/*
Theme Name: Steelforce CN
Theme URI: https://wm.kwys.net
Author: 科伟永盛（北京）供应链有限公司
Author URI: https://wm.kwys.net
Description: 科伟永盛（北京）供应链有限公司中文版 WordPress 主题。钢铁外贸行业优化版，工业钢铁蓝配色，钢铁仓储/港口/产品实景图。
Version: 3.9.7
License: GNU General Public License v2 or later
License URI: http://www.gnu.org/licenses/gpl-2.0.html
Text Domain: steelforce-cn
Tags: steel, enterprise, business, responsive, custom-post-type, customizer
*/

/* ==================== 引入字体 ==================== */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@300;400;500;700;900&family=Noto+Serif+SC:wght@400;700;900&display=swap');

/* ==================== CSS 设计令牌 ==================== */
:root {
    /* —— 主色系 (工业钢铁蓝) —— */
    --sf-primary: #0a1e3a;
    --sf-primary-dark: #050f1f;
    --sf-primary-light: #143055;
    --sf-primary-lighter: #1e4070;
    --sf-primary-gradient: linear-gradient(135deg, #050f1f 0%, #0a1e3a 50%, #143055 100%);

    /* —— 钢灰色系 (Steel Gray) —— */
    --sf-steel: #64748b;
    --sf-steel-light: #94a3b8;
    --sf-steel-dark: #334155;
    --sf-steel-gradient: linear-gradient(135deg, #1e293b 0%, #334155 50%, #475569 100%);

    /* —— 强调色系 (工业琥珀金) —— */
    --sf-accent: #f59e0b;
    --sf-accent-dark: #d97706;
    --sf-accent-light: #fbbf24;
    --sf-accent-gradient: linear-gradient(135deg, #d97706 0%, #f59e0b 50%, #fbbf24 100%);

    /* —— 功能色 —— */
    --sf-success: #10b981;
    --sf-warning: #f59e0b;
    --sf-error: #ef4444;
    --sf-info: #3b82f6;

    /* —— 文字色阶 —— */
    --sf-text: #1e293b;
    --sf-text-body: #334155;
    --sf-text-light: #64748b;
    --sf-text-lighter: #94a3b8;
    --sf-text-white: #ffffff;

    /* —— 背景色阶 —— */
    --sf-bg-white: #ffffff;
    --sf-bg-light: #f8fafc;
    --sf-bg-gray: #f1f5f9;
    --sf-bg-gray-dark: #e2e8f0;
    --sf-bg-dark: #061528;

    /* —— 边框色阶 —— */
    --sf-border: #e2e8f0;
    --sf-border-light: #f1f5f9;
    --sf-border-dark: #cbd5e1;

    /* —— 间距标尺 (4px 基准) —— */
    --sf-space-xs: 0.25rem;   /* 4px */
    --sf-space-sm: 0.5rem;    /* 8px */
    --sf-space-md: 1rem;      /* 16px */
    --sf-space-lg: 1.5rem;    /* 24px */
    --sf-space-xl: 2rem;      /* 32px */
    --sf-space-2xl: 3rem;     /* 48px */
    --sf-space-3xl: 4rem;     /* 64px */
    --sf-space-4xl: 6rem;     /* 96px */

    /* —— 流体排版标尺 —— */
    --sf-h1: clamp(2.2rem, 4.5vw, 3.5rem);
    --sf-h2: clamp(1.8rem, 3.5vw, 2.5rem);
    --sf-h3: clamp(1.3rem, 2.2vw, 1.6rem);
    --sf-h4: clamp(1.1rem, 1.8vw, 1.3rem);
    --sf-h5: clamp(0.95rem, 1.2vw, 1.1rem);
    --sf-h6: clamp(0.85rem, 1vw, 0.95rem);
    --sf-text-lg: clamp(1.05rem, 1.3vw, 1.2rem);
    --sf-text-base: 1rem;
    --sf-text-sm: 0.875rem;
    --sf-text-xs: 0.75rem;

    /* —— 阴影系统 (分层质感) —— */
    --sf-shadow-xs: 0 1px 2px rgba(13,35,64,0.04);
    --sf-shadow-sm: 0 2px 8px rgba(13,35,64,0.06);
    --sf-shadow: 0 4px 20px rgba(13,35,64,0.08);
    --sf-shadow-md: 0 8px 30px rgba(13,35,64,0.12);
    --sf-shadow-lg: 0 12px 40px rgba(13,35,64,0.15);
    --sf-shadow-hover: 0 24px 64px rgba(13,35,64,0.18);
    --sf-shadow-glow: 0 0 40px rgba(255,149,0,0.15);
    --sf-shadow-accent: 0 8px 30px rgba(255,149,0,0.3);
    --sf-shadow-accent-strong: 0 12px 40px rgba(255,149,0,0.45);

    /* —— 圆角标尺 —— */
    --sf-radius-xs: 4px;
    --sf-radius-sm: 6px;
    --sf-radius: 8px;
    --sf-radius-md: 12px;
    --sf-radius-lg: 16px;
    --sf-radius-xl: 24px;
    --sf-radius-full: 9999px;

    /* —— 过渡系统 —— */
    --sf-transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --sf-transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    --sf-transition-slow: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    --sf-transition-bounce: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);

    /* —— 字体族 —— */
    --sf-font: "Noto Sans SC", "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    --sf-font-serif: "Noto Serif SC", "SimSun", "Microsoft YaHei", serif;

    /* —— 布局 —— */
    --sf-container: 1500px;
    --sf-container-narrow: 1200px;

    /* —— Z轴层级 —— */
    --sf-z-base: 1;
    --sf-z-sticky: 1000;
    --sf-z-topbar: 1001;
    --sf-z-mobile-menu: 1050;
    --sf-z-backdrop: 2000;
    --sf-z-modal: 3000;
}

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

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

body {
    font-family: var(--sf-font);
    color: var(--sf-text-body);
    line-height: 1.75;
    background: #fff;
    background-image:
        repeating-linear-gradient(45deg, transparent, transparent 80px, rgba(13,35,64,0.006) 80px, rgba(13,35,64,0.006) 160px);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

a { color: var(--sf-primary); text-decoration: none; transition: var(--sf-transition); }
a:hover { color: var(--sf-accent); }

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

h1,h2,h3,h4,h5,h6 { font-weight: 700; line-height: 1.3; color: var(--sf-primary); }
h1 { font-size: var(--sf-h1); }
h2 { font-size: var(--sf-h2); }
h3 { font-size: var(--sf-h3); }
h4 { font-size: var(--sf-h4); }
h5 { font-size: var(--sf-h5); }
h6 { font-size: var(--sf-h6); }

p { margin-bottom: var(--sf-space-md); }

ul,ol { list-style-position: inside; }

/* ==================== 布局工具类 ==================== */
.sf-container {
    max-width: var(--sf-container);
    margin: 0 auto;
    padding: 0 30px;
}

.sf-container-narrow { max-width: var(--sf-container-narrow); margin: 0 auto; padding: 0 30px; }

.sf-section { padding: var(--sf-space-4xl) 0; position: relative; }
.sf-section-lg { padding: 120px 0; position: relative; }
.sf-section-sm { padding: var(--sf-space-2xl) 0; }

.sf-text-center { text-align: center; }
.sf-text-left { text-align: left; }
.sf-text-right { text-align: right; }
.sf-text-white { color: #fff; }
.sf-text-primary { color: var(--sf-primary); }
.sf-text-accent { color: var(--sf-accent); }
.sf-text-light { color: var(--sf-text-light); }

/* 背景色工具 */
.sf-bg-light {
    background: var(--sf-bg-light);
    background-image: repeating-linear-gradient(45deg, transparent, transparent 60px, rgba(13,35,64,0.008) 60px, rgba(13,35,64,0.008) 120px);
}
.sf-bg-gray {
    background: var(--sf-bg-gray);
    background-image: repeating-linear-gradient(45deg, transparent, transparent 60px, rgba(13,35,64,0.01) 60px, rgba(13,35,64,0.01) 120px);
}
.sf-bg-primary {
    background: var(--sf-primary);
    background-image:
        radial-gradient(circle at 20% 30%, rgba(255,149,0,0.06) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(20,48,85,0.4) 0%, transparent 50%);
}
.sf-bg-dark {
    background: var(--sf-bg-dark);
    background-image:
        radial-gradient(circle at 30% 20%, rgba(255,149,0,0.05) 0%, transparent 50%),
        radial-gradient(circle at 70% 80%, rgba(20,48,85,0.3) 0%, transparent 50%);
}

/* 渐变背景工具 */
.sf-gradient-primary { background: var(--sf-primary-gradient); }
.sf-gradient-accent { background: var(--sf-accent-gradient); }

/* ==================== 按钮系统 ==================== */
.sf-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 40px;
    font-size: var(--sf-text-base);
    font-weight: 600;
    border-radius: var(--sf-radius);
    transition: var(--sf-transition);
    cursor: pointer;
    border: none;
    letter-spacing: 0.5px;
    position: relative;
    overflow: hidden;
    text-decoration: none;
    line-height: 1.2;
}
.sf-btn::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    transition: left 0.6s ease;
    pointer-events: none;
}
.sf-btn:hover::before { left: 100%; }
.sf-btn i { font-size: 1.1em; }

.sf-btn-primary {
    background: var(--sf-accent-gradient);
    color: #fff;
    box-shadow: 0 4px 20px rgba(255,149,0,0.35);
}
.sf-btn-primary:hover {
    color: #fff;
    transform: translateY(-3px);
    box-shadow: var(--sf-shadow-accent-strong);
}

.sf-btn-outline {
    background: transparent;
    color: var(--sf-primary);
    border: 2px solid var(--sf-primary);
}
.sf-btn-outline:hover {
    background: var(--sf-primary);
    color: #fff;
    transform: translateY(-3px);
    box-shadow: var(--sf-shadow-md);
}

.sf-btn-white {
    background: #fff;
    color: var(--sf-primary);
    box-shadow: 0 4px 15px rgba(0,0,0,0.15);
}
.sf-btn-white:hover {
    background: var(--sf-accent);
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(255,149,0,0.4);
}

.sf-btn-outline-white {
    background: transparent;
    color: #fff;
    border: 2px solid rgba(255,255,255,0.8);
}
.sf-btn-outline-white:hover {
    background: #fff;
    color: var(--sf-primary);
    border-color: #fff;
    transform: translateY(-3px);
}

.sf-btn-lg { padding: 20px 50px; font-size: var(--sf-text-lg); }
.sf-btn-sm { padding: 10px 24px; font-size: var(--sf-text-sm); }

/* ==================== 标题样式 ==================== */
.sf-section-title {
    text-align: center;
    margin-bottom: var(--sf-space-2xl);
    position: relative;
}
.sf-section-title h2 {
    position: relative;
    display: inline-block;
    padding-bottom: 22px;
    margin-bottom: 20px;
    font-size: var(--sf-h2);
    font-weight: 800;
    letter-spacing: 1px;
}
.sf-section-title h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--sf-accent-gradient);
    border-radius: 2px;
    box-shadow: 0 2px 10px rgba(255,149,0,0.3);
}
.sf-section-title h2::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 140px;
    height: 4px;
    background: rgba(255,149,0,0.18);
    border-radius: 2px;
}
.sf-section-title p {
    color: var(--sf-text-light);
    max-width: 820px;
    margin: 0 auto;
    font-size: var(--sf-text-lg);
    line-height: 1.8;
}

/* 带标签的标题 (上方小标签) */
.sf-title-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 7px 20px;
    background: rgba(255,149,0,0.1);
    color: var(--sf-accent-dark);
    border: 1px solid rgba(255,149,0,0.2);
    border-radius: var(--sf-radius-full);
    font-size: var(--sf-text-sm);
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    margin-bottom: 22px;
}

/* ==================== 顶部工具条 ==================== */
.sf-topbar {
    background: #012545;
    background-image:
        linear-gradient(135deg, #012545 0%, #0a1e3a 100%),
        repeating-linear-gradient(45deg, transparent, transparent 20px, rgba(255,255,255,0.012) 20px, rgba(255,255,255,0.012) 40px);
    color: rgba(255,255,255,0.85);
    font-size: var(--sf-text-sm);
    padding: 10px 0;
    position: relative;
    z-index: var(--sf-z-topbar);
    border-bottom: 1px solid rgba(255,149,0,0.15);
}
.sf-topbar::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent 5%, rgba(255,149,0,0.5) 50%, transparent 95%);
}
.sf-topbar .sf-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
}
.sf-topbar-left { display: flex; gap: 22px; align-items: center; }
.sf-topbar-left a {
    color: rgba(255,255,255,0.82);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--sf-transition-fast);
    position: relative;
}
.sf-topbar-left a::after {
    content: '';
    position: absolute;
    left: 0; bottom: -3px;
    width: 0; height: 1px;
    background: var(--sf-accent);
    transition: var(--sf-transition-fast);
}
.sf-topbar-left a:hover { color: var(--sf-accent); }
.sf-topbar-left a:hover::after { width: 100%; }
.sf-topbar-left .sf-sep { color: rgba(255,255,255,0.18); }
.sf-topbar-info { display: flex; gap: 25px; flex-wrap: wrap; }
.sf-topbar-info span { display: inline-flex; align-items: center; }
.sf-topbar-info span i { margin-right: 6px; color: var(--sf-accent); }
.sf-topbar-right { display: flex; gap: 15px; align-items: center; }
.sf-topbar-right a { color: rgba(255,255,255,0.82); transition: var(--sf-transition-fast); }
.sf-topbar-right a:hover { color: var(--sf-accent); }
.sf-lang-switch { display: flex; gap: 6px; align-items: center; }
.sf-lang-switch a {
    padding: 3px 12px;
    border-radius: var(--sf-radius-xs);
    font-size: var(--sf-text-xs);
    font-weight: 600;
    transition: var(--sf-transition-fast);
    border: 1px solid transparent;
}
.sf-lang-switch a.active {
    background: var(--sf-accent);
    color: var(--sf-primary-dark);
    box-shadow: 0 2px 8px rgba(255,149,0,0.4);
}
.sf-lang-switch a:not(.active):hover {
    border-color: rgba(255,149,0,0.4);
    color: var(--sf-accent);
}

/* ==================== 导航栏 ==================== */
.sf-header {
    position: sticky;
    top: 0;
    z-index: var(--sf-z-sticky);
    background: linear-gradient(135deg, #012545 0%, #0a1e3a 50%, #0d2340 100%);
    background-image:
        linear-gradient(135deg, #012545 0%, #0a1e3a 50%, #0d2340 100%),
        repeating-linear-gradient(45deg, transparent, transparent 40px, rgba(255,255,255,0.015) 40px, rgba(255,255,255,0.015) 80px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.15);
    transition: var(--sf-transition);
    border-bottom: 1px solid rgba(255,149,0,0.15);
}
.sf-header.scrolled {
    background: linear-gradient(135deg, #012545 0%, #0a1e3a 50%, #0d2340 100%);
    background-image:
        linear-gradient(135deg, #012545 0%, #0a1e3a 50%, #0d2340 100%),
        repeating-linear-gradient(45deg, transparent, transparent 40px, rgba(255,255,255,0.015) 40px, rgba(255,255,255,0.015) 80px);
    box-shadow: 0 4px 30px rgba(0,0,0,0.25);
    border-bottom-color: rgba(255,149,0,0.25);
}
.sf-nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
    transition: var(--sf-transition);
}
.sf-header.scrolled .sf-nav-wrapper { height: 68px; }

.sf-logo a {
    font-size: 1.7rem;
    font-weight: 800;
    color: #fff;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 12px;
}
.sf-logo .sf-logo-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, rgba(255,255,255,0.1) 0%, rgba(255,149,0,0.15) 100%);
    border: 1.5px solid rgba(255,149,0,0.3);
    border-radius: var(--sf-radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--sf-accent);
    font-size: 1.4rem;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    transition: var(--sf-transition);
    position: relative;
    overflow: hidden;
}
.sf-logo .sf-logo-icon::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 40%, rgba(255,149,0,0.2) 50%, transparent 60%);
    transition: transform 0.6s ease;
    transform: translateX(-100%);
}
.sf-logo a:hover .sf-logo-icon {
    transform: rotate(-5deg) scale(1.05);
    box-shadow: 0 6px 22px rgba(255,149,0,0.4);
    border-color: var(--sf-accent);
}
.sf-logo a:hover .sf-logo-icon::before { transform: translateX(100%); }

.sf-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    list-style: none;
}
.sf-nav > li > a {
    display: block;
    padding: 12px 22px;
    color: rgba(255,255,255,0.9);
    font-weight: 600;
    font-size: var(--sf-text-sm);
    position: relative;
    transition: var(--sf-transition-fast);
    border-radius: var(--sf-radius-sm);
    letter-spacing: 0.5px;
}
.sf-nav > li > a::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 3px;
    background: var(--sf-accent-gradient);
    border-radius: 2px;
    transition: var(--sf-transition);
}
.sf-nav > li > a::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0; height: 0;
    background: rgba(255,255,255,0.08);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: var(--sf-transition);
    z-index: -1;
    pointer-events: none;
}
.sf-nav > li > a:hover::after,
.sf-nav > li.current-menu-item > a::after { width: 32px; }
.sf-nav > li > a:hover { color: #fff; }
.sf-nav > li > a:hover::before { width: 100%; height: 100%; border-radius: var(--sf-radius-sm); }
.sf-nav > li.current-menu-item > a { color: var(--sf-accent); }
.sf-nav > li.current-menu-item > a::after { box-shadow: 0 2px 8px rgba(255,149,0,0.4); }

/* 子菜单 - 深色工业感 */
.sf-nav .sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: rgba(1,37,69,0.98);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    min-width: 260px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3), 0 4px 12px rgba(0,0,0,0.15);
    border-radius: var(--sf-radius-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--sf-transition);
    list-style: none;
    padding: 12px 0;
    border: 1px solid rgba(255,149,0,0.15);
    border-top: 3px solid var(--sf-accent);
}
.sf-nav .sub-menu::before {
    content: '';
    position: absolute;
    top: -10px;
    left: 0;
    right: 0;
    height: 10px;
}
.sf-nav li { position: relative; }
.sf-nav li:hover > .sub-menu,
.sf-nav li:focus-within > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.sf-nav .sub-menu a {
    display: flex;
    align-items: center;
    padding: 12px 22px;
    color: rgba(255,255,255,0.8);
    font-size: var(--sf-text-sm);
    font-weight: 500;
    transition: var(--sf-transition-fast);
    position: relative;
    border-left: 3px solid transparent;
}
.sf-nav .sub-menu a::before {
    content: '\f105';
    font-family: 'Font Awesome 6 Free', 'Font Awesome 5 Free', 'FontAwesome';
    font-weight: 900;
    margin-right: 10px;
    color: var(--sf-text-lighter);
    font-size: 0.75rem;
    transition: var(--sf-transition-fast);
    opacity: 0;
    width: 0;
}
.sf-nav .sub-menu a:hover {
    background: linear-gradient(90deg, rgba(255,149,0,0.12), transparent);
    color: var(--sf-accent);
    border-left-color: var(--sf-accent);
    padding-left: 26px;
}
.sf-nav .sub-menu a:hover::before {
    opacity: 1;
    width: 14px;
    color: var(--sf-accent);
}

.sf-nav-cta { margin-left: 24px; }
.sf-nav-cta a {
    background: var(--sf-accent-gradient) !important;
    color: #fff !important;
    border-radius: var(--sf-radius-full) !important;
    padding: 11px 32px !important;
    box-shadow: 0 6px 20px rgba(255,149,0,0.4);
    position: relative;
    overflow: hidden;
    font-weight: 700 !important;
    letter-spacing: 1px;
}
.sf-nav-cta a::after { display: none !important; }
.sf-nav-cta a::before {
    content: '';
    position: absolute;
    top: 0; left: -100%;
    width: 100%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.4), transparent);
    transition: left 0.6s ease;
}
.sf-nav-cta a:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255,149,0,0.6);
}
.sf-nav-cta a:hover::before { left: 100%; }

/* 移动端菜单按钮 */
.sf-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
    background: none;
    border: none;
    position: relative;
    z-index: var(--sf-z-mobile-menu);
}
.sf-menu-toggle span {
    width: 28px; height: 3px;
    background: #fff;
    transition: var(--sf-transition);
    border-radius: 2px;
}
.sf-menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(7px, 7px); }
.sf-menu-toggle.active span:nth-child(2) { opacity: 0; }
.sf-menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(7px, -7px); }

/* ==================== Hero 英雄区 ==================== */
.sf-hero {
    position: relative;
    min-height: 700px;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, rgba(5,15,31,0.92) 0%, rgba(10,30,58,0.82) 100%),
                url('') center/cover no-repeat;
    color: #fff;
    overflow: hidden;
}
.sf-hero::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(circle at 80% 20%, rgba(245,158,11,0.12) 0%, transparent 50%),
                radial-gradient(circle at 20% 80%, rgba(20,48,85,0.3) 0%, transparent 50%);
    z-index: 1;
}
.sf-hero::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 150px;
    background: linear-gradient(to top, rgba(5,15,31,0.5) 0%, transparent 100%);
    z-index: 1;
}
.sf-hero .sf-container { position: relative; z-index: 2; }
.sf-hero-content { max-width: 700px; padding: 80px 0; }
.sf-hero h1 {
    color: #fff;
    font-size: var(--sf-h1);
    margin-bottom: 25px;
    line-height: 1.15;
    font-weight: 900;
    text-shadow: 0 4px 30px rgba(0,0,0,0.3);
}
.sf-hero .sf-hero-subtitle {
    font-size: var(--sf-text-lg);
    margin-bottom: 35px;
    opacity: 0.95;
    max-width: 580px;
    line-height: 1.8;
    font-weight: 300;
}
.sf-hero-buttons { display: flex; gap: 20px; flex-wrap: wrap; }
.sf-hero-scroll {
    position: absolute;
    bottom: 35px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255,255,255,0.7);
    font-size: 1.5rem;
    animation: sf-bounce 2s infinite;
    cursor: pointer;
    z-index: 2;
}
@keyframes sf-bounce {
    0%,100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(12px); }
}

/* ==================== 关于我们 ==================== */
.sf-about { background: #fff; position: relative; }
.sf-about::before {
    content: '';
    position: absolute;
    top: 0; right: 0;
    width: 500px; height: 500px;
    background: radial-gradient(circle, rgba(245,158,11,0.04) 0%, transparent 70%);
    pointer-events: none;
}
.sf-about::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 400px; height: 400px;
    background: radial-gradient(circle, rgba(10,30,58,0.03) 0%, transparent 70%);
    pointer-events: none;
}
.sf-about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.sf-about-text h2 { margin-bottom: 25px; font-size: var(--sf-h2); }
.sf-about-text p {
    color: var(--sf-text-light);
    margin-bottom: 20px;
    font-size: var(--sf-text-lg);
    line-height: 1.85;
}
.sf-about-buttons { display: flex; gap: 20px; flex-wrap: wrap; margin-top: 30px; }
.sf-about-image {
    position: relative;
    border-radius: var(--sf-radius-lg);
    overflow: hidden;
    box-shadow: var(--sf-shadow-md);
}
.sf-about-image::after {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(135deg, rgba(13,35,64,0.1) 0%, transparent 50%);
    z-index: 1;
}
.sf-about-image img {
    width: 100%;
    height: 450px;
    object-fit: cover;
    transition: var(--sf-transition-slow);
}
.sf-about-image:hover img { transform: scale(1.05); }

/* 进化图表区 */
.sf-evolution {
    background: var(--sf-bg-light);
    padding: 50px;
    border-radius: var(--sf-radius-lg);
    text-align: center;
    box-shadow: var(--sf-shadow);
    border: 1px solid var(--sf-border);
}
.sf-evolution h3 { margin-bottom: 25px; color: var(--sf-primary); font-size: var(--sf-h3); }
.sf-evolution-chart {
    display: flex;
    align-items: flex-end;
    justify-content: center;
    gap: 20px;
    height: 220px;
    padding-top: 25px;
}
.sf-evolution-bar {
    flex: 1;
    max-width: 70px;
    background: linear-gradient(to top, var(--sf-primary-dark), var(--sf-primary-light));
    border-radius: 6px 6px 0 0;
    position: relative;
    transition: var(--sf-transition);
    min-height: 20px;
    box-shadow: 0 4px 15px rgba(13,35,64,0.2);
}
.sf-evolution-bar:hover {
    background: linear-gradient(to top, var(--sf-accent-dark), var(--sf-accent-light));
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(255,149,0,0.4);
}
.sf-evolution-bar span {
    position: absolute;
    bottom: -28px;
    left: 50%;
    transform: translateX(-50%);
    font-size: var(--sf-text-sm);
    color: var(--sf-text-light);
    font-weight: 500;
}
.sf-evolution-bar em {
    position: absolute;
    top: -25px;
    left: 50%;
    transform: translateX(-50%);
    font-size: var(--sf-text-sm);
    font-style: normal;
    font-weight: 700;
    color: var(--sf-primary);
}

/* ==================== 承诺/优势区 ==================== */
.sf-promise {
    background: var(--sf-primary-dark);
    color: #fff;
    position: relative;
    overflow: hidden;
}
.sf-promise::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(245,158,11,0.08) 0%, transparent 50%),
                radial-gradient(circle at 70% 50%, rgba(20,48,85,0.15) 0%, transparent 50%);
    pointer-events: none;
}
.sf-promise .sf-container { position: relative; z-index: 1; }
.sf-promise .sf-section-title h2 { color: #fff; }
.sf-promise .sf-section-title p { color: rgba(255,255,255,0.75); }
.sf-promise-text {
    text-align: center;
    max-width: 850px;
    margin: 0 auto 50px;
    color: rgba(255,255,255,0.9);
    font-size: var(--sf-text-lg);
    font-weight: 300;
}
.sf-promise-features {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 35px;
    text-align: center;
}
.sf-promise-feature .sf-feature-icon {
    width: 80px; height: 80px;
    margin: 0 auto 25px;
    background: rgba(255,255,255,0.08);
    border: 2px solid var(--sf-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: var(--sf-accent);
    transition: var(--sf-transition);
    backdrop-filter: blur(10px);
}
.sf-promise-feature:hover .sf-feature-icon {
    background: var(--sf-accent-gradient);
    color: #fff;
    transform: translateY(-8px) scale(1.1);
    box-shadow: 0 10px 30px rgba(255,149,0,0.4);
}
.sf-promise .sf-promise-feature h4 { color: #fff; margin-bottom: 12px; font-size: var(--sf-h4); }
.sf-promise .sf-promise-feature p { color: rgba(255,255,255,0.7); font-size: var(--sf-text-sm); line-height: 1.7; }

/* —— 服务页特色卡片 (浅色背景专用，文字为深色) —— */
.sf-service-features {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}
.sf-service-feature {
    background: #fff;
    border-radius: var(--sf-radius-lg);
    padding: 35px 25px;
    box-shadow: var(--sf-shadow);
    transition: var(--sf-transition);
    border-top: 4px solid transparent;
    position: relative;
    overflow: hidden;
}
.sf-service-feature::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: var(--sf-accent-gradient);
    opacity: 0;
    transition: var(--sf-transition);
}
.sf-service-feature:hover {
    transform: translateY(-6px);
    box-shadow: var(--sf-shadow-hover);
    border-top-color: var(--sf-accent);
}
.sf-service-feature:hover::before { opacity: 1; }
.sf-service-feature .sf-feature-icon {
    width: 72px; height: 72px;
    margin: 0 auto 22px;
    background: linear-gradient(135deg, rgba(255,149,0,0.12), rgba(13,35,64,0.08));
    border: 2px solid var(--sf-accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.6rem;
    color: var(--sf-accent-dark);
    transition: var(--sf-transition);
}
.sf-service-feature:hover .sf-feature-icon {
    background: var(--sf-accent-gradient);
    color: #fff;
    transform: scale(1.1);
    box-shadow: 0 8px 25px rgba(255,149,0,0.35);
    border-color: var(--sf-accent-dark);
}
.sf-service-feature h4 {
    color: var(--sf-primary);
    margin-bottom: 12px;
    font-size: var(--sf-h4);
    font-weight: 700;
}
.sf-service-feature p {
    color: var(--sf-text-light);
    font-size: var(--sf-text-sm);
    line-height: 1.75;
}

/* ==================== 数据统计区 ==================== */
.sf-stats {
    background: var(--sf-primary-gradient);
    color: #fff;
    padding: 80px 0;
    position: relative;
    overflow: hidden;
}
.sf-stats::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(245,158,11,0.1) 0%, transparent 60%);
    pointer-events: none;
}
.sf-stats .sf-container { position: relative; z-index: 1; }
.sf-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    text-align: center;
}
.sf-stat-item {
    text-align: center;
    padding: 25px 20px;
    border-right: 1px solid rgba(255,255,255,0.15);
    transition: var(--sf-transition);
}
.sf-stat-item:hover {
    background: rgba(255,255,255,0.05);
    border-radius: var(--sf-radius);
}
.sf-stat-item:last-child { border-right: none; }
.sf-stat-number {
    font-size: clamp(2.5rem, 4vw, 3.5rem);
    font-weight: 900;
    color: var(--sf-accent);
    line-height: 1;
    margin-bottom: 12px;
    text-shadow: 0 2px 20px rgba(255,149,0,0.3);
}
.sf-stat-number .sf-counter { display: inline-block; }
.sf-stat-label {
    font-size: var(--sf-text-base);
    color: rgba(255,255,255,0.9);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    font-weight: 500;
}

/* ==================== 产品展示区 ==================== */
.sf-products { background: #fff; }
.sf-products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 35px;
}
.sf-product-card {
    background: #fff;
    border: 1px solid var(--sf-border);
    border-radius: var(--sf-radius-lg);
    overflow: hidden;
    transition: var(--sf-transition);
    box-shadow: var(--sf-shadow-xs);
}
.sf-product-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--sf-shadow-hover);
    border-color: var(--sf-accent);
}
.sf-product-image { height: 240px; overflow: hidden; position: relative; }
.sf-product-image img {
    width: 100%; height: 100%;
    object-fit: cover;
    transition: var(--sf-transition-slow);
}
.sf-product-card:hover .sf-product-image img { transform: scale(1.12); }
.sf-product-image .sf-product-tag {
    position: absolute;
    top: 18px; left: 18px;
    background: var(--sf-accent-gradient);
    color: #fff;
    padding: 6px 16px;
    border-radius: var(--sf-radius-full);
    font-size: var(--sf-text-xs);
    font-weight: 600;
    box-shadow: 0 4px 15px rgba(255,149,0,0.4);
}
.sf-product-body { padding: 28px; }
.sf-product-body h3 { font-size: var(--sf-h4); margin-bottom: 12px; }
.sf-product-body h3 a { color: var(--sf-primary); transition: var(--sf-transition); }
.sf-product-body h3 a:hover { color: var(--sf-accent); }
.sf-product-body p { color: var(--sf-text-light); font-size: var(--sf-text-sm); margin-bottom: 18px; line-height: 1.75; }
.sf-product-link {
    color: var(--sf-primary);
    font-weight: 600;
    font-size: var(--sf-text-sm);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: var(--sf-transition);
}
.sf-product-link:hover { color: var(--sf-accent); gap: 12px; }

/* 双列图文区 */
.sf-cta-blocks { display: grid; grid-template-columns: 1fr 1fr; gap: 35px; }
.sf-cta-block {
    position: relative;
    border-radius: var(--sf-radius-lg);
    overflow: hidden;
    min-height: 380px;
    display: flex;
    align-items: center;
    padding: 50px;
    color: #fff;
    box-shadow: var(--sf-shadow-md);
}
.sf-cta-block::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: linear-gradient(135deg, rgba(6,21,40,0.85), rgba(13,35,64,0.65));
    z-index: 1;
}
.sf-cta-block img {
    position: absolute;
    top: 0; left: 0;
    width: 100%; height: 100%;
    object-fit: cover;
    z-index: 0;
    transition: var(--sf-transition-slow);
}
.sf-cta-block:hover img { transform: scale(1.08); }
.sf-cta-block-content { position: relative; z-index: 2; max-width: 420px; }
.sf-cta-block-content h3 { color: #fff; font-size: var(--sf-h3); margin-bottom: 18px; }
.sf-cta-block-content p { color: rgba(255,255,255,0.9); margin-bottom: 25px; font-size: var(--sf-text-base); line-height: 1.8; }

/* ==================== 全球网络区 ==================== */
.sf-global { background: var(--sf-bg-light); position: relative; overflow: hidden; }
.sf-global::before {
    content: '';
    position: absolute;
    top: -200px; right: -200px;
    width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(13,35,64,0.05) 0%, transparent 70%);
    pointer-events: none;
}
.sf-global-map { text-align: center; margin: 50px 0; position: relative; }
.sf-global-map img {
    max-width: 100%;
    border-radius: var(--sf-radius-lg);
    box-shadow: var(--sf-shadow-md);
}
.sf-global-points { display: grid; grid-template-columns: repeat(3, 1fr); gap: 25px; margin-top: 50px; }
.sf-global-point {
    background: #fff;
    padding: 30px;
    border-radius: var(--sf-radius-lg);
    box-shadow: var(--sf-shadow);
    text-align: center;
    transition: var(--sf-transition);
    border-top: 4px solid var(--sf-accent);
    position: relative;
    overflow: hidden;
}
.sf-global-point::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: var(--sf-accent-gradient);
}
.sf-global-point:hover { transform: translateY(-8px); box-shadow: var(--sf-shadow-hover); }
.sf-global-point h4 { color: var(--sf-primary); margin-bottom: 10px; font-size: var(--sf-h4); }
.sf-global-point h4 i { margin-right: 8px; color: var(--sf-accent); }
.sf-global-point p { font-size: var(--sf-text-sm); color: var(--sf-text-light); line-height: 1.7; }

/* ==================== 联系区 ==================== */
.sf-contact {
    background: var(--sf-primary-dark);
    color: #fff;
    position: relative;
    overflow: hidden;
}
.sf-contact::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background: radial-gradient(circle at 20% 80%, rgba(245,158,11,0.08) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(20,48,85,0.15) 0%, transparent 50%);
    pointer-events: none;
}
.sf-contact .sf-container { position: relative; z-index: 1; }
.sf-contact .sf-section-title h2 { color: #fff; }
.sf-contact-grid { display: grid; grid-template-columns: 1fr 1.5fr; gap: 60px; }
.sf-contact-info h3 { color: #fff; margin-bottom: 30px; font-size: var(--sf-h3); }
.sf-contact-item { display: flex; align-items: flex-start; gap: 18px; margin-bottom: 28px; }
.sf-contact-item .sf-contact-icon {
    width: 50px; height: 50px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,149,0,0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--sf-accent);
    font-size: 1.2rem;
    flex-shrink: 0;
    transition: var(--sf-transition);
    backdrop-filter: blur(10px);
}
.sf-contact-item:hover .sf-contact-icon {
    background: var(--sf-accent-gradient);
    color: #fff;
    border-color: var(--sf-accent);
    transform: scale(1.1);
}
.sf-contact-item .sf-contact-text h5 { color: #fff; margin-bottom: 6px; font-size: var(--sf-text-base); }
.sf-contact-item .sf-contact-text p { color: rgba(255,255,255,0.75); font-size: var(--sf-text-sm); }

/* 联系表单 */
.sf-contact-form {
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(20px);
    padding: 45px;
    border-radius: var(--sf-radius-lg);
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.sf-contact-form .sf-form-group { margin-bottom: 22px; }
.sf-contact-form label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--sf-text);
    font-size: var(--sf-text-sm);
}
.sf-contact-form input[type="text"],
.sf-contact-form input[type="email"],
.sf-contact-form input[type="tel"],
.sf-contact-form textarea,
.sf-contact-form select {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid var(--sf-border);
    border-radius: var(--sf-radius);
    font-family: var(--sf-font);
    font-size: var(--sf-text-base);
    transition: var(--sf-transition);
    background: var(--sf-bg-light);
}
.sf-contact-form input:focus,
.sf-contact-form textarea:focus,
.sf-contact-form select:focus {
    outline: none;
    border-color: var(--sf-accent);
    background: #fff;
    box-shadow: 0 0 0 4px rgba(255,149,0,0.1);
}
.sf-contact-form textarea { min-height: 140px; resize: vertical; }
.sf-form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }

/* ==================== 页脚 ==================== */
.sf-footer {
    background: var(--sf-bg-dark);
    color: rgba(255,255,255,0.7);
    padding: 70px 0 0;
    position: relative;
    overflow: hidden;
}
.sf-footer::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--sf-accent), transparent);
}
.sf-footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 50px;
    margin-bottom: 50px;
}
.sf-footer-brand .sf-logo a { color: #fff; }
.sf-footer-brand p { margin: 18px 0; font-size: var(--sf-text-sm); line-height: 1.85; }
.sf-footer-social { display: flex; gap: 14px; }
.sf-footer-social a {
    width: 42px; height: 42px;
    background: rgba(255,255,255,0.08);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 0.95rem;
    transition: var(--sf-transition);
    backdrop-filter: blur(10px);
}
.sf-footer-social a:hover {
    background: var(--sf-accent-gradient);
    transform: translateY(-4px);
    box-shadow: 0 8px 20px rgba(255,149,0,0.3);
}
.sf-footer-col h4 {
    color: #fff;
    margin-bottom: 22px;
    font-size: var(--sf-h5);
    position: relative;
    padding-bottom: 14px;
}
.sf-footer-col h4::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0;
    width: 40px; height: 3px;
    background: var(--sf-accent-gradient);
    border-radius: 2px;
}
.sf-footer-col ul { list-style: none; }
.sf-footer-col ul li { margin-bottom: 12px; display: flex; align-items: flex-start; gap: 4px; line-height: 1.7; }
.sf-footer-col ul li a {
    color: rgba(255,255,255,0.7);
    font-size: var(--sf-text-sm);
    transition: var(--sf-transition);
    display: inline-block;
}
.sf-footer-col ul li a:hover { color: var(--sf-accent); padding-left: 8px; }
.sf-footer-col ul li i { margin-right: 8px; color: var(--sf-accent); width: 18px; }
.sf-footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 25px 0;
    text-align: center;
    font-size: var(--sf-text-sm);
}
.sf-footer-bottom a { color: rgba(255,255,255,0.7); }
.sf-footer-bottom a:hover { color: var(--sf-accent); }

/* ==================== 返回顶部按钮 ==================== */
.sf-backtop {
    position: fixed;
    bottom: 30px; right: 30px;
    width: 50px; height: 50px;
    background: var(--sf-primary-gradient);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    cursor: pointer;
    z-index: 999;
    box-shadow: 0 4px 20px rgba(13,35,64,0.3);
    transition: var(--sf-transition);
    opacity: 0;
    transform: translateY(20px);
}
.sf-backtop.sf-show { opacity: 1; transform: translateY(0); }
.sf-backtop:hover {
    background: var(--sf-accent-gradient);
    transform: translateY(-5px);
    box-shadow: 0 8px 30px rgba(255,149,0,0.4);
}

/* ==================== 内页通用样式 ==================== */
.sf-page-header {
    background: var(--sf-primary-gradient);
    color: #fff;
    padding: 110px 0 85px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.sf-page-header::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background:
        radial-gradient(circle at 50% 50%, rgba(255,149,0,0.12) 0%, transparent 60%),
        radial-gradient(circle at 20% 30%, rgba(20,48,85,0.4) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(5,15,31,0.3) 0%, transparent 50%);
    pointer-events: none;
}
.sf-page-header::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 4px;
    background: linear-gradient(90deg, transparent 5%, var(--sf-accent) 50%, transparent 95%);
}
.sf-page-header > .sf-container { position: relative; z-index: 1; }
.sf-page-header h1 {
    color: #fff;
    margin-bottom: 12px;
    font-size: var(--sf-h1);
    text-shadow: 0 4px 24px rgba(0,0,0,0.3);
    letter-spacing: 2px;
    position: relative;
    display: inline-block;
}
.sf-page-header h1::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: -18px;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--sf-accent-gradient);
    border-radius: 2px;
}
.sf-page-header .sf-page-subtitle {
    color: rgba(255,255,255,0.88);
    font-size: var(--sf-text-lg);
    max-width: 720px;
    margin: 32px auto 0;
    font-weight: 300;
    line-height: 1.75;
}
.sf-breadcrumb {
    font-size: var(--sf-text-sm);
    color: rgba(255,255,255,0.75);
    margin-top: 18px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 18px;
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: var(--sf-radius-full);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}
.sf-breadcrumb a { color: rgba(255,255,255,0.78); transition: var(--sf-transition-fast); }
.sf-breadcrumb a:hover { color: var(--sf-accent); }
.sf-breadcrumb .sf-sep { margin: 0 6px; color: rgba(255,255,255,0.4); }

.sf-content-area { padding: 80px 0; background: #fff; position: relative; }
.sf-content-area::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(13,35,64,0.08), transparent);
}
.sf-content-area .sf-entry-content { max-width: 1000px; margin: 0 auto; }
.sf-content-area h2, .sf-content-area h3 { margin: 30px 0 18px; }
.sf-content-area p { margin-bottom: 18px; color: var(--sf-text-light); line-height: 1.85; }
.sf-content-area img { border-radius: var(--sf-radius-lg); margin: 25px 0; box-shadow: var(--sf-shadow); }

/* 产品归档页 */
.sf-archive-header {
    background: var(--sf-primary-gradient);
    color: #fff;
    padding: 70px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.sf-archive-header::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    background:
        radial-gradient(circle at 50% 50%, rgba(255,149,0,0.12) 0%, transparent 60%),
        repeating-linear-gradient(45deg, transparent, transparent 30px, rgba(255,255,255,0.015) 30px, rgba(255,255,255,0.015) 60px);
    pointer-events: none;
}
.sf-archive-header::after {
    content: '';
    position: absolute;
    bottom: 0; left: 0; right: 0;
    height: 3px;
    background: linear-gradient(90deg, transparent 5%, var(--sf-accent) 50%, transparent 95%);
}
.sf-archive-header .sf-container { position: relative; z-index: 1; }
.sf-archive-header h1 {
    color: #fff;
    text-shadow: 0 4px 20px rgba(0,0,0,0.25);
    letter-spacing: 1.5px;
}

/* 单篇文章/产品 */
.sf-single-wrapper { max-width: 1000px; margin: 0 auto; padding: 70px 30px; }
.sf-single-meta {
    display: flex;
    gap: 25px;
    font-size: var(--sf-text-sm);
    color: var(--sf-text-light);
    margin-bottom: 30px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--sf-border);
}
.sf-single-meta span i { margin-right: 6px; color: var(--sf-accent); }

/* 搜索 */
.sf-search-results { max-width: 900px; margin: 0 auto; padding: 70px 30px; }
.sf-search-result-item { padding: 25px 0; border-bottom: 1px solid var(--sf-border); transition: var(--sf-transition); }
.sf-search-result-item:hover { padding-left: 10px; }
.sf-search-result-item h3 a { color: var(--sf-primary); }

/* 404 */
.sf-404 { text-align: center; padding: 120px 20px; }
.sf-404 h1 {
    font-size: clamp(5rem, 12vw, 8rem);
    background: var(--sf-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.sf-404 p { margin: 25px 0 35px; color: var(--sf-text-light); font-size: var(--sf-text-lg); }

/* 内页增强样式 */
.sf-page-content { padding: 80px 0; background: #fff; }
.sf-page-content .sf-container { max-width: 1200px; }
.sf-service-card {
    background: #fff;
    border-radius: var(--sf-radius-lg);
    padding: 40px;
    box-shadow: var(--sf-shadow);
    transition: var(--sf-transition);
    border: 1px solid var(--sf-border);
}
.sf-service-card:hover { transform: translateY(-8px); box-shadow: var(--sf-shadow-hover); border-color: var(--sf-accent); }
.sf-service-card .sf-service-icon {
    width: 70px; height: 70px;
    background: var(--sf-primary-gradient);
    border-radius: var(--sf-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--sf-accent);
    font-size: 1.6rem;
    margin-bottom: 25px;
    box-shadow: 0 8px 20px rgba(13,35,64,0.2);
    transition: var(--sf-transition);
}
.sf-service-card:hover .sf-service-icon {
    transform: scale(1.1) rotate(-5deg);
    box-shadow: 0 10px 25px rgba(255,149,0,0.3);
}
.sf-service-card h3 { margin-bottom: 15px; font-size: var(--sf-h3); }
.sf-service-card p { color: var(--sf-text-light); line-height: 1.8; }

.sf-contact-page-info { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; margin-bottom: 50px; }
.sf-contact-page-card {
    background: var(--sf-bg-light);
    padding: 35px;
    border-radius: var(--sf-radius-lg);
    text-align: center;
    transition: var(--sf-transition);
    border: 1px solid var(--sf-border);
}
.sf-contact-page-card:hover { transform: translateY(-5px); box-shadow: var(--sf-shadow-md); background: #fff; }
.sf-contact-page-card .sf-contact-icon {
    width: 60px; height: 60px;
    background: var(--sf-primary-gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--sf-accent);
    font-size: 1.3rem;
    margin: 0 auto 20px;
    box-shadow: 0 8px 20px rgba(13,35,64,0.2);
}
.sf-contact-page-card h4 { margin-bottom: 10px; font-size: var(--sf-h5); }
.sf-contact-page-card p { color: var(--sf-text-light); font-size: var(--sf-text-sm); }

.sf-global-network-map { text-align: center; margin: 40px 0; }
.sf-global-network-map img { max-width: 100%; border-radius: var(--sf-radius-lg); box-shadow: var(--sf-shadow-md); }

/* ==================== 全球分销网络动态地图 ==================== */
.sf-global-network {
    position: relative;
    background: linear-gradient(135deg, #050f1f 0%, #012545 30%, #0a1e3a 70%, #050f1f 100%);
    padding: 80px 0;
    overflow: hidden;
}
.sf-global-network-bg {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(ellipse at 20% 50%, rgba(245,158,11,0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 50%, rgba(96,165,250,0.05) 0%, transparent 50%),
        repeating-linear-gradient(45deg, transparent, transparent 40px, rgba(255,255,255,0.01) 40px, rgba(255,255,255,0.01) 80px);
    pointer-events: none;
}
.sf-global-network-grid {
    display: grid;
    grid-template-columns: 1fr 1.3fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}
.sf-global-network-text .sf-title-tag {
    background: rgba(245,158,11,0.12);
    border-color: rgba(245,158,11,0.3);
    color: var(--sf-accent);
}
.sf-global-network-text h2 {
    color: #fff;
    font-size: clamp(1.6rem, 3.5vw, 2.4rem);
    font-weight: 800;
    margin: 16px 0 20px;
    line-height: 1.3;
}
.sf-global-network-text p {
    color: rgba(255,255,255,0.7);
    font-size: 0.95rem;
    line-height: 1.85;
    margin-bottom: 30px;
}
.sf-global-network-map {
    position: relative;
    width: 100%;
}
.sf-world-map {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 4px 30px rgba(0,0,0,0.3));
}

/* 节点脉冲动画 */
.sf-node-pulse {
    transform-origin: center;
    transform-box: fill-box;
    animation: sfNodePulse 2.5s ease-out infinite;
}
.sf-node-pulse.sf-delay-1 { animation-delay: 0.4s; }
.sf-node-pulse.sf-delay-2 { animation-delay: 0.8s; }
.sf-node-pulse.sf-delay-3 { animation-delay: 1.2s; }
@keyframes sfNodePulse {
    0% { opacity: 0.8; transform: scale(0.7); }
    50% { opacity: 0.3; transform: scale(1.5); }
    100% { opacity: 0; transform: scale(2); }
}

/* 节点核心点闪烁 */
.sf-node-core {
    animation: sfNodeBlink 2s ease-in-out infinite;
    transform-origin: center;
    transform-box: fill-box;
}
@keyframes sfNodeBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* 连接线流动动画 */
.sf-flow-line {
    animation: sfFlowDash 1.5s linear infinite;
}
.sf-flow-1 { animation-delay: 0s; }
.sf-flow-2 { animation-delay: 0.2s; }
.sf-flow-3 { animation-delay: 0.4s; }
.sf-flow-4 { animation-delay: 0.6s; }
.sf-flow-5 { animation-delay: 0.8s; }
.sf-flow-6 { animation-delay: 1s; }
.sf-flow-7 { animation-delay: 0.3s; }
.sf-flow-8 { animation-delay: 0.5s; }
.sf-flow-9 { animation-delay: 0.7s; }
@keyframes sfFlowDash {
    to { stroke-dashoffset: -20; }
}

/* 城市标签 */
.sf-map-label {
    font-family: 'Noto Sans SC', sans-serif;
    text-shadow: 0 0 8px rgba(0,0,0,0.6);
    opacity: 0;
    animation: sfLabelFadeIn 1s ease forwards;
    animation-delay: 0.5s;
}
@keyframes sfLabelFadeIn {
    to { opacity: 1; }
}

/* —— front-page.php 分销网络区块补充样式 —— */
.sf-global-network-content {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}
.sf-global-network-title {
    color: #fff;
    font-size: clamp(1.6rem, 3.5vw, 2.4rem);
    font-weight: 800;
    margin: 0 0 20px;
    line-height: 1.3;
}
.sf-global-network-desc {
    color: rgba(255,255,255,0.7);
    font-size: 0.95rem;
    line-height: 1.85;
    margin: 0 0 30px;
}
.sf-global-network-cta {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(135deg, #f59e0b, #d97706);
    color: #fff;
    padding: 12px 32px;
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 700;
    text-decoration: none;
    box-shadow: 0 6px 20px rgba(245,158,11,0.4);
    transition: all 0.3s ease;
    letter-spacing: 1px;
}
.sf-global-network-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(245,158,11,0.6);
}
.sf-global-network-map-wrap {
    position: relative;
    width: 100%;
    min-height: 300px;
}
.sf-dot-world-map {
    position: absolute;
    inset: 0;
    background-image: radial-gradient(circle, rgba(255,255,255,0.12) 1px, transparent 1.5px);
    background-size: 12px 12px;
    opacity: 0.5;
    border-radius: var(--sf-radius-lg);
}
.sf-global-network-svg {
    position: relative;
    width: 100%;
    height: auto;
    z-index: 1;
    filter: drop-shadow(0 4px 30px rgba(0,0,0,0.3));
}

/* 弧线样式 */
.sf-arc {
    stroke: rgba(245,158,11,0.5);
    stroke-width: 1.5;
    stroke-dasharray: 5,5;
    animation: sfArcFlow 1.5s linear infinite;
}
@keyframes sfArcFlow {
    to { stroke-dashoffset: -20; }
}

/* 沿弧线移动的粒子 */
.sf-particle {
    fill: #f59e0b;
    filter: drop-shadow(0 0 4px rgba(245,158,11,0.8));
}

/* 节点样式 */
.sf-node-glow {
    fill: rgba(245,158,11,0.15);
    animation: sfNodeGlow 2s ease-in-out infinite;
}
@keyframes sfNodeGlow {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 0.3; }
}
.sf-node-sm { transform: scale(0.85); transform-origin: center; transform-box: fill-box; }

/* HTML 标签定位（front-page 版本用 span） */
.sf-global-network-map-wrap .sf-map-label {
    position: absolute;
    transform: translate(-50%, -50%);
    color: rgba(255,255,255,0.85);
    font-size: 0.8rem;
    font-weight: 600;
    font-family: 'Noto Sans SC', sans-serif;
    text-shadow: 0 0 6px rgba(0,0,0,0.8);
    white-space: nowrap;
    pointer-events: none;
    z-index: 2;
}

/* 网站地图样式 */
.sf-sitemap { max-width: 1200px; margin: 0 auto; padding: 60px 30px; }
.sf-sitemap h2 { margin-bottom: 25px; color: var(--sf-primary); }
.sf-sitemap ul { list-style: none; margin-bottom: 30px; }
.sf-sitemap ul li { margin-bottom: 10px; padding-left: 20px; position: relative; }
.sf-sitemap ul li::before { content: '\25B8'; position: absolute; left: 0; color: var(--sf-accent); }
.sf-sitemap ul li a { color: var(--sf-text); }
.sf-sitemap ul li a:hover { color: var(--sf-accent); }

/* ==================== 响应式 ==================== */
@media (max-width: 1200px) { .sf-container { padding: 0 25px; } }

@media (max-width: 992px) {
    .sf-promise-features, .sf-service-features, .sf-stats-grid { grid-template-columns: repeat(2, 1fr); }
    .sf-products-grid { grid-template-columns: repeat(2, 1fr); }
    .sf-global-points { grid-template-columns: repeat(2, 1fr); }
    .sf-about-grid, .sf-contact-grid, .sf-cta-blocks { grid-template-columns: 1fr; }
    .sf-footer-grid { grid-template-columns: repeat(2, 1fr); }
    .sf-contact-page-info { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    /* 隐藏顶部工具栏 (steelforce.eu 移动端无工具栏) */
    .sf-topbar { display: none !important; }

    /* 移动端汉堡按钮 */
    .sf-menu-toggle { display: flex; }
    .sf-menu-toggle span { background: #fff; }

    /* 移动端头部 —— z-index 必须高于遮罩层(1040)，否则抽屉菜单会被遮罩盖住变灰 */
    .sf-header {
        background: linear-gradient(135deg, #012545 0%, #0a1e3a 100%);
        box-shadow: 0 2px 15px rgba(0,0,0,0.2);
        z-index: 1060;
    }
    .sf-nav-wrapper { height: 64px; }
    .sf-header.scrolled .sf-nav-wrapper { height: 60px; }
    .sf-header.scrolled {
        background: linear-gradient(135deg, #012545 0%, #0a1e3a 100%);
        box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    }

    /* Logo 缩小 */
    .sf-logo a { font-size: 1.3rem; gap: 8px; }
    .sf-logo .sf-logo-icon { width: 40px; height: 40px; font-size: 1.1rem; }

    /* —— 抽屉式导航容器 (steelforce.eu 深蓝色背景) —— */
    .sf-nav {
        display: block !important;
        position: fixed;
        top: 0; right: -100%;
        width: 85%;
        max-width: 360px;
        height: 100vh;
        height: 100dvh;
        background: #012545;
        background-image:
            linear-gradient(180deg, #012545 0%, #0a1e3a 100%),
            repeating-linear-gradient(45deg, transparent, transparent 40px, rgba(255,255,255,0.015) 40px, rgba(255,255,255,0.015) 80px);
        flex-direction: column;
        padding: 70px 0 40px;
        box-shadow: -10px 0 50px rgba(0,0,0,0.4);
        gap: 0;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        transition: right 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        z-index: var(--sf-z-mobile-menu);
        max-height: none;
        visibility: hidden;
    }
    .sf-nav.active {
        right: 0;
        visibility: visible;
    }

    /* 遮罩层 */
    .sf-nav-overlay {
        display: none !important;
        position: fixed;
        top: 0; left: 0; right: 0; bottom: 0;
        background: rgba(0,0,0,0.6);
        backdrop-filter: blur(4px);
        -webkit-backdrop-filter: blur(4px);
        z-index: 1040;
        opacity: 0;
        transition: opacity 0.4s ease;
    }
    .sf-nav-overlay.active {
        display: block !important;
        opacity: 1;
    }

    /* 关闭按钮 */
    .sf-nav-close {
        position: absolute;
        top: 18px; right: 18px;
        width: 40px; height: 40px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.4rem;
        color: rgba(255,255,255,0.7);
        cursor: pointer;
        border-radius: 50%;
        background: rgba(255,255,255,0.08);
        border: 1px solid rgba(255,255,255,0.12);
        transition: var(--sf-transition);
        z-index: 10;
    }
    .sf-nav-close:active {
        background: rgba(255,149,0,0.15);
        color: var(--sf-accent);
        transform: scale(0.9);
    }

    /* 菜单项 */
    .sf-nav > li {
        width: 100%;
        border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .sf-nav > li > a {
        padding: 16px 28px;
        font-size: 0.95rem;
        font-weight: 600;
        display: flex;
        align-items: center;
        justify-content: space-between;
        border-bottom: none;
        transition: var(--sf-transition-fast);
        color: rgba(255,255,255,0.9);
    }
    .sf-nav > li > a::after,
    .sf-nav > li > a::before { display: none !important; }
    .sf-nav > li > a:active {
        background: rgba(255,149,0,0.1);
        padding-left: 32px;
        color: var(--sf-accent);
    }
    .sf-nav > li.current-menu-item > a {
        color: var(--sf-accent);
        background: linear-gradient(90deg, rgba(255,149,0,0.12), transparent);
        border-left: 4px solid var(--sf-accent);
        padding-left: 24px;
    }

    /* 子菜单手风琴 */
    .sf-nav .sub-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        padding: 0 0 8px 24px;
        background: transparent;
        backdrop-filter: none;
        border: none;
        border-radius: 0;
        border-top: none !important;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.4s ease;
    }
    .sf-nav .sub-menu::before { display: none !important; }
    .sf-nav li:hover > .sub-menu { max-height: 0; }
    .sf-nav li.sub-open > .sub-menu { max-height: 500px; }
    .sf-nav .sub-menu a {
        padding: 12px 28px;
        font-size: 0.85rem;
        color: rgba(255,255,255,0.65);
        border-bottom: 1px solid rgba(255,255,255,0.05);
        border-left: none !important;
    }
    .sf-nav .sub-menu a::before { display: none !important; }
    .sf-nav .sub-menu a:active {
        background: rgba(255,149,0,0.08);
        color: var(--sf-accent);
        padding-left: 28px !important;
    }

    /* CTA按钮在移动端 */
    .sf-nav-cta { margin: 20px 28px 0; }
    .sf-nav-cta a {
        display: block;
        text-align: center;
        padding: 14px !important;
    }

    /* —— Hero 英雄区 —— */
    .sf-hero { min-height: 60vh; padding: 60px 0; }
    .sf-hero-content { text-align: center; }
    .sf-hero h1 { font-size: clamp(1.6rem, 7vw, 2.5rem); }
    .sf-hero-subtitle { font-size: 0.9rem; line-height: 1.6; }
    .sf-hero-buttons { flex-direction: column; gap: 12px; }
    .sf-hero-buttons .sf-btn { width: 100%; }
    .sf-hero-scroll { display: none; }

    /* —— 关于我们 —— */
    .sf-about-grid { grid-template-columns: 1fr !important; }
    .sf-mvv-grid { grid-template-columns: 1fr !important; }
    .sf-timeline-track { flex-direction: column; gap: 20px; }
    .sf-timeline-item { flex-direction: row !important; align-items: flex-start; gap: 15px; }
    .sf-evolution-chart { gap: 8px; }
    .sf-evolution-bar { width: 40px !important; }

    /* —— 承诺/优势 —— */
    .sf-promise-features, .sf-service-features { grid-template-columns: 1fr; gap: 20px; }

    /* —— 数据统计 —— */
    .sf-stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
    .sf-stat-number { font-size: clamp(1.8rem, 5vw, 2.5rem); }

    /* —— 产品 —— */
    .sf-products-grid { grid-template-columns: 1fr; }
    .sf-product-cats {
        justify-content: flex-start;
        gap: 8px;
        margin-bottom: 28px;
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        padding: 14px;
        border-radius: var(--sf-radius-lg);
    }
    .sf-product-cats::-webkit-scrollbar { display: none; }
    .sf-product-cats::before { width: 50px; }
    .sf-product-cat {
        font-size: 0.75rem;
        padding: 8px 16px;
        white-space: nowrap;
        flex-shrink: 0;
        border-width: 1.5px;
    }

    /* —— 全球网络 —— */
    .sf-global-points { grid-template-columns: 1fr; }
    .sf-network-map svg { width: 100%; height: auto; }
    .sf-global-network { padding: 50px 0; }
    .sf-global-network-grid,
    .sf-global-network-content { grid-template-columns: 1fr !important; gap: 30px; }
    .sf-global-network-text { text-align: center; }
    .sf-global-network-text .sf-title-tag { margin: 0 auto 15px; }
    .sf-global-network-text .sf-btn,
    .sf-global-network-cta { margin: 0 auto; }
    .sf-global-network-map-wrap { min-height: 200px; }
    .sf-global-network-map-wrap .sf-map-label { font-size: 0.65rem; }

    /* —— 联系 —— */
    .sf-contact-grid { grid-template-columns: 1fr !important; }
    .sf-cta-blocks { grid-template-columns: 1fr; }

    /* —— 页脚 —— */
    .sf-footer-grid { grid-template-columns: 1fr !important; gap: 30px; }
    .sf-footer-bottom .sf-container { flex-direction: column; gap: 12px; text-align: center; }

    /* —— 内页 —— */
    .sf-page-header { padding: 55px 0 40px; }
    .sf-page-header h1 { font-size: clamp(1.5rem, 6vw, 2rem); letter-spacing: 1px; }
    .sf-page-header h1::after { width: 50px; height: 2px; bottom: -14px; }
    .sf-page-header .sf-page-subtitle { font-size: 0.88rem; line-height: 1.6; margin-top: 26px; }
    .sf-breadcrumb { font-size: 0.7rem; padding: 5px 14px; }
    .sf-breadcrumb .sf-sep { margin: 0 6px; }
    .sf-content-area { padding: 50px 0; }
    .sf-archive-header { padding: 50px 0; }

    /* —— 标签页 —— */
    .sf-tabs {
        overflow-x: auto;
        flex-wrap: nowrap;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        margin-bottom: 28px;
    }
    .sf-tabs::-webkit-scrollbar { display: none; }
    .sf-tab { padding: 12px 18px; font-size: 0.82rem; white-space: nowrap; flex-shrink: 0; }
    .sf-tab::before { display: none !important; }
    .sf-tab.active::after { font-size: 0.8rem; bottom: -8px; }

    /* —— 通用 —— */
    .sf-section { padding: 50px 0 !important; }
    .sf-section-lg { padding: 60px 0; }
    .sf-section-title { margin-bottom: 35px; }
    .sf-section-title h2 { font-size: clamp(1.4rem, 5vw, 2rem); padding-bottom: 18px; }
    .sf-section-title p { font-size: 0.88rem; line-height: 1.6; }
    .sf-title-tag { font-size: 0.7rem; padding: 5px 14px; margin-bottom: 15px; }
    .sf-container { padding: 0 20px; }

    /* —— 产品详情 —— */
    .sf-product-detail-grid { grid-template-columns: 1fr !important; }
    .sf-product-gallery { position: static !important; }
    .sf-product-info { position: static !important; }

    /* —— 按钮 —— */
    .sf-btn { padding: 10px 24px; font-size: 0.85rem; }
    .sf-btn-lg { padding: 12px 30px; }

    /* —— 返回顶部 —— */
    #sfBackTop { bottom: 20px; right: 20px; width: 44px; height: 44px; }
}

/* —— 超小屏幕适配 (480px) —— */
@media (max-width: 480px) {
    .sf-stats-grid { grid-template-columns: 1fr; }
    .sf-stats-grid .sf-stat-item { text-align: center; }
    .sf-hero { min-height: 50vh; padding: 40px 0; }
    .sf-hero h1 { font-size: clamp(1.3rem, 6vw, 1.8rem); }
    .sf-hero-subtitle { font-size: 0.82rem; }
    .sf-section { padding: 40px 0 !important; }
    .sf-section-title h2 { font-size: clamp(1.2rem, 5vw, 1.6rem); }
    .sf-evolution-chart { gap: 5px; }
    .sf-evolution-bar { width: 30px !important; }
    .sf-evolution-bar em { font-size: 0.7rem; }
    .sf-evolution-bar span { font-size: 0.65rem; }
    .sf-container { padding: 0 16px; }
    .sf-btn { padding: 9px 20px; font-size: 0.8rem; width: 100%; }
    .sf-hero-buttons .sf-btn { width: 100%; }
    .sf-about-buttons { flex-direction: column; }
    .sf-about-buttons .sf-btn { width: 100%; }
    .sf-page-header { padding: 45px 0 35px; }
    .sf-page-header h1 { font-size: clamp(1.3rem, 5.5vw, 1.7rem); }
}

/* —— 平板适配 (769px-992px) —— */
@media (min-width: 769px) and (max-width: 992px) {
    .sf-nav > li > a { padding: 10px 14px; font-size: 0.82rem; }
    .sf-nav { gap: 2px; }
    .sf-nav-cta { margin-left: 10px; }
    .sf-nav-cta a { padding: 10px 22px !important; }
    .sf-logo a { font-size: 1.4rem; }
    .sf-logo .sf-logo-icon { width: 42px; height: 42px; }
}

/* ==========================================================================
   v3.9.6 修复补丁 —— 补齐缺失组件样式 & 全终端响应式
   ========================================================================== */

/* ---------- 使命 / 愿景 / 价值观 卡片 (首页) ---------- */
.sf-mvv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.sf-mvv-card {
    position: relative;
    background: #fff;
    border: 1px solid var(--sf-border);
    border-top: 4px solid var(--sf-accent);
    border-radius: var(--sf-radius-lg);
    padding: 42px 32px;
    text-align: center;
    box-shadow: var(--sf-shadow-sm);
    transition: var(--sf-transition);
    overflow: hidden;
}
.sf-mvv-card:hover { transform: translateY(-8px); box-shadow: var(--sf-shadow-hover); }
.sf-mvv-icon {
    width: 72px; height: 72px;
    margin: 0 auto 22px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.6rem;
    color: var(--sf-accent-dark);
    background: linear-gradient(135deg, rgba(245,158,11,0.12), rgba(13,35,64,0.06));
    border: 2px solid var(--sf-accent);
    border-radius: 50%;
    transition: var(--sf-transition);
}
.sf-mvv-card:hover .sf-mvv-icon { background: var(--sf-accent-gradient); color: #fff; transform: scale(1.08); }
.sf-mvv-card h4 { margin-bottom: 14px; color: var(--sf-primary); }
.sf-mvv-card p { color: var(--sf-text-light); font-size: var(--sf-text-sm); line-height: 1.8; margin: 0; }

/* ---------- 产品优势 卡片 (首页) ---------- */
.sf-adv-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
.sf-adv-card {
    background: #fff;
    border-radius: var(--sf-radius-lg);
    padding: 35px 28px;
    box-shadow: var(--sf-shadow-sm);
    border-left: 4px solid var(--sf-accent);
    transition: var(--sf-transition);
}
.sf-adv-card:hover { transform: translateY(-6px); box-shadow: var(--sf-shadow-hover); }
.sf-adv-icon {
    width: 56px; height: 56px;
    margin-bottom: 18px;
    display: flex; align-items: center; justify-content: center;
    font-size: 1.3rem;
    color: var(--sf-accent);
    background: var(--sf-primary-gradient);
    border-radius: var(--sf-radius-md);
}
.sf-adv-card h4 { margin-bottom: 12px; }
.sf-adv-card p { color: var(--sf-text-light); font-size: var(--sf-text-sm); line-height: 1.8; margin: 0; }

/* ---------- 发展历程 时间线 (首页 · 横向) ---------- */
.sf-timeline-title { text-align: center; margin-bottom: 45px; }
.sf-timeline-track { display: flex; gap: 20px; position: relative; }
.sf-timeline-track::before {
    content: '';
    position: absolute;
    top: 9px; left: 6%; right: 6%;
    height: 3px;
    background: linear-gradient(90deg, transparent, rgba(245,158,11,0.55), transparent);
}
.sf-timeline-item {
    flex: 1 1 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    position: relative;
}
.sf-timeline-dot {
    width: 18px; height: 18px;
    flex-shrink: 0;
    margin-bottom: 18px;
    border-radius: 50%;
    background: #fff;
    border: 4px solid var(--sf-accent);
    box-shadow: 0 0 0 4px rgba(245,158,11,0.15);
    z-index: 1;
}
.sf-timeline-year {
    font-size: 1.4rem;
    font-weight: 900;
    color: var(--sf-accent);
    line-height: 1;
    margin-bottom: 12px;
}
.sf-timeline-content h5 { margin-bottom: 8px; color: var(--sf-primary); }
.sf-timeline-content p { color: var(--sf-text-light); font-size: var(--sf-text-sm); line-height: 1.75; margin: 0; }

/* ---------- 发展历程 时间线 (公司历史 · 纵向) ---------- */
.sf-timeline-vertical { position: relative; max-width: 900px; margin: 0 auto; padding: 10px 0; }
.sf-timeline-vertical::before {
    content: '';
    position: absolute;
    top: 0; bottom: 0; left: 50%;
    width: 3px; margin-left: -1.5px;
    background: linear-gradient(180deg, transparent, rgba(245,158,11,0.5), transparent);
}
.sf-timeline-vertical .sf-timeline-item { display: block; width: 50%; padding: 0 45px 40px; }
.sf-timeline-vertical .sf-timeline-item.sf-timeline-left { left: 0; text-align: right; }
.sf-timeline-vertical .sf-timeline-item.sf-timeline-right { left: 50%; text-align: left; }
.sf-timeline-vertical .sf-timeline-dot { position: absolute; top: 8px; margin: 0; z-index: 1; }
.sf-timeline-vertical .sf-timeline-left .sf-timeline-dot { right: -9px; }
.sf-timeline-vertical .sf-timeline-right .sf-timeline-dot { left: -9px; }
.sf-timeline-vertical .sf-timeline-content {
    background: #fff;
    border-radius: var(--sf-radius-lg);
    padding: 28px 30px;
    box-shadow: var(--sf-shadow);
    border-top: 3px solid var(--sf-accent);
}
.sf-timeline-vertical .sf-timeline-year {
    display: inline-block;
    font-size: 1.05rem;
    font-weight: 900;
    color: #fff;
    background: var(--sf-accent-gradient);
    padding: 4px 18px;
    border-radius: var(--sf-radius-full);
    margin-bottom: 14px;
    line-height: 1.6;
}
.sf-timeline-vertical .sf-timeline-content h4 { margin-bottom: 8px; }
.sf-timeline-vertical .sf-timeline-content p { color: var(--sf-text-light); font-size: var(--sf-text-sm); line-height: 1.8; margin: 0; }

/* ---------- 数据块 & 里程碑 (公司历史 / 关键数据) ---------- */
.sf-grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 30px; }
.sf-stat-block {
    text-align: center;
    padding: 40px 25px;
    background: var(--sf-bg-light);
    border-radius: var(--sf-radius-lg);
    border-top: 4px solid var(--sf-accent);
    transition: var(--sf-transition);
}
.sf-stat-block:hover { transform: translateY(-6px); box-shadow: var(--sf-shadow); }
.sf-stat-num {
    font-size: clamp(2.2rem, 4vw, 3.2rem);
    font-weight: 900;
    color: var(--sf-primary);
    line-height: 1;
    margin-bottom: 12px;
}
.sf-stat-block p { color: var(--sf-text-light); margin: 0; }

/* ---------- 通用响应式网格工具 ---------- */
.sf-grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; }
.sf-grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
.sf-doc-layout { display: grid; grid-template-columns: 260px 1fr; gap: 50px; max-width: 1200px; margin: 0 auto; }

/* ---------- 产品分类筛选 (首页) ---------- */
.sf-product-cats {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 12px;
    margin-bottom: 45px;
    position: relative;
}
.sf-product-cat {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 11px 24px;
    border: 2px solid var(--sf-border);
    border-radius: var(--sf-radius-full);
    background: #fff;
    color: var(--sf-text-body);
    font-size: var(--sf-text-sm);
    font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: var(--sf-transition);
}
.sf-product-cat i { color: var(--sf-accent); }
.sf-product-cat:hover { border-color: var(--sf-accent); color: var(--sf-primary); transform: translateY(-2px); box-shadow: var(--sf-shadow-sm); }
.sf-product-cat.active { background: var(--sf-accent-gradient); border-color: transparent; color: #fff; box-shadow: 0 6px 20px rgba(245,158,11,0.35); }
.sf-product-cat.active i { color: #fff; }

/* ---------- 徽章 ---------- */
.sf-badge {
    display: inline-block;
    padding: 5px 16px;
    margin-bottom: 14px;
    border-radius: var(--sf-radius-full);
    font-size: var(--sf-text-xs);
    font-weight: 600;
    letter-spacing: 0.5px;
    background: rgba(255,255,255,0.12);
    color: #fff;
    border: 1px solid rgba(255,255,255,0.25);
}
.sf-badge-accent {
    background: var(--sf-accent-gradient);
    color: #fff;
    border-color: transparent;
    box-shadow: 0 4px 15px rgba(245,158,11,0.35);
}

/* ---------- 侧边栏 & 小工具 ---------- */
.sf-sidebar { display: block; }
.sf-widget {
    background: var(--sf-bg-light);
    border: 1px solid var(--sf-border);
    border-radius: var(--sf-radius-lg);
    padding: 28px;
    margin-bottom: 25px;
}
.sf-widget-title {
    margin-bottom: 18px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--sf-accent);
    font-size: var(--sf-h5);
}
.sf-widget ul { list-style: none; padding: 0; margin: 0; }
.sf-widget ul li { padding: 8px 0; border-bottom: 1px solid var(--sf-border); font-size: var(--sf-text-sm); }
.sf-widget ul li:last-child { border-bottom: none; }
.sf-widget a { color: var(--sf-text-body); }
.sf-widget a:hover { color: var(--sf-accent); }

/* ---------- 全球网络 2 列变体 (全球网络页) ---------- */
.sf-points-2 { grid-template-columns: repeat(2, 1fr); }

/* ---------- 法务/资料页 侧栏目录 ---------- */
.sf-toc { position: sticky; top: 110px; align-self: start; }

/* ---------- 时间线 / 网格 响应式补丁 ---------- */
@media (max-width: 992px) {
    .sf-mvv-grid,
    .sf-adv-grid,
    .sf-grid-3,
    .sf-grid-4 { grid-template-columns: repeat(2, 1fr); }
    .sf-timeline-track { flex-wrap: wrap; row-gap: 32px; }
    .sf-timeline-track::before { display: none; }
    .sf-timeline-item { flex: 1 1 45%; }
}
@media (max-width: 768px) {
    .sf-mvv-grid,
    .sf-adv-grid,
    .sf-grid-2,
    .sf-grid-3,
    .sf-grid-4,
    .sf-points-2,
    .sf-doc-layout { grid-template-columns: 1fr; }
    .sf-doc-layout { gap: 28px; }
    .sf-toc { position: static; }
    /* 纵向时间线：移动端单列折线 */
    .sf-timeline-vertical { padding-left: 4px; }
    .sf-timeline-vertical::before { left: 9px; margin-left: 0; }
    .sf-timeline-vertical .sf-timeline-item,
    .sf-timeline-vertical .sf-timeline-item.sf-timeline-right { left: 0; width: 100%; text-align: left; padding: 0 0 32px 38px; }
    .sf-timeline-vertical .sf-timeline-left .sf-timeline-dot,
    .sf-timeline-vertical .sf-timeline-right .sf-timeline-dot { left: 0; right: auto; }
    /* 横向时间线：移动端转为列表 */
    .sf-timeline-item { flex: 1 1 100%; flex-direction: row !important; align-items: flex-start; text-align: left; gap: 15px; }
    .sf-timeline-dot { margin-bottom: 0; }
    .sf-timeline-year { margin-bottom: 4px; }
}
@media (max-width: 640px) {
    .sf-form-row { grid-template-columns: 1fr; gap: 16px; }
}
/* 中等宽度下压缩导航，消除横向溢出 */
@media (min-width: 993px) and (max-width: 1300px) {
    .sf-nav { gap: 0; }
    .sf-nav > li > a { padding: 12px 16px; }
    .sf-nav-cta { margin-left: 14px; }
}