/* ========================================
   WPS 365 高端制造解决方案 - 专题页样式
   参照 special-chip 设计风格
   ======================================== */

/* 变量定义 */
:root {
    --primary: #1a73e8;
    --primary-dark: #1557b0;
    --primary-light: #e8f0fe;
    --accent: #00c853;
    --dark: #1a1a2e;
    --dark-card: #252542;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-500: #adb5bd;
    --gray-700: #495057;
    --gradient-primary: linear-gradient(135deg, #1a73e8 0%, #6c5ce7 100%);
    --gradient-hero: linear-gradient(135deg, #0d1b3e 0%, #1a3a6e 40%, #1a73e8 100%);
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 20px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 40px rgba(0,0,0,0.16);
    --radius: 12px;
    --radius-lg: 20px;
}

/* 全局样式 */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: #333;
    overflow-x: hidden;
}

/* 滚动条 */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: #f1f1f1; }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }

/* ========= 导航栏 ========= */
.navbar {
    padding: 12px 0;
    transition: all 0.3s ease;
    background: transparent;
}
.navbar.scrolled {
    background: rgba(26, 26, 46, 0.95) !important;
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0,0,0,0.2);
    padding: 8px 0;
}
.brand-icon {
    display: inline-flex; align-items: center; justify-content: center;
    width: 32px; height: 32px; background: var(--primary);
    color: #fff; border-radius: 8px; font-weight: 700; font-size: 16px; margin-right: 6px;
}
.brand-icon-sm { width: 24px; height: 24px; font-size: 12px; border-radius: 6px; }
.nav-link {
    font-size: 14px; font-weight: 500; padding: 8px 16px !important;
    transition: color 0.3s;
}
.nav-link:hover, .nav-link.active { color: #fff !important; }
.nav-cta { border-radius: 20px !important; font-weight: 600; font-size: 13px !important; }

/* ========= Hero ========= */
.hero-section {
    background: var(--gradient-hero);
    position: relative; overflow: hidden; min-height: 100vh;
}
.hero-particles { position: absolute; inset: 0; overflow: hidden; }
.particle {
    position: absolute; width: 4px; height: 4px;
    background: rgba(255,255,255,0.3); border-radius: 50%;
    animation: float-particle linear infinite;
}
@keyframes float-particle {
    0% { transform: translateY(100vh) scale(0); opacity: 0; }
    10% { opacity: 1; } 90% { opacity: 1; }
    100% { transform: translateY(-10vh) scale(1); opacity: 0; }
}
.hero-badge {
    display: inline-block; padding: 6px 18px;
    background: rgba(255,255,255,0.15); border: 1px solid rgba(255,255,255,0.25);
    border-radius: 30px; color: #fff; font-size: 14px; font-weight: 500;
    margin-bottom: 24px; backdrop-filter: blur(5px);
}
.hero-title {
    color: #fff; font-size: 3.5rem; font-weight: 900; line-height: 1.2; margin-bottom: 20px;
}
.text-gradient {
    background: linear-gradient(135deg, #64b5f6, #00e5ff);
    -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero-desc {
    color: rgba(255,255,255,0.8); font-size: 1.1rem; line-height: 1.8;
    margin-bottom: 32px; max-width: 560px;
}
.hero-actions .btn-primary {
    background: var(--primary); border: none; border-radius: 30px;
    padding: 12px 32px; font-weight: 600;
    box-shadow: 0 4px 20px rgba(26,115,232,0.4); transition: all 0.3s;
}
.hero-actions .btn-primary:hover {
    transform: translateY(-2px); box-shadow: 0 6px 30px rgba(26,115,232,0.6);
}
.hero-actions .btn-outline-light {
    border-radius: 30px; padding: 12px 32px; font-weight: 600; border-width: 2px;
}
.hero-stats { display: flex; gap: 48px; margin-top: 48px; }
.stat-item { text-align: center; }
.stat-num { color: #fff; font-size: 2.5rem; font-weight: 900; }
.stat-label { color: rgba(255,255,255,0.6); font-size: 13px; margin-top: 4px; }

/* Hero Visual */
.hero-visual { position: relative; width: 400px; height: 400px; margin: 0 auto; }
.center-logo {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    width: 120px; height: 120px; background: var(--gradient-primary);
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    color: #fff; font-weight: 700; font-size: 1.2rem; z-index: 2;
    box-shadow: 0 0 40px rgba(26,115,232,0.5);
}
.logo-ring {
    position: absolute; inset: -20px;
    border: 2px solid rgba(26,115,232,0.3); border-radius: 50%;
    animation: pulse-ring 2s ease-in-out infinite;
}
@keyframes pulse-ring {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.1); opacity: 1; }
}
.floating-card {
    position: absolute; background: rgba(255,255,255,0.12);
    backdrop-filter: blur(10px); border: 1px solid rgba(255,255,255,0.2);
    border-radius: var(--radius); padding: 14px 20px; color: #fff;
    display: flex; align-items: center; gap: 10px;
    font-size: 14px; font-weight: 500; white-space: nowrap;
}
.floating-card i { font-size: 20px; }
.card-1 { top: 30px; left: 50%; animation: float-card1 6s ease-in-out infinite; }
.card-2 { top: 50%; right: 0; animation: float-card2 6s ease-in-out 1.5s infinite backwards; }
.card-3 { bottom: 30px; left: 50%; animation: float-card3 6s ease-in-out 3s infinite backwards; }
.card-4 { top: 50%; left: 0; animation: float-card4 6s ease-in-out 4.5s infinite backwards; }
@keyframes float-card1 {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(-14px); }
}
@keyframes float-card2 {
    0%, 100% { transform: translateY(-50%) translateX(0); }
    50% { transform: translateY(-50%) translateX(-10px); }
}
@keyframes float-card3 {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(14px); }
}
@keyframes float-card4 {
    0%, 100% { transform: translateY(-50%) translateX(0); }
    50% { transform: translateY(-50%) translateX(10px); }
}
.hero-wave { position: absolute; bottom: -1px; left: 0; right: 0; line-height: 0; }
.hero-wave svg { width: 100%; height: 120px; }

/* ========= 通用 Section ========= */
.section-padding { padding: 100px 0; }
.section-header { margin-bottom: 60px; }
.section-tag {
    display: inline-block; padding: 4px 16px;
    background: var(--primary-light); color: var(--primary);
    border-radius: 20px; font-size: 13px; font-weight: 700;
    letter-spacing: 1px; margin-bottom: 16px;
}
.section-tag-light {
    background: rgba(255,255,255,0.1); color: rgba(255,255,255,0.8);
}
.section-title { font-size: 2.2rem; font-weight: 800; margin-bottom: 12px; }
.section-subtitle { font-size: 1.05rem; color: var(--gray-700); }

/* ========= 挑战卡片 ========= */
.challenge-card {
    background: #fff; border-radius: var(--radius-lg); padding: 36px;
    box-shadow: var(--shadow-sm); border-left: 5px solid;
    transition: all 0.3s; height: 100%;
}
.challenge-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.challenge-red { border-color: #e74c3c; }
.challenge-orange { border-color: #f39c12; }
.challenge-icon {
    width: 56px; height: 56px; border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    margin-bottom: 20px; font-size: 24px;
}
.challenge-red .challenge-icon { background: #fdeaea; color: #e74c3c; }
.challenge-orange .challenge-icon { background: #fef3e2; color: #f39c12; }
.challenge-card h4 { font-size: 1.2rem; font-weight: 700; margin-bottom: 12px; }
.challenge-card p { color: var(--gray-700); font-size: 14px; line-height: 1.8; margin: 0; }

/* ========= 问题卡片 ========= */
.problems-header h3 { font-size: 1.4rem; font-weight: 700; }
.problem-card {
    background: #fff; border-radius: var(--radius-lg); padding: 36px;
    box-shadow: var(--shadow-sm); height: 100%; transition: all 0.3s;
    position: relative; overflow: hidden;
}
.problem-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.problem-number {
    position: absolute; top: -10px; right: 16px;
    font-size: 5rem; font-weight: 900; color: rgba(26,115,232,0.06); line-height: 1;
}
.problem-icon {
    width: 52px; height: 52px; background: var(--primary-light);
    color: var(--primary); border-radius: 14px;
    display: flex; align-items: center; justify-content: center;
    font-size: 22px; margin-bottom: 20px;
}
.problem-card h5 { font-weight: 700; margin-bottom: 20px; }
.problem-compare { display: flex; flex-direction: column; gap: 12px; }
.compare-item { padding: 12px 16px; border-radius: 10px; font-size: 13px; line-height: 1.6; }
.compare-item p { margin: 0; }
.compare-label {
    display: inline-block; font-size: 11px; font-weight: 700;
    padding: 2px 8px; border-radius: 4px; margin-bottom: 6px;
}
.compare-old { background: #fff3f3; }
.compare-old .compare-label { background: #e74c3c; color: #fff; }
.compare-new { background: #e8f5e9; }
.compare-new .compare-label { background: #00c853; color: #fff; }

/* ========= 解决方案卡片 ========= */
.solution-card {
    background: #fff; border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm); overflow: hidden; height: 100%; transition: all 0.3s;
}
.solution-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.solution-header { padding: 30px; color: #fff; text-align: center; }
.solution-blue { background: linear-gradient(135deg, #1a73e8, #4285f4); }
.solution-green { background: linear-gradient(135deg, #00897b, #26a69a); }
.solution-purple { background: linear-gradient(135deg, #6c5ce7, #a29bfe); }
.solution-icon {
    width: 64px; height: 64px; background: rgba(255,255,255,0.2);
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    font-size: 28px; margin: 0 auto 16px;
}
.solution-header h4 { font-weight: 700; margin-bottom: 4px; }
.solution-subtitle { opacity: 0.9; font-size: 14px; margin: 0; }
.solution-body { padding: 28px; }
.solution-list { list-style: none; padding: 0; margin: 0 0 20px; }
.solution-list li {
    display: flex; gap: 12px; margin-bottom: 18px; align-items: flex-start;
}
.solution-list li:last-child { margin-bottom: 0; }
.solution-list li > i { color: var(--primary); font-size: 18px; flex-shrink: 0; margin-top: 2px; }
.solution-list strong { display: block; font-size: 14px; margin-bottom: 4px; }
.solution-list p { font-size: 13px; color: var(--gray-700); margin: 0; line-height: 1.6; }
.solution-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.solution-tags .tag {
    padding: 4px 12px; background: var(--primary-light);
    color: var(--primary); border-radius: 20px; font-size: 12px; font-weight: 600;
}

/* ========= 架构图 ========= */
.architecture-box {
    background: #fff; border-radius: var(--radius-lg);
    padding: 40px; box-shadow: var(--shadow-sm);
}
.arch-layer { padding: 20px 24px; border-radius: var(--radius); margin-bottom: 12px; }
.arch-layer:last-child { margin-bottom: 0; }
.arch-top { background: linear-gradient(135deg, #e3f2fd, #bbdefb); }
.arch-middle { background: linear-gradient(135deg, #e8f5e9, #c8e6c9); }
.arch-base { background: linear-gradient(135deg, #f3e5f5, #e1bee7); }
.arch-label {
    font-size: 12px; font-weight: 700; color: var(--gray-700);
    margin-bottom: 10px; text-transform: uppercase; letter-spacing: 1px;
}
.arch-items { display: flex; flex-wrap: wrap; gap: 8px; }
.arch-items span {
    padding: 6px 14px; background: rgba(255,255,255,0.8);
    border-radius: 8px; font-size: 13px; font-weight: 500;
}

/* ========= 应用矩阵 ========= */
.app-matrix {
    background: #fff; border-radius: var(--radius-lg);
    padding: 40px; box-shadow: var(--shadow-sm);
}
.app-item {
    text-align: center; padding: 24px 16px; border-radius: var(--radius);
    transition: all 0.3s; cursor: default;
}
.app-item:hover { background: var(--primary-light); transform: translateY(-4px); }
.app-item i { font-size: 32px; color: var(--primary); display: block; margin-bottom: 10px; }
.app-item span { font-size: 14px; font-weight: 600; }

/* ========= 实施路径 ========= */
.impl-card {
    background: var(--dark-card); border-radius: var(--radius-lg);
    padding: 36px; height: 100%; border: 1px solid rgba(255,255,255,0.08);
}
.impl-badge {
    display: inline-block; padding: 4px 14px; background: var(--primary);
    color: #fff; border-radius: 20px; font-size: 12px; font-weight: 700; margin-bottom: 16px;
}
.impl-card h4 { font-weight: 700; margin-bottom: 8px; }
.impl-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin: 20px 0; }
.impl-module {
    background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius); padding: 16px; text-align: center; transition: all 0.3s;
}
.impl-module:hover { background: rgba(26,115,232,0.2); border-color: var(--primary); }
.impl-module i { font-size: 24px; color: var(--primary); display: block; margin-bottom: 8px; }
.impl-module span { font-size: 13px; font-weight: 500; }
.impl-deploy { display: flex; gap: 8px; flex-wrap: wrap; }
.impl-deploy span {
    padding: 6px 16px; background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.15); border-radius: 20px;
    font-size: 12px; color: rgba(255,255,255,0.7);
}
.impl-features { margin-top: 20px; }
.impl-feature { margin-bottom: 20px; }
.impl-feature:last-child { margin-bottom: 0; }
.impl-feature h6 { color: var(--primary); font-weight: 600; margin-bottom: 8px; font-size: 14px; }
.impl-feature ul { list-style: none; padding: 0; margin: 0; }
.impl-feature ul li {
    font-size: 13px; color: rgba(255,255,255,0.6); padding: 3px 0;
    padding-left: 16px; position: relative;
}
.impl-feature ul li::before {
    content: ''; position: absolute; left: 0; top: 10px;
    width: 6px; height: 6px; background: var(--primary); border-radius: 50%;
}

/* ========= 时间线 ========= */
.timeline {
    position: relative; display: flex; justify-content: space-between; gap: 24px;
}
.timeline::before {
    content: ''; position: absolute; top: 32px; left: 80px; right: 80px;
    height: 3px; background: rgba(255,255,255,0.1);
}
.timeline-item { flex: 1; text-align: center; }
.timeline-marker {
    width: 64px; height: 64px; background: var(--gradient-primary);
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    margin: 0 auto 20px; position: relative; z-index: 1;
    box-shadow: 0 4px 20px rgba(26,115,232,0.4);
}
.timeline-marker span { font-size: 1.5rem; font-weight: 900; color: #fff; }
.timeline-content h5 { font-weight: 700; margin-bottom: 16px; font-size: 1rem; }
.timeline-details {
    background: var(--dark-card); border-radius: var(--radius);
    padding: 20px; text-align: left; border: 1px solid rgba(255,255,255,0.08);
}
.tl-row { display: flex; gap: 10px; font-size: 13px; margin-bottom: 8px; color: rgba(255,255,255,0.6); }
.tl-row:last-child { margin-bottom: 0; }
.tl-label {
    background: rgba(26,115,232,0.2); color: var(--primary);
    padding: 2px 10px; border-radius: 4px; font-size: 11px;
    font-weight: 600; flex-shrink: 0; line-height: 22px;
}

/* ========= 交付保障 ========= */
.guarantee-card {
    background: #fff; border-radius: var(--radius-lg);
    padding: 32px; box-shadow: var(--shadow-sm); height: 100%;
}
.guarantee-card h5 { font-weight: 700; margin-bottom: 24px; color: var(--primary); }
.team-roles { display: flex; flex-direction: column; gap: 16px; }
.role-item { display: flex; gap: 14px; align-items: flex-start; }
.role-icon {
    width: 42px; height: 42px; background: var(--primary-light);
    color: var(--primary); border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-size: 18px; flex-shrink: 0;
}
.role-item strong { font-size: 14px; display: block; margin-bottom: 2px; }
.role-item p { font-size: 13px; color: var(--gray-700); margin: 0; }
.mgmt-items { display: flex; flex-direction: column; gap: 16px; }
.mgmt-item { display: flex; gap: 14px; align-items: flex-start; }
.mgmt-item > i {
    width: 42px; height: 42px; background: #e8f5e9; color: #00897b;
    border-radius: 10px; display: flex; align-items: center; justify-content: center;
    font-size: 18px; flex-shrink: 0;
}
.mgmt-item strong { font-size: 14px; display: block; margin-bottom: 2px; }
.mgmt-item p { font-size: 13px; color: var(--gray-700); margin: 0; }

/* 售后保障 */
.after-sales {
    background: #fff; border-radius: var(--radius-lg);
    padding: 40px; box-shadow: var(--shadow-sm);
}
.as-item {
    text-align: center; padding: 24px 16px; border-radius: var(--radius); transition: all 0.3s;
}
.as-item:hover { background: var(--primary-light); transform: translateY(-4px); }
.as-item i { font-size: 32px; color: var(--primary); display: block; margin-bottom: 12px; }
.as-item h6 { font-size: 13px; font-weight: 600; margin: 0; }

/* ========= 客户案例 ========= */
.case-card {
    background: #fff; border-radius: var(--radius-lg); padding: 32px;
    box-shadow: var(--shadow-sm); height: 100%; transition: all 0.3s;
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.case-header {
    display: flex; align-items: center; gap: 16px; margin-bottom: 24px;
    padding-bottom: 20px; border-bottom: 1px solid var(--gray-200);
}
.case-logo {
    width: 56px; height: 56px; background: var(--gradient-primary);
    color: #fff; border-radius: 14px; display: flex; align-items: center;
    justify-content: center; font-weight: 900; font-size: 1.2rem; flex-shrink: 0;
}
.case-header h5 { font-weight: 700; margin-bottom: 4px; }
.case-industry { font-size: 13px; color: var(--gray-500); }
.case-info { margin-bottom: 20px; }
.info-row {
    display: flex; justify-content: space-between; padding: 8px 0;
    font-size: 13px; border-bottom: 1px dashed var(--gray-200);
}
.info-label { color: var(--gray-500); font-weight: 500; }
.case-problems { margin-bottom: 20px; }
.case-problems h6, .case-results h6 {
    font-size: 13px; font-weight: 700; color: var(--gray-700); margin-bottom: 10px;
}
.case-problems ul { list-style: none; padding: 0; margin: 0; }
.case-problems ul li {
    font-size: 13px; color: var(--gray-700); padding: 4px 0 4px 18px;
    position: relative; line-height: 1.6;
}
.case-problems ul li::before {
    content: ''; position: absolute; left: 0; top: 11px;
    width: 8px; height: 8px; border-radius: 50%; background: #e74c3c;
}
.result-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.result-tags span {
    padding: 4px 12px; background: #e8f5e9; color: #2e7d32;
    border-radius: 20px; font-size: 12px; font-weight: 600;
}

/* ========= 替代对照表 ========= */
.replace-section { background: var(--primary-light); }
.replace-section h3 { font-weight: 800; font-size: 1.5rem; }
.replace-table-wrapper {
    max-width: 700px; margin: 0 auto; background: #fff;
    border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm);
}
.replace-table { margin: 0; }
.replace-table thead th {
    background: var(--dark); color: #fff; font-weight: 700;
    font-size: 14px; text-align: center; padding: 16px; border: none;
}
.replace-table tbody td {
    text-align: center; padding: 14px 16px; font-size: 14px;
    font-weight: 500; vertical-align: middle; border-color: var(--gray-200);
}
.replace-table tbody tr:hover { background: var(--primary-light); }

/* ========= 留资入口 ========= */
.lead-section {
    background: var(--gradient-hero); padding: 100px 0;
    position: relative; overflow: hidden;
}
.lead-section::before {
    content: ''; position: absolute; inset: 0;
    background: radial-gradient(circle at 20% 50%, rgba(26,115,232,0.3), transparent 60%),
                radial-gradient(circle at 80% 80%, rgba(108,92,231,0.2), transparent 50%);
}
.lead-info { position: relative; z-index: 1; }
.lead-title {
    color: #fff; font-size: 2.2rem; font-weight: 900; line-height: 1.3; margin-bottom: 16px;
}
.lead-desc {
    color: rgba(255,255,255,0.75); font-size: 15px; line-height: 1.8; margin-bottom: 28px;
}
.lead-highlights { margin-bottom: 32px; }
.lead-highlight-item {
    display: flex; align-items: center; gap: 10px;
    color: rgba(255,255,255,0.9); font-size: 14px; margin-bottom: 12px;
}
.lead-highlight-item i { color: #00e676; font-size: 18px; flex-shrink: 0; }
.lead-contact-info { padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.15); }
.contact-row {
    display: flex; align-items: center; gap: 10px;
    color: rgba(255,255,255,0.8); font-size: 14px; margin-bottom: 10px;
}
.contact-row i { font-size: 16px; color: rgba(255,255,255,0.5); }

.lead-form-wrapper {
    position: relative; z-index: 1; background: #fff;
    border-radius: var(--radius-lg); padding: 40px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
.lead-form-header { margin-bottom: 24px; }
.lead-form-header h4 { font-weight: 800; margin-bottom: 4px; color: var(--dark); }
.lead-form-header p { color: var(--gray-700); font-size: 14px; margin: 0; }
.lead-form .form-label { font-size: 13px; font-weight: 600; color: var(--gray-700); margin-bottom: 4px; }
.lead-form .form-control, .lead-form .form-select {
    border-radius: 10px; padding: 10px 14px; font-size: 14px;
    border-color: var(--gray-200); transition: all 0.3s;
}
.lead-form .form-control:focus, .lead-form .form-select:focus {
    border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26,115,232,0.15);
}
.btn-submit {
    border-radius: 12px !important; padding: 14px !important;
    font-weight: 700; font-size: 16px !important;
    background: var(--gradient-primary) !important; border: none !important; transition: all 0.3s;
}
.btn-submit:hover {
    transform: translateY(-2px); box-shadow: 0 6px 24px rgba(26,115,232,0.4);
}
.btn-submit:active { transform: translateY(0); }
.btn-submit.submitting { pointer-events: none; opacity: 0.7; }

/* 提交成功 */
.lead-success { text-align: center; padding: 60px 20px; }
.success-icon { font-size: 64px; color: #00c853; margin-bottom: 20px; animation: success-bounce 0.6s ease; }
@keyframes success-bounce {
    0% { transform: scale(0); } 50% { transform: scale(1.2); } 100% { transform: scale(1); }
}
.lead-success h4 { font-weight: 800; margin-bottom: 10px; color: var(--dark); }
.lead-success p { color: var(--gray-700); font-size: 15px; }

/* ========= Footer ========= */
.site-footer {
    background: var(--dark); color: #fff; padding: 48px 0 24px;
}
.site-footer h6 { font-weight: 700; margin-bottom: 16px; font-size: 14px; }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: 8px; }
.footer-links a {
    color: var(--gray-500); text-decoration: none; font-size: 13px; transition: color 0.3s;
}
.footer-links a:hover { color: #fff; }
.social-links { display: flex; gap: 12px; }
.social-links a {
    width: 36px; height: 36px; background: rgba(255,255,255,0.1);
    border-radius: 50%; display: flex; align-items: center; justify-content: center;
    color: #fff; text-decoration: none; transition: all 0.3s; position: relative;
}
.social-links a:hover { background: var(--primary); }
.footer-phone { color: #fff; font-size: 1.25rem; font-weight: 700; margin-bottom: 6px; }
.wechat-trigger .wechat-qrcode {
    display: none; position: absolute; bottom: 100%; left: 50%; transform: translateX(-50%);
    width: 140px; height: auto; border-radius: 8px; box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    margin-bottom: 10px; background: #fff; padding: 4px;
}
.wechat-trigger:hover .wechat-qrcode { display: block; }

/* 提交按钮旋转图标 */
.spin-icon { display: inline-block; animation: spin 1s linear infinite; }
@keyframes spin { 0% { transform: rotate(0deg); } 100% { transform: rotate(360deg); } }

/* ========= 回到顶部 ========= */
.back-to-top {
    position: fixed; bottom: 30px; right: 30px; width: 44px; height: 44px;
    background: var(--primary); color: #fff; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    text-decoration: none; opacity: 0; visibility: hidden;
    transition: all 0.3s; box-shadow: var(--shadow-md); z-index: 999;
}
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background: var(--primary-dark); color: #fff; transform: translateY(-3px); }

/* ========= 响应式 ========= */
@media (max-width: 991px) {
    .hero-title { font-size: 2.5rem; }
    .hero-stats { gap: 32px; }
    .stat-num { font-size: 2rem; }
    .timeline { flex-direction: column; }
    .timeline::before {
        top: 0; bottom: 0; left: 32px; right: auto; width: 3px; height: auto;
    }
    .timeline-item { text-align: left; padding-left: 80px; }
    .timeline-marker { position: absolute; left: 0; margin: 0; }
    .timeline-section { position: relative; }
    .section-padding { padding: 60px 0; }
}
@media (max-width: 767px) {
    .hero-title { font-size: 2rem; }
    .hero-stats { gap: 24px; }
    .stat-num { font-size: 1.5rem; }
    .hero-actions .btn { display: block; width: 100%; margin-bottom: 12px; }
    .hero-actions .btn:last-child { margin-bottom: 0; }
    .section-title { font-size: 1.6rem; }
    .architecture-box { padding: 20px; }
    .arch-items span { font-size: 12px; padding: 4px 10px; }
    .replace-section h3 { font-size: 1.1rem; }
    .lead-title { font-size: 1.6rem; }
    .lead-form-wrapper { padding: 24px; }
}