown-menu {
    position: absolute; top: calc(100% + 6px); right: 0;
    background: var(--sf-bg); color: var(--sf-text);
    border: 1px solid var(--sf-border); border-radius: var(--sf-radius);
    box-shadow: var(--sf-shadow-md); min-width: 160px;
    padding: 6px 0; display: none; z-index: 200;
}
.sf-region-dropdown.open .sf-dropdown-menu { display: block; }
.sf-region-dropdown .sf-dropdown-menu a {
    display: flex; align-items: center; gap: 8px;
    padding: 8px 14px; color: var(--sf-text);
    font-size: var(--sf-font-size-sm); text-decoration: none;
}
.sf-region-dropdown .sf-dropdown-menu a:hover { background: var(--sf-bg-alt); color: var(--sf-text); }
.sf-region-dropdown .sf-dropdown-menu a.active { background: var(--sf-bg-alt); font-weight: 600; }
.sf-region-dropdown .sf-dropdown-menu .currency-code { font-weight: 600; min-width: 32px; }
.sf-region-dropdown .sf-dropdown-menu .currency-symbol { color: var(--sf-text-muted); }

/* Dark Mode toggle - icon swaps based on theme */
.sf-action-btn.sf-theme-toggle .sf-icon-sun { display: none; }
.sf-action-btn.sf-theme-toggle .sf-icon-moon { display: inline; }
[data-theme="dark"] .sf-action-btn.sf-theme-toggle .sf-icon-sun { display: inline; }
[data-theme="dark"] .sf-action-btn.sf-theme-toggle .sf-icon-moon { display: none; }

/* ---- Row 2 - Navigation ---- */
.sf-header-nav { background: var(--sf-bg); border-bottom: 1px solid var(--sf-border-soft); }
.sf-header-nav-inner {
    display: flex; align-items: center; justify-content: center; gap: var(--sf-space-xs);
    max-width: var(--sf-container); margin: 0 auto; padding: 0 var(--sf-space-md);
    overflow: visible; white-space: nowrap;
}

.sf-nav-link {
    display: inline-flex; align-items: center;
    padding: 12px 14px;
    color: var(--sf-text); background: transparent;
    font-size: 16px; font-weight: 700;
    text-decoration: none; border-bottom: 2px solid transparent;
    transition: all var(--sf-transition); white-space: nowrap;
}
.sf-nav-link:hover { color: var(--sf-text-muted); border-bottom-color: var(--sf-text); }
.sf-nav-link.active { color: var(--sf-text); border-bottom-color: var(--sf-text); }
.sf-nav-link i { margin-right: 6px; font-size: 12px; }

/* === shop:menu 输出 <ul class="sf-nav"><li><a> 兼容 === */
.sf-header-nav-inner > ul.sf-nav { list-style: none; margin: 0; padding: 0; display: flex; align-items: center; justify-content: center; }
.sf-header-nav-inner > ul.sf-nav > li { list-style: none; position: relative; }
.sf-header-nav-inner > ul.sf-nav > li > a,
.sf-header-nav-inner > ul.sf-nav > li > a:focus,
.sf-header-nav-inner > ul.sf-nav > li > a:hover {
    display: inline-flex; align-items: center;
    padding: 12px 14px;
    color: var(--sf-text); background: transparent !important;
    font-size: 16px; font-weight: 700;
    text-decoration: none; border-bottom: 2px solid transparent;
    transition: all var(--sf-transition); white-space: nowrap;
}
.sf-header-nav-inner > ul.sf-nav > li > a:hover,
.sf-header-nav-inner > ul.sf-nav > li.active > a,
.sf-header-nav-inner > ul.sf-nav > li.selected > a {
    color: var(--sf-text-muted); border-bottom-color: var(--sf-text); background: transparent !important;
}
.sf-header-nav-inner > ul.sf-nav li .indicator { margin-left: 6px; font-size: 12px; opacity: 0.7; }

/* Policy 等下拉子菜单 —— 默认隐藏，hover 或 Bootstrap .open 时显示 */
.sf-header-nav-inner > ul.sf-nav li > .dropdown-menu {
    display: none;
    position: absolute;
    top: 100%; left: 0;
    background: var(--sf-bg);
    border: 1px solid var(--sf-border);
    border-radius: var(--sf-radius);
    box-shadow: var(--sf-shadow-md);
    min-width: 260px;
    padding: 6px 0;
    margin: 0;
    list-style: none;
    z-index: 2000;
}
.sf-header-nav-inner > ul.sf-nav li:hover > .dropdown-menu,
.sf-header-nav-inner > ul.sf-nav li.open > .dropdown-menu {
    display: block;
}
.sf-header-nav-inner > ul.sf-nav li .dropdown-menu > li > a {
    display: block;
    padding: 10px 18px;
    color: var(--sf-text);
    font-size: 14px; font-weight: 500;
    border-bottom: none;
    white-space: nowrap;
}
.sf-header-nav-inner > ul.sf-nav li .dropdown-menu > li > a:hover {
    background: var(--sf-bg-alt); color: var(--sf-text);
}
.sf-header-nav-inner li.dropdown-submenu > .dropdown-menu { left: 100%; top: 0; margin-left: -1px; }

/* Header mobile */
@media (max-width: 768px) {
    .sf-header-top-inner { flex-wrap: wrap; gap: var(--sf-space-sm); padding: 0 var(--sf-space-sm); }
    .sf-header-search { order: 3; flex: 1 1 100%; max-width: 100%; }
    .sf-header-logo-text { font-size: 22px; letter-spacing: 4px; }
    .sf-action-btn { padding: 0 8px; height: 36px; }
    .sf-action-btn i { font-size: 16px; }
    .sf-header-search input.sf-search-input { height: 36px; }
    .sf-header-search button.sf-search-btn { width: 44px; height: 36px; }
    .sf-nav-link { padding: 12px 14px; font-size: 15px; }
    .sf-header-nav-inner > ul.sf-nav > li > a { padding: 12px 14px; font-size: 15px; }
    /* 移动端：取消 hover 触发，避免触屏一滑就展开；改用 Bootstrap click .open */
    .sf-header-nav-inner > ul.sf-nav li:hover > .dropdown-menu { display: none; }
    .sf-header-nav-inner > ul.sf-nav li.open > .dropdown-menu { display: block; }
    .sf-header-nav-inner > ul.sf-nav li > .dropdown-menu { position: static; box-shadow: none; border: none; min-width: 0; padding: 0 0 0 12px; }
}

/* 兼容原 .header-header / .header-menu 旧规则 — 隐藏 */
.sf-header .header-header { display: none; }
.sf-header .header-menu { display: none; }

/* ============ 单页（About Us / Privacy / Refund 等）Shopify 风格 ============ */
.sf-page {
    max-width: 880px;
    margin: 0 auto;
    padding: 48px 24px 96px;
}
.sf-page-hero {
    text-align: left;
    margin-bottom: 48px;
    padding-bottom: 32px;
    border-bottom: 1px solid var(--sf-border-soft);
}
.sf-page-hero .sf-breadcrumb {
    font-size: 13px;
    color: var(--sf-text-muted);
    margin-bottom: 16px;
    letter-spacing: 0.3px;
}
.sf-page-hero .sf-breadcrumb a {
    color: var(--sf-text-muted);
    text-decoration: none;
}
.sf-page-hero .sf-breadcrumb a:hover { color: var(--sf-text); text-decoration: underline; }
.sf-page-hero .sf-breadcrumb .separator { margin: 0 8px; opacity: 0.5; }
.sf-page-hero .sf-breadcrumb .current { color: var(--sf-text); }
.sf-page-hero-title {
    font-size: 44px;
    font-weight: 800;
    letter-spacing: 1px;
    line-height: 1.2;
    margin: 0;
    color: var(--sf-text);
}

.sf-page-article {
    font-size: 16px;
    line-height: 1.8;
    color: var(--sf-text);
}
.sf-page-article > *:first-child { margin-top: 0; }
.sf-page-article h2 {
    font-size: 28px; font-weight: 700; line-height: 1.3;
    margin: 40px 0 16px;
    color: var(--sf-text);
}
.sf-page-article h3 {
    font-size: 20px; font-weight: 700; line-height: 1.4;
    margin: 28px 0 12px;
    color: var(--sf-text);
}
.sf-page-article p {
    margin: 0 0 16px;
    font-size: 16px !important;
    line-height: 1.8 !important;
    text-indent: 0 !important;
    text-align: left !important;
    font-family: inherit !important;
    color: var(--sf-text);
}
.sf-page-article strong { font-weight: 700; color: var(--sf-text); }
.sf-page-article ul, .sf-page-article ol {
    margin: 0 0 20px;
    padding-left: 24px;
}
.sf-page-article ul li, .sf-page-article ol li {
    margin-bottom: 10px;
    line-height: 1.7;
}
.sf-page-article ul li strong { color: var(--sf-text); }
.sf-page-article img {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 24px auto;
    border-radius: var(--sf-radius);
}
.sf-page-article a {
    color: var(--sf-text);
    text-decoration: underline;
}

/* 桌面端紧凑 */
@media (max-width: 768px) {
    .sf-page { padding: 32px 16px 64px; }
    .sf-page-hero { margin-bottom: 32px; padding-bottom: 24px; }
    .sf-page-hero-title { font-size: 32px; }
    .sf-page-article { font-size: 15px; }
    .sf-page-article h2 { font-size: 22px; }
    .sf-page-article h3 { font-size: 18px; }
}

/* ============ Contact Us 页面 - 左右两栏 ============ */
/* 无 Hero 模式：紧凑 padding，单行面包屑 */
.sf-page-nohero { padding-top: 16px !important; padding-bottom: 48px !important; }
.sf-breadcrumb-inline {
    font-size: 13px;
    color: var(--sf-text-muted);
    padding: 8px 0 16px;
    border-bottom: 1px solid var(--sf-border-soft);
    margin-bottom: 24px;
}
.sf-breadcrumb-inline a { color: var(--sf-text-muted); text-decoration: none; }
.sf-breadcrumb-inline a:hover { color: var(--sf-text); text-decoration: underline; }
.sf-breadcrumb-inline .separator { margin: 0 8px; opacity: 0.5; }
.sf-breadcrumb-inline .current { color: var(--sf-text); }

.sf-contact-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
    min-height: 480px;
    padding: 8px 0;
}

/* 左栏：标题 + 介绍 + 邮箱 + 在线聊天按钮 */
.sf-contact-left { padding-right: 16px; }
.sf-contact-title {
    font-size: 30px;
    font-weight: 800;
    margin: 0 0 8px;
    color: var(--sf-text);
    line-height: 1.2;
}
.sf-contact-subtitle {
    font-size: 16px;
    color: var(--sf-text);
    font-weight: 500;
    margin: 0 0 16px;
}
.sf-contact-intro {
    font-size: 15px;
    color: var(--sf-text-muted);
    line-height: 1.7;
    margin: 0 0 24px;
}
.sf-contact-email-box {
    background: #fafafa;
    border-radius: var(--sf-radius);
    padding: 16px 20px;
    margin-bottom: 24px;
    border: 1px solid var(--sf-border-soft);
}
.sf-contact-email-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 6px 0;
}
.sf-contact-email-row + .sf-contact-email-row { border-top: 1px solid var(--sf-border-soft); margin-top: 4px; padding-top: 10px; }
.sf-contact-email-row > i {
    width: 36px; height: 36px;
    background: #fff5f5; color: #c8102e;
    border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 16px;
    flex-shrink: 0;
}
.sf-contact-email-row .label {
    display: block;
    font-size: 12px;
    color: var(--sf-text-muted);
    letter-spacing: 0.5px;
    text-transform: uppercase;
}
.sf-contact-email-row a,
.sf-contact-email-row .value {
    display: block;
    font-size: 15px;
    font-weight: 700;
    color: var(--sf-text);
    text-decoration: none;
    margin-top: 2px;
}
.sf-contact-email-row a:hover { text-decoration: underline; }

.sf-contact-chat-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 700;
    background: #DA1B35 !important;
    color: #fff !important;
    border: none !important;
    border-radius: var(--sf-radius);
    text-decoration: none;
    cursor: pointer;
    transition: background 0.2s ease;
}
.sf-contact-chat-btn:hover { background: #B8142A !important; color: #fff !important; text-decoration: none; }
.sf-contact-chat-note {
    margin: 10px 0 0;
    font-size: 13px;
    color: var(--sf-text-muted);
}

/* 右栏：3 个特性卡 垂直堆叠 */
.sf-contact-right {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.sf-contact-feature {
    display: flex;
    align-items: center;
    gap: 18px;
    padding: 20px 24px;
    border: 1px solid var(--sf-border-soft);
    border-radius: var(--sf-radius);
    background: var(--sf-bg-card);
    text-align: left;
}
.sf-contact-feature-icon {
    width: 56px; height: 56px;
    flex-shrink: 0;
    border-radius: 50%;
    background: #fff5f5;
    color: #c8102e;
    display: flex; align-items: center; justify-content: center;
    font-size: 24px;
}
.sf-contact-feature-body h3 {
    font-size: 17px;
    font-weight: 700;
    margin: 0 0 4px;
    color: var(--sf-text);
}
.sf-contact-feature-body p {
    font-size: 14px;
    color: var(--sf-text-muted);
    line-height: 1.5;
    margin: 0;
}

@media (max-width: 900px) {
    .sf-contact-layout { grid-template-columns: 1fr; gap: 32px; }
    .sf-contact-left { padding-right: 0; }
}

/* ============ Legacy 兼容区（被新 header 取代） ============ */
/* 老的 .sf-nav / .sf-icon-btn 保留以防其他页面引用 */
.sf-nav { display: flex; align-items: center; gap: var(--sf-space-md); list-style: none; margin: 0; padding: 0; }
.sf-icon-btn { display: inline-flex; align-items: center; justify-content: center; width: 40px; height: 40px; border-radius: var(--sf-radius-pill); color: var(--sf-text); background: transparent; border: none; cursor: pointer; transition: background var(--sf-transition); position: relative; }
.sf-icon-btn:hover { background: var(--sf-bg-alt); }
.sf-icon-btn .badge { position: absolute; top: 0; right: 0; background: var(--sf-badge-sale); color: #fff; font-size: 10px; min-width: 18px; height: 18px; border-radius: var(--sf-radius-pill); display: inline-flex; align-items: center; justify-content: center; padding: 0 5px; }

/* ============== Footer 页脚 ============== */
.sf-footer { background: var(--sf-bg); border-top: 1px solid var(--sf-border-soft); padding: var(--sf-space-2xl) 0 var(--sf-space-lg); margin-top: var(--sf-space-2xl); }
.sf-footer-cols { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sf-space-xl); margin-bottom: var(--sf-space-xl); }
.sf-footer-col h4 { font-size: var(--sf-font-size-md); margin-bottom: var(--sf-space-md); font-weight: 600; }
.sf-footer-col ul { list-style: none; padding: 0; margin: 0; }
.sf-footer-col li { margin-bottom: var(--sf-space-sm); }
.sf-footer-col a { color: var(--sf-text-muted); font-size: var(--sf-font-size-base); }
.sf-footer-col a:hover { color: var(--sf-text); }
.sf-footer-bottom { padding-top: var(--sf-space-lg); border-top: 1px solid var(--sf-border-soft); display: flex; justify-content: space-between; align-items: center; color: var(--sf-text-muted); font-size: var(--sf-font-size-sm); }

@media (max-width: 768px) {
    .sf-footer-cols { grid-template-columns: repeat(2, 1fr); gap: var(--sf-space-lg); }
}

/* ============== Button 按钮 ============== */
.sf-btn { display: inline-flex; align-items: center; justify-content: center; gap: var(--sf-space-sm); padding: 12px 24px; font-size: var(--sf-font-size-base); font-weight: 500; border-radius: var(--sf-radius-sm); border: 1px solid transparent; cursor: pointer; transition: all var(--sf-transition); text-decoration: none; line-height: 1.4; }
.sf-btn-primary { background: var(--sf-accent); color: #fff; border-color: var(--sf-accent); }
.sf-btn-primary:hover { background: var(--sf-accent-hover); color: #fff; border-color: var(--sf-accent-hover); }
.sf-btn-secondary { background: transparent; color: var(--sf-text); border-color: var(--sf-border); }
.sf-btn-secondary:hover { background: var(--sf-bg-alt); color: var(--sf-text); }
.sf-btn-block { width: 100%; }
.sf-btn-lg { padding: 16px 32px; font-size: var(--sf-font-size-md); }
.sf-btn-sm { padding: 8px 16px; font-size: var(--sf-font-size-sm); }

/* ============== Product Card 商品卡片 ============== */
.sf-product-card { display: block; background: var(--sf-bg-card); border-radius: var(--sf-radius); overflow: hidden; transition: box-shadow var(--sf-transition); position: relative; text-decoration: none; color: var(--sf-text); }
.sf-product-card:hover { box-shadow: var(--sf-shadow-md); color: var(--sf-text); }
.sf-product-card-image { position: relative; width: 100%; aspect-ratio: 1 / 1; background: var(--sf-bg-alt); overflow: hidden; }
.sf-product-card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform var(--sf-transition-slow); }
.sf-product-card:hover .sf-product-card-image img { transform: scale(1.05); }
.sf-product-card-body { padding: var(--sf-space-md); }
.sf-product-card-title { font-size: var(--sf-font-size-base); font-weight: 500; line-height: 1.4; margin: 0 0 var(--sf-space-sm); color: var(--sf-text); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; min-height: 42px; }
.sf-product-card-price { display: flex; align-items: center; gap: var(--sf-space-sm); flex-wrap: wrap; }
.sf-product-card-price .price { font-size: var(--sf-font-size-md); font-weight: 600; color: var(--sf-price); }
.sf-product-card-price .marketprice { font-size: var(--sf-font-size-sm); color: var(--sf-price-old); text-decoration: line-through; }
.sf-product-card-variants { font-size: var(--sf-font-size-xs); color: var(--sf-text-muted); margin-top: 4px; }

/* ============== Badge 角标 ============== */
.sf-badge { position: absolute; top: var(--sf-space-sm); left: var(--sf-space-sm); z-index: 2; padding: 4px 10px; font-size: 11px; font-weight: 600; letter-spacing: 0.5px; text-transform: uppercase; border-radius: var(--sf-radius-pill); color: #fff; }
.sf-badge-hot { background: var(--sf-badge-hot); }
.sf-badge-new { background: var(--sf-badge-new); }
.sf-badge-sale { background: var(--sf-badge-sale); }

/* ============== Grid 商品网格 ============== */
.sf-grid { display: grid; gap: var(--sf-space-md); }
.sf-grid--4col { grid-template-columns: repeat(4, 1fr); }
.sf-grid--3col { grid-template-columns: repeat(3, 1fr); }
.sf-grid--2col { grid-template-columns: repeat(2, 1fr); }
@media (max-width: 992px) {
    .sf-grid--4col { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 768px) {
    .sf-grid--4col, .sf-grid--3col { grid-template-columns: repeat(2, 1fr); gap: var(--sf-space-sm); }
}

/* ============== Hero Banner 首页焦点图 ============== */
.sf-hero { position: relative; width: 100%; overflow: hidden; border-radius: 0; margin-bottom: var(--sf-space-xl); }
.sf-hero img { width: 100%; height: 100%; object-fit: cover; }
.sf-hero-content { position: absolute; inset: 0; display: flex; flex-direction: column; justify-content: center; align-items: flex-start; padding: var(--sf-space-2xl); color: #fff; background: linear-gradient(90deg, rgba(0,0,0,0.4) 0%, rgba(0,0,0,0.1) 60%, transparent 100%); }
.sf-hero-title { font-size: var(--sf-font-size-3xl); font-weight: 700; margin-bottom: var(--sf-space-md); text-shadow: 0 2px 8px rgba(0,0,0,0.3); }
.sf-hero-subtitle { font-size: var(--sf-font-size-lg); margin-bottom: var(--sf-space-lg); opacity: 0.95; }
.sf-hero .sf-btn { background: #fff; color: var(--sf-text); border-color: #fff; }
.sf-hero .sf-btn:hover { background: var(--sf-bg-alt); }

/* ============== 首页大轮播图 ============== */
.sf-hero-carousel {
    position: relative;
    width: 100%;
    margin-bottom: var(--sf-space-xl);
    overflow: hidden;
    border-radius: var(--sf-radius);
    box-shadow: 0 4px 16px rgba(0,0,0,0.06);
}
.sf-hero-carousel .swiper-wrapper { }
.sf-hero-carousel .swiper-slide {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 7;
    max-height: 560px;
    min-height: 320px;
}
.sf-hero-large {
    display: block;
    position: relative;
    width: 100%;
    height: 100%;
    color: inherit;
    text-decoration: none;
}
.sf-hero-large img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}
.sf-hero-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: var(--sf-space-3xl);
    color: #fff;
    background: linear-gradient(90deg, rgba(0,0,0,0.5) 0%, rgba(0,0,0,0.2) 50%, transparent 100%);
}
.sf-hero-large-title {
    font-size: clamp(28px, 4vw, 52px);
    font-weight: 700;
    margin: 0 0 var(--sf-space-sm);
    text-shadow: 0 2px 12px rgba(0,0,0,0.4);
    max-width: 50%;
    line-height: 1.1;
}
.sf-hero-large-subtitle {
    font-size: clamp(14px, 1.5vw, 18px);
    margin: 0 0 var(--sf-space-lg);
    opacity: 0.95;
    max-width: 45%;
    text-shadow: 0 1px 6px rgba(0,0,0,0.4);
}
.sf-hero-carousel .swiper-pagination-bullet { background: #fff; opacity: 0.6; }
.sf-hero-carousel .swiper-pagination-bullet-active { opacity: 1; background: var(--sf-text); }
.sf-hero-carousel .swiper-button-prev,
.sf-hero-carousel .swiper-button-next {
    color: #fff;
    background: rgba(0,0,0,0.25);
    width: 44px; height: 44px;
    border-radius: 50%;
    backdrop-filter: blur(4px);
}
.sf-hero-carousel .swiper-button-prev:after,
.sf-hero-carousel .swiper-button-next:after { font-size: 18px; font-weight: 700; }
@media (max-width: 768px) {
    .sf-hero-carousel .swiper-slide { aspect-ratio: 4 / 3; }
    .sf-hero-overlay { padding: var(--sf-space-md); }
    .sf-hero-carousel .swiper-button-prev,
    .sf-hero-carousel .swiper-button-next { display: none; }
}

/* Hero 卡片网格（一行 N 列，桌面 3 列 / 平板 2 列 / 手机 1 列） */
.sf-hero-row {
    display: grid;
    grid-template-columns: repeat(3, 720px);
    gap: var(--sf-space-md);
    margin-bottom: var(--sf-space-xl);
    justify-content: center;
    /* 突破 .sf-container 1280px 限制：让 hero 行用满视口宽度 */
    width: 100vw;
    margin-left: calc(-50vw + 50%);
    margin-right: calc(-50vw + 50%);
    padding-left: var(--sf-space-md);
    padding-right: var(--sf-space-md);
    box-sizing: border-box;
}
.sf-hero-row:empty { display: none; }
@media (max-width: 2240px) {
    .sf-hero-row { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}
@media (max-width: 1500px) {
    .sf-hero-row { grid-template-columns: repeat(3, minmax(0, 1fr)); max-width: 1280px; width: auto; margin-left: auto; margin-right: auto; padding-left: 0; padding-right: 0; }
}
@media (max-width: 992px) {
    .sf-hero-row { grid-template-columns: repeat(2, minmax(0, 1fr)); max-width: 720px; }
}
@media (max-width: 600px) {
    .sf-hero-row { grid-template-columns: 1fr; max-width: 720px; }
}
/* 列表页 hero 行（在页面顶部，对齐容器宽度，不突破容器） */
.sf-list-hero-row {
    width: auto !important;
    margin-left: 0 !important;
    margin-right: 0 !important;
    padding-left: 0 !important;
    padding-right: 0 !important;
    grid-template-columns: repeat(3, minmax(0, 1fr)) !important;
    margin-bottom: var(--sf-space-xl);
}

.sf-hero-card {
    display: block;
    position: relative;
    width: 720px;
    max-width: 100%;
    aspect-ratio: 720 / 390;
    overflow: hidden;
    border-radius: var(--sf-radius);
    margin-bottom: 0;
    color: inherit;
    text-decoration: none;
    transition: transform .25s ease, box-shadow .25s ease;
}
.sf-hero-card:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,.12); }
.sf-hero-card:hover .sf-btn { background: var(--sf-bg-alt) !important; }
@media (max-width: 1500px) {
    .sf-hero-card { width: 100%; }
}
.sf-hero-card .sf-hero-content { padding: var(--sf-space-lg); }
.sf-hero-card .sf-hero-title { font-size: var(--sf-font-size-lg); margin-bottom: 6px; }
.sf-hero-card .sf-hero-subtitle { font-size: var(--sf-font-size-sm); margin-bottom: var(--sf-space-sm); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.sf-hero-card .sf-btn { padding: 6px 14px; font-size: var(--sf-font-size-sm); }
@media (max-width: 768px) {
    .sf-hero-card .sf-hero-content { padding: var(--sf-space-md); }
    .sf-hero-card .sf-hero-title { font-size: var(--sf-font-size-md); }
}

/* ============== List Page Sidebar Filter ============== */
.sf-list-page { max-width: 1440px; margin: 0 auto; }
.sf-list-layout {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    gap: var(--sf-space-xl);
    align-items: start;
}
@media (max-width: 768px) {
    .sf-list-layout { grid-template-columns: 1fr; gap: var(--sf-space-md); }
}

.sf-filter-sidebar {
    background: var(--sf-bg);
    border: 1px solid var(--sf-border-soft);
    border-radius: var(--sf-radius);
    padding: 12px 4px 16px;
    position: sticky;
    top: 16px;
    max-height: calc(100vh - 32px);
    overflow-y: auto;
}
@media (max-width: 768px) {
    .sf-filter-sidebar {
        position: fixed;
        top: 0; left: 0;
        width: 280px;
        height: 100vh;
        max-height: 100vh;
        z-index: 1000;
        border-radius: 0;
        transform: translateX(-100%);
        transition: transform 0.25s ease;
        padding: 16px 4px 24px;
        box-shadow: 0 0 30px rgba(0,0,0,0.18);
    }
    .sf-filter-sidebar.is-mobile-open { transform: translateX(0); }
}
.sf-filter-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 4px 16px 12px;
    border-bottom: 1px solid var(--sf-border-soft);
    margin-bottom: 4px;
}
.sf-filter-title { font-size: var(--sf-font-size-lg); font-weight: 600; }
.sf-filter-clear { font-size: 13px; color: var(--sf-text-muted); text-decoration: underline; }
.sf-filter-clear:hover { color: var(--sf-text); }

.sf-filter-group { border-bottom: 1px solid var(--sf-border-soft); }
.sf-filter-group-head {
    width: 100%;
    background: transparent;
    border: 0;
    padding: 14px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-size: var(--sf-font-size-base);
    font-weight: 600;
    color: var(--sf-text);
    text-align: left;
}
.sf-filter-group-head i { transition: transform 0.2s ease; color: var(--sf-text-muted); }
.sf-filter-group:not(.is-open) .sf-filter-group-head i { transform: rotate(-90deg); }
.sf-filter-group-body {
    padding: 0 16px 14px;
    max-height: 600px;
    overflow-y: auto;
    transition: max-height 0.2s ease;
}
.sf-filter-group:not(.is-open) .sf-filter-group-body {
    max-height: 0;
    padding-top: 0;
    padding-bottom: 0;
    overflow: hidden;
}

.sf-sort-list, .sf-brand-list, .sf-attr-list { list-style: none; padding: 0; margin: 0; }
.sf-sort-list li a, .sf-brand-list li a, .sf-attr-list li a {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 0;
    font-size: 14px;
    color: var(--sf-text);
    text-decoration: none;
    line-height: 1.4;
}
.sf-sort-list li a:hover, .sf-brand-list li a:hover, .sf-attr-list li a:hover { color: var(--sf-text); }
.sf-sort-list li a i:first-child, .sf-brand-list li a i:first-child, .sf-attr-list li a i:first-child {
    width: 16px;
    color: var(--sf-text-muted);
    font-size: 14px;
}
.sf-sort-list li a.is-active, .sf-brand-list li a.is-active, .sf-attr-list li a.is-active {
    color: var(--sf-text);
    font-weight: 600;
}
.sf-sort-list li a.is-active i:first-child, .sf-brand-list li a.is-active i:first-child, .sf-attr-list li a.is-active i:first-child { color: var(--sf-text); }
.sf-sort-list li a .sf-sort-arrow { margin-left: auto; color: var(--sf-text-muted); font-size: 12px; }
.sf-brand-list li a em { color: var(--sf-text-muted); font-style: normal; font-size: 12px; margin-left: auto; }

/* 价格区间 */
.sf-price-range { display: flex; flex-direction: column; gap: 8px; }
.sf-price-inputs { display: flex; align-items: center; gap: 8px; }
.sf-price-inputs label { flex: 1; display: flex; flex-direction: column; gap: 4px; font-size: 11px; color: var(--sf-text-muted); }
.sf-price-inputs input {
    width: 100%;
    border: 1px solid var(--sf-border-soft);
    border-radius: var(--sf-radius-sm);
    padding: 6px 8px;
    font-size: 14px;
    color: var(--sf-text);
    background: var(--sf-bg);
}
.sf-price-inputs input:focus { outline: none; border-color: var(--sf-text); }
.sf-price-sep { color: var(--sf-text-muted); margin-top: 16px; }

/* 右侧主区域 */
.sf-list-main { min-width: 0; }
.sf-list-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    gap: 12px;
    flex-wrap: wrap;
}
.sf-list-title {
    font-size: var(--sf-font-size-2xl);
    font-weight: 600;
    margin: 0;
    flex: 1;
    text-align: center;
}
.sf-filter-toggle {
    display: none;
    background: var(--sf-bg);
    border: 1px solid var(--sf-border-soft);
    padding: 8px 14px;
    border-radius: var(--sf-radius);
    cursor: pointer;
    font-size: 14px;
    color: var(--sf-text);
}
.sf-filter-toggle i { margin-right: 6px; }
@media (max-width: 768px) {
    .sf-filter-toggle { display: inline-flex; align-items: center; }
    .sf-list-title { text-align: left; font-size: var(--sf-font-size-xl); }
}

/* 排序下拉 */
.sf-sort-dropdown { position: relative; }
.sf-sort-btn {
    background: var(--sf-bg);
    border: 1px solid var(--sf-border-soft);
    padding: 8px 14px;
    border-radius: var(--sf-radius);
    cursor: pointer;
    font-size: 14px;
    color: var(--sf-text);
    display: flex;
    align-items: center;
    gap: 6px;
}
.sf-sort-btn strong { font-weight: 600; }
.sf-sort-btn i { color: var(--sf-text-muted); }
.sf-sort-menu {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--sf-bg);
    border: 1px solid var(--sf-border-soft);
    border-radius: var(--sf-radius);
    box-shadow: var(--sf-shadow-md);
    min-width: 180px;
    padding: 6px 0;
    margin-top: 4px;
    z-index: 50;
}
.sf-sort-menu.is-open { display: block; }
.sf-sort-menu a {
    display: block;
    padding: 8px 14px;
    color: var(--sf-text);
    font-size: 14px;
    text-decoration: none;
}
.sf-sort-menu a:hover { background: var(--sf-bg-alt); }
.sf-sort-menu a.is-active { font-weight: 600; }

/* 移动端 sidebar 遮罩 */
@media (max-width: 992px) {
    .sf-list-page::before {
        content: '';
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,0.4);
        z-index: 999;
    }
    .sf-filter-sidebar.is-mobile-open::before {
        content: '';
        display: block;
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,0.4);
        z-index: -1;
        margin-left: 0;
    }
}

/* ============== Section 区块 ============== */
.sf-section { padding: var(--sf-space-xl) 0; }
.sf-section-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--sf-space-lg); }
.sf-section-title { font-size: var(--sf-font-size-xl); font-weight: 600; margin: 0; }
.sf-section-link { font-size: var(--sf-font-size-base); color: var(--sf-text-muted); }
.sf-section-link:hover { color: var(--sf-text); }

/* ============== Breadcrumb 面包屑 ============== */
.sf-breadcrumb { padding: var(--sf-space-md) 0; background: transparent; font-size: var(--sf-font-size-sm); color: var(--sf-text-muted); }
.sf-breadcrumb a { color: var(--sf-text-muted); }
.sf-breadcrumb a:hover { color: var(--sf-text); }
.sf-breadcrumb .separator { margin: 0 var(--sf-space-xs); color: var(--sf-text-muted); }

/* ============== Form 表单 ============== */
.sf-form-stack { display: flex; flex-direction: column; gap: var(--sf-space-md); }
.sf-form-stack label { font-size: var(--sf-font-size-sm); color: var(--sf-text-soft); font-weight: 500; margin-bottom: var(--sf-space-xs); display: block; }
.sf-form-stack input[type=text],
.sf-form-stack input[type=email],
.sf-form-stack input[type=password],
.sf-form-stack input[type=tel],
.sf-form-stack select,
.sf-form-stack textarea {
    width: 100%; padding: 12px 16px; font-size: var(--sf-font-size-base);
    border: 1px solid var(--sf-border); border-radius: var(--sf-radius-sm);
    background: var(--sf-bg); transition: border-color var(--sf-transition);
}
.sf-form-stack input:focus, .sf-form-stack select:focus, .sf-form-stack textarea:focus {
    outline: none; border-color: var(--sf-text); box-shadow: 0 0 0 2px rgba(0,0,0,0.05);
}

/* ============== Container 容器 ============== */
.sf-container { max-width: var(--sf-container); margin: 0 auto; padding: 0 var(--sf-space-md); }

/* ============== Price Display 价格显示 ============== */
.sf-price { display: inline-flex; align-items: baseline; gap: var(--sf-space-sm); }
.sf-price-current { font-size: var(--sf-font-size-xl); font-weight: 600; color: var(--sf-price); }
.sf-price-old { font-size: var(--sf-font-size-base); color: var(--sf-price-old); text-decoration: line-through; }
.sf-price-save { font-size: var(--sf-font-size-xs); color: var(--sf-badge-sale); font-weight: 500; }

/* ============== Utility 工具类 ============== */
.sf-text-center { text-align: center; }
.sf-text-right { text-align: right; }
.sf-text-muted { color: var(--sf-text-muted); }
.sf-mt-0 { margin-top: 0; }
.sf-mt-sm { margin-top: var(--sf-space-sm); }
.sf-mt-md { margin-top: var(--sf-space-md); }
.sf-mt-lg { margin-top: var(--sf-space-lg); }
.sf-mt-xl { margin-top: var(--sf-space-xl); }
.sf-mb-0 { margin-bottom: 0; }
.sf-mb-sm { margin-bottom: var(--sf-space-sm); }
.sf-mb-md { margin-bottom: var(--sf-space-md); }
.sf-mb-lg { margin-bottom: var(--sf-space-lg); }
.sf-mb-xl { margin-bottom: var(--sf-space-xl); }
.sf-hidden { display: none; }
.sf-block { display: block; }

/* ============== Empty State 空状态 ============== */
.sf-empty { text-align: center; padding: var(--sf-space-2xl) var(--sf-space-md); color: var(--sf-text-muted); }
.sf-empty-icon { font-size: 64px; margin-bottom: var(--sf-space-md); opacity: 0.3; }
.sf-empty-text { font-size: var(--sf-font-size-md); }

/* ============== Page Content 单页内容（About/Privacy 等） ============== */
.sf-page-content { max-width: 900px; margin: var(--sf-space-xl) auto; padding: var(--sf-space-xl) var(--sf-space-lg); background: var(--sf-bg); border-radius: var(--sf-radius); }
.sf-page-content h1 { font-size: var(--sf-font-size-2xl); margin-bottom: var(--sf-space-md); }
.sf-page-content h2 { font-size: var(--sf-font-size-xl); margin: var(--sf-space-lg) 0 var(--sf-space-sm); }
.sf-page-content p { margin-bottom: var(--sf-space-md); line-height: 1.8; color: var(--sf-text-soft); }
.sf-page-content img { max-width: 100%; height: auto; }