/* ===== 基础变量与重置 ===== */
:root {
    --primary: #1a5fb4;
    --primary-dark: #154a8c;
    --primary-light: #e8f0fe;
    --accent: #e66100;
    --accent-light: #fff4e6;
    --text: #1c1c1c;
    --text-secondary: #5a5a5a;
    --text-light: #8a8a8a;
    --bg: #ffffff;
    --bg-light: #f8f9fa;
    --bg-dark: #1c1c1c;
    --border: #e5e7eb;
    --border-light: #f0f0f0;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-lg: 0 10px 40px rgba(0,0,0,0.12);
    --radius: 12px;
    --radius-sm: 8px;
    --transition: all 0.3s ease;
    --max-width: 1200px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--text);
    line-height: 1.6;
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

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

/* ===== 容器 ===== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== 按钮系统 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 15px;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
}

.btn-large {
    padding: 16px 32px;
    font-size: 17px;
    border-radius: var(--radius);
}

.btn-card {
    width: 100%;
    margin-top: auto;
    background: var(--primary-light);
    color: var(--primary);
}

.btn-card:hover {
    background: var(--primary);
    color: white;
}

.btn-submit {
    width: 100%;
    padding: 16px;
    font-size: 17px;
    background: var(--primary);
    color: white;
}

.btn-submit:hover {
    background: var(--primary-dark);
}

.btn-whatsapp {
    background: #25d366;
    color: white;
}

.btn-whatsapp:hover {
    background: #1fad52;
}

.btn-telegram {
    background: #0088cc;
    color: white;
}

.btn-telegram:hover {
    background: #006699;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-light);
    padding: 0;
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 24px;
    color: var(--text);
    margin-left: -8px;
}

.logo-text span {
    color: var(--primary);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-menu a {
    font-weight: 500;
    font-size: 15px;
    color: var(--text-secondary);
    position: relative;
}

.nav-menu a:hover {
    color: var(--primary);
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

.nav-menu a:hover::after {
    width: 100%;
}

.nav-cta {
    padding: 10px 20px;
    font-size: 14px;
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--text);
}

/* ===== Hero Banner ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../assets/hero-warehouse.png') center/cover no-repeat;
    z-index: -1;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, rgba(10,15,30,0.75) 0%, rgba(10,15,30,0.4) 40%, rgba(10,15,30,0.1) 70%, transparent 100%);
}

.hero-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(10,15,30,0.3) 0%, transparent 30%, transparent 70%, rgba(10,15,30,0.4) 100%);
}

.hero-content {
    max-width: 700px;
}

.hero h1 {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 20px;
    color: #ffffff;
    text-shadow: 0 2px 12px rgba(0,0,0,0.4);
}

.hero-subtitle {
    font-size: clamp(16px, 2vw, 20px);
    color: rgba(255,255,255,0.85);
    margin-bottom: 28px;
    line-height: 1.5;
    text-shadow: 0 1px 8px rgba(0,0,0,0.3);
}

.hero-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 32px;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(8px);
    border-radius: 100px;
    font-size: 14px;
    font-weight: 500;
    color: rgba(255,255,255,0.95);
    border: 1px solid rgba(255,255,255,0.2);
}

.hero-cta {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.hero-note {
    font-size: 15px;
    color: rgba(255,255,255,0.7);
    text-shadow: 0 1px 6px rgba(0,0,0,0.3);
}

.hero-note strong {
    color: var(--accent);
}

/* ===== 通用区块标题 ===== */
.section-title {
    font-size: clamp(28px, 3vw, 36px);
    font-weight: 700;
    text-align: center;
    margin-bottom: 12px;
    color: var(--text);
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 17px;
    margin-bottom: 48px;
}

/* ===== 产品分类 ===== */
.catalog {
    padding: 100px 0;
    background: var(--bg);
}

.catalog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.catalog-card {
    background: white;
    border-radius: var(--radius);
    padding: 0 0 32px;
    border: 1px solid var(--border);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    min-height: 420px;
    overflow: hidden;
}

.catalog-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.catalog-card-header {
    height: 200px;
    display: flex;
    align-items: flex-end;
    justify-content: flex-start;
    position: relative;
    overflow: hidden;
    padding: 16px;
}

.catalog-card-header.electronics { background: url('../assets/electronics.jpg') center/cover no-repeat; }
.catalog-card-header.it { background: url('../assets/it-infra.jpg') center/cover no-repeat; }
.catalog-card-header.automation { background: url('../assets/automation.png') center/cover no-repeat; }

.catalog-card-header .card-icon-svg {
    display: none;
}

.catalog-card-header::after {
    content: '';
    position: absolute;
    bottom: -30px;
    left: 0;
    right: 0;
    height: 60px;
    background: white;
    border-radius: 50% 50% 0 0;
}

.catalog-card-body {
    padding: 0 32px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.catalog-card h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text);
}

.card-list {
    list-style: none;
    margin-bottom: 24px;
    flex-grow: 1;
}

.card-list li {
    padding: 8px 0;
    color: var(--text-secondary);
    font-size: 15px;
    border-bottom: 1px solid var(--border-light);
    position: relative;
    padding-left: 20px;
}

.card-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

.card-list li:last-child {
    border-bottom: none;
}

.catalog-card .btn-card {
    margin: 0 32px;
}

/* ===== 为什么选择我们 ===== */
.trust {
    padding: 100px 0 80px;
    background: #F8FAFC url('../assets/why-choose-us-bg.svg') center/cover no-repeat;
    position: relative;
}

.trust .container {
    position: relative;
    z-index: 1;
}

.trust-header {
    text-align: center;
    margin-bottom: 56px;
}

.trust-header h2 {
    font-size: clamp(32px, 4vw, 40px);
    font-weight: 700;
    color: #111827;
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.trust-header p {
    font-size: 18px;
    color: #6B7280;
    max-width: 640px;
    margin: 0 auto;
    line-height: 1.6;
}

/* Stats row */
.trust-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    max-width: 1000px;
    margin: 0 auto 64px;
}

.trust-stat {
    text-align: center;
    padding: 32px 20px;
    background: white;
    border-radius: 20px;
    box-shadow: 0 4px 24px rgba(37, 99, 235, 0.06);
    border: 1px solid rgba(37, 99, 235, 0.08);
    transition: all 0.35s ease;
}

.trust-stat:hover {
    transform: translateY(-6px) scale(1.02);
    box-shadow: 0 12px 40px rgba(37, 99, 235, 0.12);
}

.trust-stat-num {
    display: block;
    font-size: 42px;
    font-weight: 800;
    color: #2563EB;
    line-height: 1;
    margin-bottom: 10px;
    letter-spacing: -1px;
}

.trust-stat-label {
    font-size: 15px;
    color: #6B7280;
    font-weight: 500;
}

/* Cards grid */
.trust-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    max-width: 1200px;
    margin: 0 auto;
}

.trust-card {
    text-align: center;
    padding: 40px 28px;
    background: white;
    border-radius: 20px;
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.04);
    border: 1px solid rgba(0, 0, 0, 0.04);
    transition: all 0.35s ease;
}

.trust-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 20px 48px rgba(37, 99, 235, 0.1);
    border-color: rgba(37, 99, 235, 0.12);
}

.trust-icon-wrap {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    background: #DBEAFE;
}

.trust-icon {
    width: 32px;
    height: 32px;
    stroke: #2563EB;
    stroke-width: 2;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.trust-card h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #111827;
}

.trust-card p {
    font-size: 14px;
    color: #6B7280;
    line-height: 1.6;
    margin: 0;
}

/* Responsive */
@media (max-width: 1024px) {
    .trust-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    .trust-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
}

@media (max-width: 640px) {
    .trust-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    .trust-stat-num {
        font-size: 32px;
    }
    .trust-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .trust-card {
        padding: 32px 24px;
    }
}

/* ===== 工作流程 ===== */
.process {
    padding: 100px 0;
    background: url('../assets/process-bg.png') center/cover no-repeat;
    position: relative;
}

.process::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(255, 255, 255, 0.82);
    pointer-events: none;
    z-index: 0;
}

.process .container {
    position: relative;
    z-index: 1;
}

.process-header {
    text-align: center;
    margin-bottom: 64px;
}

.process-header h2 {
    font-size: clamp(32px, 4vw, 40px);
    font-weight: 700;
    color: #111827;
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.process-header p {
    font-size: 18px;
    color: #6B7280;
    max-width: 520px;
    margin: 0 auto;
    line-height: 1.6;
}

.process-steps {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 0;
    max-width: 1200px;
    margin: 0 auto;
    position: relative;
    padding-bottom: 48px;
}

/* 底部贯穿的时间轴线 */
.process-steps::before {
    content: '';
    position: absolute;
    bottom: 14px;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #93C5FD 0%, #2563EB 25%, #2563EB 75%, #93C5FD 100%);
    border-radius: 2px;
    z-index: 0;
}

.step {
    flex: 1;
    min-width: 0;
    text-align: center;
    padding: 32px 16px 56px;
    position: relative;
    transition: all 0.35s ease;
    border-radius: 16px;
}

.step:hover {
    transform: translateY(-6px);
    box-shadow: 0 16px 40px rgba(37, 99, 235, 0.08);
    background: rgba(255,255,255,0.8);
}

/* 步骤节点 - 时间轴上的圆点 */
.step::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 24px;
    background: #2563EB;
    border-radius: 50%;
    border: 4px solid #FFFFFF;
    box-shadow: 0 0 0 4px #DBEAFE;
    z-index: 2;
}

/* 从步骤卡片到时间轴的竖线 */
.step::before {
    content: '';
    position: absolute;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 32px;
    background: linear-gradient(to bottom, transparent, #93C5FD);
    z-index: 1;
}

/* 隐藏旧的 step-connector */
.step-connector {
    display: none;
}

.step-icon-wrap {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    background: #DBEAFE;
    position: relative;
}

.step-icon {
    width: 28px;
    height: 28px;
    stroke: #2563EB;
    stroke-width: 2;
    fill: none;
    stroke-linecap: round;
    stroke-linejoin: round;
}

.step-num {
    position: absolute;
    top: -4px;
    right: -4px;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: #2563EB;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 11px;
    border: 2px solid #FFFFFF;
    box-shadow: 0 2px 6px rgba(37, 99, 235, 0.25);
}

.step h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #111827;
    line-height: 1.3;
}

.step p {
    font-size: 14px;
    color: #6B7280;
    line-height: 1.6;
    margin: 0;
}

/* Responsive */
@media (max-width: 1024px) {
    .process-steps {
        flex-wrap: wrap;
        max-width: 800px;
        padding-bottom: 0;
    }
    .process-steps::before {
        display: none;
    }
    .step {
        flex: 0 0 calc(33.333% - 20px);
        min-width: 180px;
        padding-bottom: 32px;
    }
    .step::after,
    .step::before {
        display: none;
    }
    .step:nth-child(3) { margin-right: 0; }
    .step:nth-child(4) { margin-left: 0; }
}

@media (max-width: 768px) {
    .step {
        flex: 0 0 calc(50% - 16px);
        min-width: 160px;
        padding: 24px 12px;
    }
}

@media (max-width: 480px) {
    .process-steps {
        flex-direction: column;
        align-items: center;
    }
    .step {
        flex: 0 0 auto;
        width: 100%;
        max-width: 320px;
        padding: 24px 20px;
    }
}

/* ===== CTA区块 ===== */
.cta-section {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    text-align: center;
    color: white;
}

.cta-section h2 {
    font-size: clamp(28px, 3vw, 36px);
    font-weight: 700;
    margin-bottom: 12px;
}

.cta-section p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 32px;
}

.cta-section .btn-primary {
    background: white;
    color: var(--primary);
}

.cta-section .btn-primary:hover {
    background: var(--accent-light);
    transform: translateY(-2px);
}

/* ===== 关于我们 ===== */
.about {
    padding: 100px 0;
    background: url('../assets/about-bg.jpg') center/cover no-repeat;
    position: relative;
    overflow: hidden;
}

.about::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, rgba(255,255,255,0.92) 0%, rgba(255,255,255,0.78) 45%, rgba(255,255,255,0.35) 75%, rgba(255,255,255,0.1) 100%);
    pointer-events: none;
    z-index: 0;
}

.about::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(255,255,255,0.4) 0%, transparent 20%, transparent 80%, rgba(255,255,255,0.4) 100%);
    pointer-events: none;
    z-index: 0;
}

.about-grid {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.about-text h2 {
    font-size: clamp(28px, 3vw, 36px);
    font-weight: 700;
    margin-bottom: 24px;
    text-align: center;
}

.about-text p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 14px;
    line-height: 1.7;
}

.about-lead {
    font-size: 20px !important;
    font-weight: 600;
    color: var(--text) !important;
    text-align: center;
    margin-bottom: 24px !important;
}

.about-subtitle {
    font-size: 22px;
    font-weight: 600;
    color: var(--text);
    margin-top: 40px;
    margin-bottom: 16px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--primary-light);
}

.about-list {
    list-style: none;
    margin-bottom: 24px;
}

.about-list li {
    padding: 8px 0;
    color: var(--text-secondary);
    font-size: 15px;
    line-height: 1.6;
    position: relative;
    padding-left: 20px;
}

.about-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
}

.about-list-numbered li {
    padding-left: 36px;
}

.about-list-numbered li::before {
    content: none;
}

.about-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    font-size: 13px;
    font-weight: 700;
    margin-right: 10px;
    flex-shrink: 0;
}

.about-slogan {
    font-size: 18px !important;
    font-weight: 600;
    color: var(--primary) !important;
    text-align: center;
    margin-top: 24px !important;
    padding: 16px;
    background: var(--primary-light);
    border-radius: var(--radius-sm);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 48px;
    padding-top: 48px;
    border-top: 1px solid var(--border);
}

.stat {
    text-align: center;
}

.stat-num {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
}

/* ===== 联系方式 ===== */
.contacts {
    padding: 100px 0;
    background: var(--bg);
}

.contacts-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 24px;
    max-width: 900px;
    margin: 0 auto;
}

.contact-card {
    text-align: center;
    padding: 32px 24px;
    background: var(--bg-light);
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.contact-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: var(--primary-light);
}

.contact-icon {
    font-size: 32px;
    margin-bottom: 12px;
}

.contact-card h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text);
}

.contact-card a {
    font-size: 15px;
    color: var(--primary);
    font-weight: 500;
}

.contact-card a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* ===== 页脚 ===== */
.footer {
    padding: 60px 0 0;
    background: var(--bg-dark);
    color: white;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 20px;
    margin-bottom: 16px;
}

.footer-desc {
    font-size: 14px;
    color: rgba(255,255,255,0.6);
    line-height: 1.6;
    margin-bottom: 16px;
}

.footer-col h4 {
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 16px;
    color: rgba(255,255,255,0.9);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    font-size: 14px;
    color: rgba(255,255,255,0.6);
    transition: var(--transition);
}

.footer-links a:hover {
    color: white;
}

.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-contact-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.footer-contact-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    margin-top: 2px;
}

.footer-contact-icon.email { stroke: #ea4335; }
.footer-contact-icon.whatsapp { fill: #25d366; }
.footer-contact-icon.telegram { fill: #0088cc; }
.footer-contact-icon.phone { stroke: var(--primary); }
.footer-contact-icon.wechat { fill: #07c160; }

.footer-contact-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.footer-contact-label {
    font-size: 12px;
    color: rgba(255,255,255,0.5);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-contact-value {
    font-size: 14px;
    color: rgba(255,255,255,0.85);
    line-height: 1.5;
}

.footer-contact-value a {
    color: rgba(255,255,255,0.85);
    transition: var(--transition);
}

.footer-contact-value a:hover {
    color: white;
}

.footer-qr {
    text-align: center;
}

.footer-qr img {
    width: 120px;
    height: 120px;
    border-radius: var(--radius-sm);
    margin-bottom: 8px;
    background: white;
    padding: 4px;
}

.footer-qr p {
    font-size: 12px;
    color: rgba(255,255,255,0.5);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 20px 0;
    text-align: center;
}

.footer-copy {
    font-size: 13px;
    color: rgba(255,255,255,0.4);
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
}

@media (max-width: 480px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== RFQ 表单页面 ===== */
.rfq-page {
    padding: 120px 0 80px;
    background: var(--bg-light);
    min-height: 100vh;
}

.rfq-header {
    text-align: center;
    margin-bottom: 48px;
}

.rfq-header h1 {
    font-size: clamp(28px, 3vw, 40px);
    font-weight: 700;
    margin-bottom: 12px;
}

.rfq-header p {
    font-size: 17px;
    color: var(--text-secondary);
}

.rfq-layout {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 40px;
    align-items: start;
}

.rfq-form-wrapper {
    background: white;
    border-radius: var(--radius);
    padding: 40px;
    border: 1px solid var(--border);
}

.rfq-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
}

.form-group .required {
    color: var(--accent);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
    background: white;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-light);
}

.form-group select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23666' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group input[type="file"] {
    padding: 8px;
    border-style: dashed;
}

.file-hint {
    font-size: 13px;
    color: var(--text-light);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-checkbox {
    flex-direction: row !important;
    align-items: flex-start;
    gap: 10px;
}

.form-checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin-top: 2px;
    cursor: pointer;
    accent-color: var(--primary);
}

.form-checkbox label {
    font-weight: 400;
    font-size: 14px;
    color: var(--text-secondary);
    cursor: pointer;
}

.form-note {
    text-align: center;
    font-size: 14px;
    color: var(--text-light);
    margin-top: 8px;
}

/* 侧边栏 */
.rfq-sidebar {
    display: flex;
    flex-direction: column;
    gap: 20px;
    position: sticky;
    top: 100px;
}

.sidebar-card {
    background: white;
    border-radius: var(--radius);
    padding: 24px;
    border: 1px solid var(--border);
}

.sidebar-card h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
}

.sidebar-icon-svg {
    width: 20px;
    height: 20px;
    stroke: var(--primary);
    flex-shrink: 0;
}

.sidebar-card p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.sidebar-link {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 14px;
    text-align: center;
    margin-bottom: 8px;
    transition: var(--transition);
}

.sidebar-link-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.sidebar-link.whatsapp {
    background: #25d366;
    color: white;
}

.sidebar-link.whatsapp:hover {
    background: #1fad52;
}

.sidebar-link.telegram {
    background: #0088cc;
    color: white;
}

.sidebar-link.telegram:hover {
    background: #006699;
}

.sidebar-list {
    list-style: none;
}

.sidebar-list li {
    padding: 6px 0;
    font-size: 14px;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--border-light);
    position: relative;
    padding-left: 18px;
}

.sidebar-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-weight: bold;
    font-size: 12px;
}

.sidebar-list li:last-child {
    border-bottom: none;
}

/* ===== 感谢页 ===== */
.thanks-page {
    padding: 160px 0 80px;
    background: var(--bg-light);
    min-height: 100vh;
    display: flex;
    align-items: center;
}

.thanks-box {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
    background: white;
    border-radius: var(--radius);
    padding: 60px 40px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
}

.thanks-icon {
    font-size: 64px;
    margin-bottom: 24px;
}

.thanks-box h1 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 16px;
}

.thanks-text {
    font-size: 17px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.thanks-sub {
    font-size: 15px;
    color: var(--text-light);
    margin-bottom: 24px;
}

.thanks-links {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 32px;
}

.thanks-redirect {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 20px;
}

/* ===== 响应式适配 ===== */
@media (max-width: 1024px) {
    .rfq-layout {
        grid-template-columns: 1fr;
    }

    .rfq-sidebar {
        position: static;
        flex-direction: row;
        flex-wrap: wrap;
    }

    .sidebar-card {
        flex: 1;
        min-width: 280px;
    }

    .process-steps {
        flex-direction: column;
        align-items: center;
    }

    .step-arrow {
        transform: rotate(90deg);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow);
    }

    .nav-menu.active {
        display: flex;
    }

    .mobile-toggle {
        display: block;
    }

    .nav-cta {
        display: none;
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-cta {
        flex-direction: column;
    }

    .hero-cta .btn {
        width: 100%;
    }

    .catalog-grid {
        grid-template-columns: 1fr;
    }

    .trust-grid {
        grid-template-columns: 1fr;
    }

    .about-stats {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .contacts-grid {
        grid-template-columns: 1fr;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .rfq-form-wrapper {
        padding: 24px;
    }

    .thanks-box {
        padding: 40px 24px;
    }

    .thanks-links {
        flex-direction: column;
    }

    .step {
        max-width: 100%;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .catalog-card {
        padding: 24px;
    }

    .rfq-form-wrapper {
        padding: 20px;
    }

    .btn-large {
        padding: 14px 24px;
        font-size: 16px;
    }
}

/* ===== 动画 ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.catalog-card,
.trust-item,
.step,
.contact-card {
    animation: fadeInUp 0.6s ease forwards;
}

.catalog-card:nth-child(2) { animation-delay: 0.1s; }
.catalog-card:nth-child(3) { animation-delay: 0.2s; }
.trust-item:nth-child(2) { animation-delay: 0.1s; }
.trust-item:nth-child(3) { animation-delay: 0.2s; }
.trust-item:nth-child(4) { animation-delay: 0.3s; }
.trust-item:nth-child(5) { animation-delay: 0.4s; }
.trust-item:nth-child(6) { animation-delay: 0.5s; }

/* ===== Quick Links Section ===== */
.quick-links {
    padding: 80px 0;
    background: var(--bg-light);
}

.quick-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    max-width: 900px;
    margin: 0 auto;
}

.quick-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 32px 24px;
    background: white;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    transition: var(--transition);
}

.quick-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.quick-icon {
    font-size: 40px;
    margin-bottom: 12px;
}

.quick-card h4 {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: 6px;
    color: var(--text);
}

.quick-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* ===== Hot Brands Section ===== */
.hot-brands {
    padding: 80px 0;
    background: var(--bg-light);
}

.hot-brands-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    justify-content: center;
    max-width: 1000px;
    margin: 0 auto 32px;
}

.hot-brand {
    padding: 12px 24px;
    background: white;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    font-size: 15px;
    font-weight: 600;
    color: var(--text-secondary);
    transition: var(--transition);
}

.hot-brand:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
    transform: translateY(-2px);
}

.hot-brands-cta {
    text-align: center;
}

/* ===== Partner Brands Section ===== */
.partner-brands {
    padding: 80px 0;
    background: var(--bg-light);
}

.partner-brands-img {
    max-width: 1000px;
    margin: 0 auto;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
    background: white;
}

.partner-brands-img img {
    width: 100%;
    height: auto;
    display: block;
}

/* ===== Service Industries Section ===== */
.service-industries {
    padding: 80px 0;
    background: var(--bg);
}

.industries-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 16px;
    max-width: 1200px;
    margin: 0 auto;
}

.industry-card {
    background: white;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: var(--transition);
    text-align: center;
}

.industry-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: var(--primary-light);
}

.industry-img {
    width: 100%;
    height: 140px;
    object-fit: cover;
    display: block;
}

.industry-icon {
    width: 48px;
    height: 48px;
    margin: 24px auto 8px;
    stroke: var(--primary);
    stroke-width: 1.5;
}

.industry-card h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    padding: 12px 8px 16px;
    margin: 0;
}

@media (max-width: 1024px) {
    .trust-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }
    .industries-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: 16px;
    }
}

@media (max-width: 768px) {
    .trust-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    .industries-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .industries-grid {
        grid-template-columns: 1fr;
    }
}
.lang-switcher {
    display: flex;
    gap: 4px;
    align-items: center;
}

.lang-link {
    padding: 4px 8px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-light);
    border-radius: 4px;
    transition: var(--transition);
}

.lang-link:hover {
    color: var(--primary);
    background: var(--primary-light);
}

.lang-link.active {
    color: var(--primary);
    background: var(--primary-light);
}

.nav-menu a.active {
    color: var(--primary);
}

.nav-menu a.active::after {
    width: 100%;
}

@media (max-width: 768px) {
    .lang-switcher {
        display: none;
    }
    .quick-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 480px) {
    .quick-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== Quick Nav (滚动后显示) ===== */
.quick-nav {
    position: fixed;
    right: 20px;
    top: 50%;
    transform: translateY(-50%) translateX(60px);
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 12px;
    opacity: 0;
    transition: all 0.4s ease;
    pointer-events: none;
}

.quick-nav.visible {
    transform: translateY(-50%) translateX(0);
    opacity: 1;
    pointer-events: auto;
}

.quick-nav a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--border);
    transition: var(--transition);
    position: relative;
    cursor: pointer;
}

.quick-nav a:hover,
.quick-nav a.active {
    background: var(--primary);
    transform: scale(1.4);
}

.quick-nav a::before {
    content: attr(data-label);
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
    background: var(--bg-dark);
    color: white;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
}

.quick-nav a:hover::before {
    opacity: 1;
}

@media (max-width: 1024px) {
    .quick-nav {
        display: none;
    }
}

/* ===== Mobile experience ===== */
@media (max-width: 768px) {
    html,
    body {
        overflow-x: hidden;
    }

    body.menu-open {
        overflow: hidden;
    }

    .container {
        padding-left: 18px;
        padding-right: 18px;
    }

    .navbar {
        background: rgba(255, 255, 255, 0.97);
        box-shadow: 0 1px 0 rgba(15, 23, 42, 0.08);
    }

    .navbar .container {
        height: 64px;
        gap: 8px;
    }

    .logo {
        margin-left: 0;
        margin-right: auto;
        font-size: 19px;
        line-height: 1;
        white-space: nowrap;
    }

    .navbar .lang-switcher {
        display: flex !important;
        gap: 2px;
        padding: 3px;
        margin-left: auto;
        background: #f1f5f9;
        border: 1px solid #e2e8f0;
        border-radius: 9px;
    }

    .navbar .lang-link {
        min-width: 27px;
        padding: 4px 5px;
        text-align: center;
        font-size: 10px;
        border-radius: 6px;
    }

    .navbar .lang-link.active {
        background: white;
        box-shadow: 0 1px 4px rgba(15, 23, 42, 0.12);
    }

    .mobile-toggle {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 36px;
        height: 36px;
        padding: 0;
        border-radius: 9px;
        background: #f1f5f9;
        font-size: 23px;
        line-height: 1;
    }

    .nav-menu {
        top: 72px;
        left: 12px;
        right: 12px;
        padding: 12px;
        gap: 4px;
        border: 1px solid var(--border);
        border-radius: 14px;
        box-shadow: 0 18px 45px rgba(15, 23, 42, 0.18);
    }

    .nav-menu a {
        display: block;
        padding: 12px 14px;
        border-radius: 9px;
        font-size: 15px;
    }

    .nav-menu a:hover,
    .nav-menu a.active {
        background: var(--primary-light);
        color: var(--primary);
    }

    .nav-menu a::after {
        display: none;
    }

    .hero {
        min-height: 720px;
        padding: 112px 0 72px;
        align-items: center;
    }

    .hero-bg {
        background-position: 58% center;
    }

    .hero-bg::before {
        background: linear-gradient(180deg, rgba(7, 15, 31, 0.55) 0%, rgba(7, 15, 31, 0.68) 48%, rgba(7, 15, 31, 0.82) 100%);
    }

    .hero h1 {
        font-size: clamp(32px, 9vw, 40px);
        margin-bottom: 16px;
    }

    .hero-subtitle {
        font-size: 16px;
        margin-bottom: 22px;
    }

    .hero-badges {
        gap: 8px;
        margin-bottom: 24px;
    }

    .badge {
        padding: 7px 11px;
        font-size: 12px;
    }

    .hero-note {
        text-align: center;
    }

    .catalog,
    .trust,
    .process,
    .partner-brands,
    .service-industries,
    .about,
    .contacts,
    .cta-section {
        padding: 64px 0;
    }

    .section-title,
    .trust-header h2,
    .process-header h2 {
        font-size: 28px;
        line-height: 1.25;
    }

    .section-subtitle,
    .trust-header p,
    .process-header p {
        font-size: 15px;
        margin-bottom: 32px;
    }

    .catalog-grid {
        gap: 18px;
    }

    .catalog-card {
        min-height: 0;
        padding: 0 0 24px;
        border-radius: 16px;
        box-shadow: 0 8px 26px rgba(15, 23, 42, 0.06);
    }

    .catalog-card-header {
        height: 165px;
    }

    .catalog-card-body {
        padding: 0 22px;
    }

    .catalog-card h3 {
        font-size: 20px;
        margin-bottom: 10px;
    }

    .card-list li {
        padding-top: 6px;
        padding-bottom: 6px;
        font-size: 14px;
    }

    .catalog-card .btn-card {
        margin: 0 22px;
    }

    .trust-header {
        margin-bottom: 34px;
    }

    .trust-stats {
        margin-bottom: 34px;
    }

    .trust-stat {
        padding: 22px 10px;
        border-radius: 15px;
    }

    .trust-stat-label {
        font-size: 12px;
    }

    .trust-card {
        padding: 26px 20px;
        border-radius: 16px;
    }

    .trust-icon-wrap {
        width: 58px;
        height: 58px;
        margin-bottom: 14px;
    }

    .process-steps {
        gap: 10px;
    }

    .step {
        padding: 20px 12px;
    }

    .partner-brands-img {
        overflow-x: auto;
        border-radius: 14px;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: thin;
    }

    .partner-brands-img img {
        min-width: 760px;
    }

    .industries-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .industry-img {
        height: 100px;
    }

    .industry-card h4 {
        font-size: 13px;
        padding: 10px 6px 12px;
    }

    .about::before {
        background: rgba(255, 255, 255, 0.9);
    }

    .about-subtitle {
        margin-top: 30px;
        font-size: 19px;
    }

    .about-list li {
        font-size: 14px;
    }

    .about-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
        margin-top: 32px;
        padding-top: 32px;
    }

    .stat-num {
        font-size: 27px;
    }

    .stat-label {
        font-size: 11px;
    }

    .footer {
        padding-top: 46px;
    }

    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }

    .footer-qr {
        text-align: left;
    }

    .rfq-page,
    .bom-page {
        padding: 96px 0 52px;
    }

    .rfq-header,
    .bom-header {
        margin-bottom: 28px;
    }

    .rfq-header h1,
    .bom-header h1 {
        font-size: 27px;
        line-height: 1.25;
    }

    .rfq-header p,
    .bom-header p {
        font-size: 14px;
    }

    .rfq-form-wrapper,
    .bom-form-wrapper,
    .sidebar-card {
        width: 100%;
        min-width: 0;
        padding: 20px;
        border-radius: 14px;
    }

    .rfq-layout,
    .bom-layout,
    .rfq-form,
    .bom-form,
    .form-row,
    .form-group {
        min-width: 0;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
        width: 100%;
        max-width: 100%;
    }

    .rfq-sidebar,
    .bom-sidebar {
        gap: 12px;
    }

    .sidebar-card {
        min-width: 100%;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
        min-height: 46px;
        font-size: 16px;
    }
}

@media (max-width: 380px) {
    .logo {
        font-size: 17px;
    }

    .navbar .lang-link {
        min-width: 24px;
        padding: 4px 3px;
        font-size: 9px;
    }

    .navbar .container {
        padding-left: 12px;
        padding-right: 12px;
    }
}