/* ============================================================
 * 腾飞ERP · 全站样式表
 * ------------------------------------------------------------
 * 配色方案：活力橙 + 深蓝
 *
 * 【如何改配色】
 * 只需修改下方 :root 里的 CSS 变量即可，全站颜色会自动同步。
 * ============================================================ */

:root {
    /* ---------- 主色（活力橙） ---------- */
    --primary:        #f97316;
    --primary-dark:   #ea580c;
    --primary-light:  #ffedd5;
    --primary-border: #fed7aa;
    --primary-soft:   #fff7ed;
    --primary-text:   #c2410c;

    /* ---------- 辅助色（深蓝） ---------- */
    --accent:         #1e3a8a;
    --accent-dark:    #1e40af;
    --accent-light:   #dbeafe;
    --accent-border:  #bfdbfe;
    --accent-text:    #1e40af;

    /* ---------- 文字 ---------- */
    --text-primary:   #0f172a;
    --text-secondary: #334155;
    --text-muted:     #64748b;
    --text-light:     #94a3b8;

    /* ---------- 背景 ---------- */
    --bg-page:        #f8fafc;
    --bg-card:        #ffffff;
    --bg-soft:        #f1f5f9;
    --bg-hero:        linear-gradient(135deg, #7c2d12 0%, #ea580c 50%, #fb923c 100%);

    /* ---------- 边框 ---------- */
    --border:         #e9eef3;
    --border-soft:    #eef2f6;

    /* ---------- 阴影 ---------- */
    --shadow-sm:      0 4px 12px rgba(0,0,0,0.02);
    --shadow-md:      0 8px 24px -6px rgba(0,0,0,0.15);
    --shadow-lg:      0 16px 36px -18px rgba(0,0,0,0.07);

    /* ---------- 圆角 ---------- */
    --radius-sm:      6px;
    --radius-md:      10px;
    --radius-lg:      14px;
    --radius-xl:      20px;
    --radius-2xl:     24px;
}

/* ============================================================
   全局样式
   ============================================================ */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    background-color: var(--bg-page);
    color: var(--text-secondary);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ============================================================
   Hero 首屏区
   ============================================================ */
.hero {
    background: var(--bg-hero);
    color: #ffffff;
    padding: 64px 0 72px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255,255,255,0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -5%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 70%);
    border-radius: 50%;
}

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

.hero-badge {
    display: inline-block;
    background: rgba(255,255,255,0.15);
    color: #ffffff;
    font-size: 13px;
    font-weight: 600;
    padding: 6px 16px;
    border-radius: 40px;
    margin-bottom: 20px;
    letter-spacing: 0.3px;
    border: 1px solid rgba(255,255,255,0.2);
    backdrop-filter: blur(4px);
}

.hero h1 {
    font-size: 42px;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.5px;
    margin-bottom: 18px;
    max-width: 800px;
}

.hero-subtitle {
    font-size: 18px;
    color: rgba(255,255,255,0.85);
    margin-bottom: 24px;
    max-width: 700px;
    line-height: 1.6;
}

.hero-points {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 32px;
}

.hero-points li {
    font-size: 15px;
    color: rgba(255,255,255,0.9);
    font-weight: 500;
}

.hero-cta {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

.hero-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    border: none;
    text-decoration: none;
    white-space: nowrap;
}

.hero-btn-primary {
    background: #ffffff;
    color: var(--primary);
    box-shadow: 0 8px 24px -6px rgba(0,0,0,0.3);
}

.hero-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 30px -6px rgba(0,0,0,0.4);
}

.hero-btn-secondary {
    background: rgba(255,255,255,0.12);
    color: #ffffff;
    border: 1.5px solid rgba(255,255,255,0.3);
    backdrop-filter: blur(4px);
}

.hero-btn-secondary:hover {
    background: rgba(255,255,255,0.2);
    transform: translateY(-2px);
}

.hero-scroll-hint {
    text-align: center;
    margin-top: 40px;
    color: rgba(255,255,255,0.6);
    font-size: 13px;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(6px); }
}

/* ============================================================
   行业选项卡
   ============================================================ */
.industry-tabs {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 16px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0,0,0,0.02);
}

.industry-tabs .container {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
    justify-content: flex-start;
}

.industry-tab {
    padding: 10px 22px;
    font-weight: 600;
    font-size: 15px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1.5px solid #e2e8f0;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 8px;
    letter-spacing: 0.2px;
    white-space: nowrap;
    line-height: 1.2;
}

.industry-tab:hover {
    color: var(--primary);
    background: var(--primary-soft);
    border-color: var(--primary-border);
    transform: translateY(-1px);
}

.industry-tab.active {
    color: #ffffff;
    background: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 4px 12px -4px rgba(249, 115, 22, 0.4);
}

.industry-tab .tab-icon { display: none; }
.industry-tab .tab-name { font-size: 15px; font-weight: 700; }

/* AI 亮点选项卡（深蓝渐变） */
.industry-tab.tab-ai {
    border-color: var(--accent-border);
    background: linear-gradient(135deg, #eff6ff 0%, #dbeafe 100%);
    color: var(--accent-text);
}

.industry-tab.tab-ai:hover {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    border-color: var(--accent);
    color: var(--accent-dark);
}

.industry-tab.tab-ai.active {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    border-color: var(--accent-dark);
    color: #ffffff;
    box-shadow: 0 4px 14px -4px rgba(30, 58, 138, 0.5);
}

/* ============================================================
   主体产品区
   ============================================================ */
.product-section {
    padding: 28px 0 32px;
    background: var(--bg-card);
}

.overview-header { margin-bottom: 20px; }

.overview-header h2 {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.3px;
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 10px;
}

.overview-header h2 .ai-chip {
    background: var(--primary-light);
    color: var(--primary);
    font-size: 13px;
    font-weight: 700;
    padding: 3px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--primary-border);
}

.overview-desc {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 900px;
    line-height: 1.7;
}

/* ============================================================
   功能卡片网格（全部显示，每行 4 个）
   ============================================================ */
.card-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 24px;
}

.showcase-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    padding: 22px 20px;
    border: 1px solid var(--border);
    border-top: 3px solid var(--border);
    box-shadow: var(--shadow-sm);
    transition: box-shadow 0.2s, border-color 0.2s, transform 0.2s;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.showcase-card:hover {
    border-color: var(--primary);
    border-top-color: var(--primary);
    box-shadow: 0 14px 24px -10px rgba(249, 115, 22, 0.15);
    transform: translateY(-3px);
}

.showcase-card h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.showcase-card p {
    color: var(--text-muted);
    font-size: 15px;
    line-height: 1.55;
    flex: 1;
}

.showcase-card .mini-tag {
    background: var(--primary-light);
    color: var(--primary);
    font-size: 12px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    align-self: flex-start;
    margin-top: 4px;
    border: 1px solid var(--primary-border);
}

/* ============================================================
   信任背书区
   ============================================================ */
.trust-section {
    background: var(--bg-page);
    padding: 48px 0;
    border-top: 1px solid var(--border);
}

.trust-header {
    text-align: center;
    margin-bottom: 32px;
}

.trust-header h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.trust-header p {
    color: var(--text-muted);
    font-size: 15px;
}

.clients-wall {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px;
    margin-bottom: 40px;
}

.client-logo {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px 28px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-muted);
    transition: all 0.2s;
}

.client-logo:hover {
    border-color: var(--primary-border);
    color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 8px 16px -8px rgba(249, 115, 22, 0.2);
}

.testimonials {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.testimonial {
    background: var(--bg-card);
    border-radius: 16px;
    padding: 24px 22px;
    border: 1px solid var(--border);
    border-left: 4px solid var(--primary);
    position: relative;
}

.testimonial::before {
    content: '"';
    position: absolute;
    top: 8px;
    right: 20px;
    font-size: 60px;
    color: var(--primary-light);
    line-height: 1;
    font-family: Georgia, serif;
}

.testimonial-quote {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.65;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.testimonial-author {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.testimonial-name {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
}

.testimonial-role {
    font-size: 12px;
    color: var(--text-light);
}

/* ============================================================
   关于腾飞
   ============================================================ */
.intro-section {
    padding: 48px 0 56px;
    background: var(--bg-card);
    border-top: 1px solid var(--border);
}

.intro-card {
    background: var(--bg-page);
    border-radius: var(--radius-2xl);
    padding: 40px 44px;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-soft);
    display: flex;
    flex-wrap: wrap;
    gap: 36px;
    align-items: center;
}

.intro-text { flex: 2; min-width: 300px; }

.intro-text .badge {
    display: inline-block;
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 700;
    font-size: 14px;
    padding: 4px 16px;
    border-radius: var(--radius-sm);
    margin-bottom: 18px;
    border: 1px solid var(--primary-border);
}

.intro-text h2 {
    font-size: 30px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.3;
    margin-bottom: 18px;
    letter-spacing: -0.4px;
}

.intro-text p {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 18px;
    max-width: 720px;
}

.intro-text .highlight-list {
    list-style: none;
    margin: 18px 0 4px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.intro-text .highlight-list li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 15px;
    color: var(--text-primary);
    line-height: 1.55;
}

.intro-text .highlight-list li::before {
    content: "✓";
    color: #ffffff;
    font-weight: 900;
    font-size: 14px;
    line-height: 1;
    flex-shrink: 0;
    background: var(--primary);
    width: 22px;
    height: 22px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
}

.intro-stats {
    flex: 1;
    min-width: 220px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
    background: var(--bg-card);
    border-radius: 18px;
    padding: 26px 28px;
    border: 1px solid var(--border);
}

.stat-item { display: flex; flex-direction: column; gap: 4px; }

.stat-number {
    font-size: 26px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.1;
}

.stat-label {
    font-size: 14px;
    color: var(--text-muted);
    font-weight: 500;
}

/* ============================================================
   右下角悬浮操作区
   ============================================================ */
.floating-actions {
    position: fixed;
    right: 24px;
    bottom: 100px;
    z-index: 200;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 12px;
}

.fab {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 18px;
    border-radius: 999px;
    background: var(--bg-card);
    border: 1px solid #e2e8f0;
    box-shadow: var(--shadow-md);
    cursor: pointer;
    font-weight: 700;
    font-size: 15px;
    color: var(--text-primary);
    transition: all 0.2s;
    white-space: nowrap;
}

.fab:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 30px -8px rgba(0,0,0,0.2);
}

.fab .fab-icon { font-size: 20px; line-height: 1; }

.fab-platforms {
    background: var(--bg-card);
    border-color: var(--primary-border);
    color: var(--primary);
}

.fab-platforms:hover { background: var(--primary-soft); }

.fab-demo {
    background: var(--primary);
    border-color: var(--primary);
    color: #ffffff;
    box-shadow: 0 8px 24px -4px rgba(249, 115, 22, 0.5);
}

.fab-demo:hover { background: var(--primary-dark); border-color: var(--primary-dark); }

/* 多平台二维码面板 */
.platform-panel {
    position: absolute;
    right: 100%;
    bottom: 0;
    margin-right: 12px;
    width: 320px;
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    box-shadow: 0 24px 48px -12px rgba(0,0,0,0.25);
    border: 1px solid var(--border);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    opacity: 0;
    visibility: hidden;
    transform: translateX(8px);
    transition: all 0.25s;
    pointer-events: none;
}

/* 只保留点击展开（.pinned 类），去掉 hover 触发 */
.floating-actions .fab-wrap.pinned .platform-panel {
    opacity: 1;
    visibility: visible;
    transform: translateX(0);
    pointer-events: auto;
}

.platform-panel-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-soft);
}

.platform-panel-title .hint {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-light);
}

.platform-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

.platform-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 12px;
    border-radius: var(--radius-md);
    border: 1.5px solid var(--border);
    background: var(--bg-page);
    cursor: pointer;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    transition: all 0.15s;
    text-align: left;
}

.platform-btn:hover {
    border-color: var(--primary-border);
    background: var(--primary-soft);
    color: var(--primary);
}

.platform-btn.active {
    border-color: var(--primary);
    background: var(--primary-soft);
    color: var(--primary);
}

.platform-btn .platform-icon { font-size: 18px; }
.platform-btn .platform-name { font-size: 13px; font-weight: 700; }

.qr-preview {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding-top: 4px;
}

.qr-preview-box {
    width: 180px;
    height: 180px;
    border-radius: 16px;
    background: var(--bg-page);
    border: 2px dashed var(--primary-border);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 64px;
    color: var(--primary);
}

.qr-preview-caption {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
}

.qr-preview-sub {
    font-size: 12px;
    color: var(--text-muted);
    text-align: center;
    margin-top: -6px;
}

/* ============================================================
   页脚
   ============================================================ */
.footer {
    background: var(--bg-card);
    padding: 32px 0 24px;
    border-top: 1px solid #e2e8f0;
    text-align: center;
    color: var(--text-light);
    font-size: 13px;
}

/* ============================================================
   弹窗
   ============================================================ */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.2s, visibility 0.2s;
    padding: 20px;
}

.modal-overlay.open { opacity: 1; visibility: visible; }

.modal-box {
    background: #ffffff;
    border-radius: var(--radius-xl);
    max-width: 460px;
    width: 100%;
    padding: 32px 28px 28px;
    box-shadow: 0 40px 70px -20px rgba(0,0,0,0.4);
    transform: scale(0.96);
    transition: transform 0.2s;
    position: relative;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-overlay.open .modal-box { transform: scale(1); }

.modal-close {
    position: absolute;
    top: 18px;
    right: 22px;
    font-size: 26px;
    line-height: 1;
    color: var(--text-light);
    cursor: pointer;
    background: none;
    border: none;
}

.modal-close:hover { color: var(--text-primary); }

.modal-box h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.modal-box .subhead {
    color: var(--text-muted);
    font-size: 14px;
    margin-bottom: 24px;
    border-left: 3px solid var(--primary);
    padding: 8px 14px;
    background: var(--bg-page);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.form-group { margin-bottom: 16px; }

.form-group label {
    display: block;
    font-weight: 600;
    font-size: 14px;
    color: var(--text-primary);
    margin-bottom: 5px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 11px 16px;
    border-radius: var(--radius-md);
    border: 1.5px solid #e2e8f0;
    font-size: 14px;
    font-family: inherit;
    background: #ffffff;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.1);
}

.form-group textarea { min-height: 80px; resize: vertical; }

.modal-actions { display: flex; gap: 10px; margin-top: 24px; flex-wrap: wrap; }

.btn-save {
    flex: 1;
    background: var(--primary);
    color: white;
    border: none;
    padding: 13px 22px;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 15px;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-save:hover { background: var(--primary-dark); }
.btn-save:disabled { opacity: 0.7; cursor: not-allowed; }

.btn-cancel {
    background: var(--bg-soft);
    border: none;
    padding: 13px 22px;
    border-radius: var(--radius-md);
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 15px;
}

.btn-cancel:hover { background: #e2e8f0; }

.form-message {
    margin-top: 14px;
    font-size: 14px;
    padding: 11px 16px;
    border-radius: var(--radius-md);
    display: none;
}

.form-message.success { background: var(--primary-light); color: var(--primary-text); display: block; }
.form-message.error { background: #fee9e7; color: #b91c1c; display: block; }

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 1180px) {
    .card-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 900px) {
    .hero { padding: 48px 0 56px; }
    .hero h1 { font-size: 32px; }
    .hero-subtitle { font-size: 16px; }
    .hero-points li { font-size: 14px; }

    .intro-card { padding: 28px 24px; flex-direction: column; align-items: flex-start; gap: 24px; }
    .intro-text h2 { font-size: 24px; }
    .intro-stats { width: 100%; grid-template-columns: 1fr 1fr; }
    .overview-header h2 { font-size: 22px; }
    .industry-tabs .container { justify-content: center; }
    .industry-tab { padding: 9px 18px; font-size: 14px; }
    .card-grid { grid-template-columns: repeat(2, 1fr); }

    .trust-section { padding: 36px 0; }
    .trust-header h2 { font-size: 20px; }
}

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

    .floating-actions { right: 14px; bottom: 80px; gap: 10px; }
    .fab { padding: 14px; border-radius: 50%; font-size: 14px; }
    .fab .fab-icon { font-size: 18px; }
    .fab .fab-label { display: none; }

    .platform-panel {
        position: fixed;
        right: 14px;
        bottom: 160px;
        left: 14px;
        width: auto;
        margin-right: 0;
        max-width: 360px;
        margin-left: auto;
        transform: translateY(8px);
    }

    .floating-actions .fab-wrap:hover .platform-panel {
        opacity: 0;
        visibility: hidden;
    }
    .floating-actions .fab-wrap.pinned .platform-panel {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .qr-preview-box { width: 150px; height: 150px; font-size: 54px; }
}

@media (max-width: 600px) {
    .hero { padding: 36px 0 44px; }
    .hero h1 { font-size: 26px; }
    .hero-subtitle { font-size: 15px; }
    .hero-btn { padding: 12px 22px; font-size: 14px; }
    .hero-btn-secondary { display: none; }

    .intro-card { padding: 22px 16px; border-radius: 16px; }
    .intro-text h2 { font-size: 22px; }
    .industry-tabs { padding: 12px 0; }
    .industry-tabs .container { gap: 8px; justify-content: center; }
    .industry-tab { padding: 8px 14px; font-size: 13px; }
    .industry-tab .tab-name { font-size: 13px; }
    .overview-header h2 { font-size: 20px; }
    .overview-desc { font-size: 15px; }
    .card-grid { grid-template-columns: 1fr; gap: 14px; }
    .showcase-card { padding: 18px 16px; }
    .showcase-card h4 { font-size: 16px; }
    .showcase-card p { font-size: 14px; }

    .clients-wall { gap: 10px; }
    .client-logo { padding: 12px 18px; font-size: 13px; }
    .testimonial { padding: 20px 18px; }
}

@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .industry-tab { padding: 7px 12px; font-size: 12px; }
    .industry-tab .tab-name { font-size: 12px; }
    .hero h1 { font-size: 22px; }
    .intro-text h2 { font-size: 20px; }
    .stat-number { font-size: 22px; }

    .platform-panel { padding: 16px; }
    .qr-preview-box { width: 130px; height: 130px; font-size: 46px; }
    .platform-btn { padding: 8px 10px; }
}
/* ============================================================
   顶部导航
   ============================================================ */
.top-nav {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}
.top-nav .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.nav-logo {
    font-size: 20px;
    font-weight: 800;
    color: var(--primary);
    text-decoration: none;
}
.nav-menu {
    display: flex;
    list-style: none;
    gap: 16px;
    flex-wrap: wrap;
}
.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 600;
    padding: 6px 10px;
    border-radius: 6px;
    transition: all 0.15s;
}
.nav-menu a:hover,
.nav-menu a.active {
    color: var(--primary);
    background: var(--primary-soft);
}

/* 页脚地址 */
.footer-address {
    margin-top: 6px;
    font-size: 12px;
    color: #b0b8c4;
    letter-spacing: 0.2px;
}

/* 二维码下方电话 */
.qr-phone {
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid var(--border-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-muted);
    width: 100%;
}
.qr-phone-icon { font-size: 14px; }
.qr-phone-label { font-weight: 500; }
.qr-phone-number {
    color: var(--primary);
    font-weight: 700;
    text-decoration: none;
    font-size: 14px;
    letter-spacing: 0.3px;
    transition: color 0.15s;
}
.qr-phone-number:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* ============================================================
   首页行业卡片
   ============================================================ */
.industry-cards {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
}
.industry-card {
    display: block;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    text-decoration: none;
    color: inherit;
    transition: all 0.2s;
    border-top: 3px solid var(--primary);
}
.industry-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 14px 30px -10px rgba(249, 115, 22, 0.2);
    border-color: var(--primary);
}
.industry-card-icon { font-size: 40px; margin-bottom: 12px; }
.industry-card h3 {
    font-size: 20px;
    color: var(--text-primary);
    margin-bottom: 10px;
}
.industry-card p {
    color: var(--text-muted);
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 12px;
}
.industry-card-more {
    color: var(--primary);
    font-weight: 700;
    font-size: 14px;
}

/* ============================================================
   页面底部 CTA
   ============================================================ */
.page-cta {
    margin-top: 48px;
    padding: 36px 32px;
    background: var(--bg-page);
    border-radius: var(--radius-2xl);
    text-align: center;
}
.page-cta h3 {
    font-size: 24px;
    color: var(--text-primary);
    margin-bottom: 8px;
}
.page-cta p {
    color: var(--text-muted);
    margin-bottom: 20px;
}
.btn-cta {
    background: var(--primary);
    color: white;
    border: none;
    padding: 14px 32px;
    border-radius: var(--radius-md);
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s;
}
.btn-cta:hover { background: var(--primary-dark); }

/* ============================================================
   联系我们页
   ============================================================ */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
    margin-top: 32px;
}
.contact-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}
.contact-item {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px;
    background: var(--bg-page);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}
.contact-icon {
    font-size: 28px;
    line-height: 1;
}
.contact-label {
    font-size: 13px;
    color: var(--text-muted);
    font-weight: 500;
    margin-bottom: 4px;
}
.contact-value {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    text-decoration: none;
}
a.contact-value:hover {
    color: var(--primary);
}
.contact-cta-card {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: white;
    border-radius: var(--radius-2xl);
    padding: 40px 36px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
}
.contact-cta-card h3 {
    font-size: 26px;
    margin-bottom: 12px;
}
.contact-cta-card p {
    color: rgba(255,255,255,0.9);
    margin-bottom: 24px;
    line-height: 1.6;
}
.contact-cta-card .btn-cta {
    background: #ffffff;
    color: var(--primary);
}
.contact-cta-card .btn-cta:hover {
    background: #f8fafc;
}

/* ============================================================
   响应式
   ============================================================ */
@media (max-width: 900px) {
    .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    .nav-menu { display: none; }
    .industry-cards { grid-template-columns: 1fr; }
}

.footer-icp {
    margin-top: 6px;
    font-size: 12px;
    color: #b0b8c4;
}

.footer-icp a {
    color: #b0b8c4;
    text-decoration: none;
    transition: color 0.15s;
}

.footer-icp a:hover {
    color: var(--primary);
    text-decoration: underline;
}