/* ============================================
   第三套模板：蓝白科技信息服务平台风格
   主色：#2563eb (蓝色) / 明亮背景 #f8fafc
   ============================================ */

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

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #dbeafe;
    --primary-lighter: #eff6ff;
    --secondary: #64748b;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--gray-700);
    background: var(--gray-50);
    -webkit-font-smoothing: antialiased;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: all 0.2s ease;
}

a:hover {
    color: var(--primary-dark);
}

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

ul, ol {
    list-style: none;
}

/* ============ 按钮 ============ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius);
    font-size: 15px;
    font-weight: 500;
    border: none;
    cursor: pointer;
    transition: all 0.2s ease;
    text-decoration: none;
    white-space: nowrap;
}

.btn-lg {
    padding: 14px 28px;
    font-size: 16px;
    border-radius: var(--radius-lg);
}

.btn-block {
    width: 100%;
}

.btn-primary {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
}

.btn-primary:hover {
    background: var(--primary-dark);
    color: white;
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.35);
}

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

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

.btn-ghost {
    background: transparent;
    color: var(--gray-700);
    border: 1px solid var(--gray-200);
}

.btn-ghost:hover {
    background: var(--gray-100);
    color: var(--gray-800);
}

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

.btn-white:hover {
    background: var(--gray-100);
    color: var(--primary-dark);
    transform: translateY(-1px);
}

.btn-white-outline {
    background: transparent;
    color: white;
    border: 2px solid rgba(255,255,255,0.6);
}

.btn-white-outline:hover {
    background: rgba(255,255,255,0.1);
    color: white;
    border-color: white;
}

.btn-text-primary {
    background: transparent;
    color: var(--primary);
    padding: 10px 16px;
    font-weight: 600;
}

.btn-text-primary:hover {
    background: var(--primary-lighter);
}

/* ============ 导航栏 ============ */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--gray-200);
}

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

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 700;
    color: var(--gray-900);
}

.navbar-brand:hover {
    color: var(--primary);
}

.brand-logo {
    display: flex;
    align-items: center;
}

.brand-name {
    letter-spacing: -0.5px;
}

.navbar-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.navbar-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--gray-700);
    border-radius: 2px;
    transition: all 0.3s ease;
}

.navbar-toggle.active span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
}

.navbar-toggle.active span:nth-child(2) {
    opacity: 0;
}

.navbar-toggle.active span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: 32px;
}

.navbar-nav {
    display: flex;
    gap: 8px;
}

.navbar-nav a {
    display: block;
    padding: 8px 16px;
    color: var(--gray-600);
    font-weight: 500;
    border-radius: 8px;
    font-size: 15px;
}

.navbar-nav a:hover {
    color: var(--primary);
    background: var(--primary-lighter);
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

/* ============ Hero 区域 ============ */
.hero-section {
    padding: 80px 0 60px;
    background: linear-gradient(135deg, var(--primary-lighter) 0%, white 50%, #f0f9ff 100%);
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -200px;
    right: -100px;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(37,99,235,0.08) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-section .container {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: white;
    border: 1px solid var(--primary-light);
    border-radius: 100px;
    font-size: 14px;
    color: var(--primary-dark);
    font-weight: 500;
    margin-bottom: 24px;
    box-shadow: var(--shadow-sm);
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    color: var(--gray-900);
    margin-bottom: 20px;
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 32px;
    max-width: 560px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 32px;
}

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

.stat-number {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 6px;
}

.stat-label {
    font-size: 13px;
    color: var(--gray-500);
}

.hero-stat-divider {
    width: 1px;
    height: 40px;
    background: var(--gray-200);
}

.hero-visual {
    position: relative;
}

.hero-image-wrapper {
    position: relative;
}

.hero-main-image {
    width: 100%;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

.hero-floating-card {
    position: absolute;
    background: white;
    border-radius: var(--radius);
    padding: 14px 18px;
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: 12px;
    animation: float 3s ease-in-out infinite;
}

.card-trust {
    top: 24px;
    left: -24px;
}

.card-devices {
    bottom: 24px;
    right: -24px;
    animation-delay: 1s;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

.trust-icon {
    font-size: 24px;
}

.trust-title {
    font-weight: 600;
    font-size: 14px;
    color: var(--gray-900);
}

.trust-desc {
    font-size: 12px;
    color: var(--gray-500);
}

.devices-icons {
    font-size: 20px;
    display: flex;
    gap: 4px;
}

/* ============ 信任条 ============ */
.trust-bar {
    background: white;
    border-bottom: 1px solid var(--gray-200);
    padding: 20px 0;
}

.trust-items {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--gray-600);
    font-weight: 500;
}

.trust-check {
    width: 22px;
    height: 22px;
    background: var(--success);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
}

.trust-call {
    color: var(--gray-700);
    font-weight: 600;
}

.trust-call a {
    color: var(--primary);
    font-weight: 700;
}

/* ============ 通用区块 ============ */
.section {
    padding: 80px 0;
}

.section-head {
    text-align: center;
    margin-bottom: 48px;
}

.section-head.align-left {
    text-align: left;
    margin-bottom: 28px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
}

.section-desc {
    font-size: 17px;
    color: var(--gray-500);
    max-width: 600px;
    margin: 0 auto;
}

.section-head.align-left .section-desc {
    margin: 0;
    max-width: none;
}

/* ============ 平台卡片 ============ */
.platform-cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.platform-card-blue {
    background: white;
    border-radius: var(--radius-lg);
    padding: 28px;
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    color: inherit;
    display: block;
}

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

.platform-card-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
}

.platform-icon-box {
    width: 56px;
    height: 56px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    color: white;
    font-size: 16px;
}

.bg-blue { background: linear-gradient(135deg, #2563eb, #1d4ed8); }
.bg-yellow { background: linear-gradient(135deg, #f3ba2f, #d69e1e); color: #1e293b; }
.bg-cyan { background: linear-gradient(135deg, #06b6d4, #0891b2); }
.bg-orange { background: linear-gradient(135deg, #f7931a, #e6840e); }
.bg-purple { background: linear-gradient(135deg, #8b5cf6, #7c3aed); }
.bg-gray { background: linear-gradient(135deg, #64748b, #475569); }

.platform-card-header h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--gray-900);
}

.platform-card-desc {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 20px;
}

.platform-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.platform-tag {
    padding: 4px 12px;
    background: var(--gray-100);
    color: var(--gray-600);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 500;
}

.platform-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 16px;
    border-top: 1px solid var(--gray-100);
    font-weight: 600;
    color: var(--primary);
    font-size: 14px;
}

.platform-card-footer .arrow {
    transition: transform 0.2s ease;
}

.platform-card-blue:hover .arrow {
    transform: translateX(4px);
}

.risk-tag, .info-tag {
    position: absolute;
    top: 16px;
    right: 16px;
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 11px;
    font-weight: 600;
}

.risk-tag {
    background: #fef2f2;
    color: var(--danger);
    border: 1px solid #fecaca;
}

.info-tag {
    background: #fffbeb;
    color: var(--warning);
    border: 1px solid #fde68a;
}

.platform-notice {
    background: var(--primary-lighter);
    border: 1px solid var(--primary-light);
    border-radius: var(--radius);
    padding: 20px 24px;
    display: flex;
    gap: 12px;
    align-items: flex-start;
}

.notice-icon {
    font-size: 20px;
    flex-shrink: 0;
    margin-top: 2px;
}

.platform-notice p {
    font-size: 14px;
    color: var(--primary-dark);
    line-height: 1.7;
}

/* ============ 下载中心选项卡 ============ */
.download-section {
    background: white;
}

.download-tab-container {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow);
    overflow: hidden;
    border: 1px solid var(--gray-200);
}

.download-tabs {
    display: flex;
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
    padding: 8px;
    gap: 4px;
}

.download-tab {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 16px;
    background: transparent;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--gray-500);
}

.download-tab.active {
    background: white;
    color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.download-tab:hover:not(.active) {
    background: var(--gray-100);
    color: var(--gray-700);
}

.tab-emoji {
    font-size: 28px;
}

.tab-label {
    font-size: 14px;
    font-weight: 600;
}

.download-panels {
    padding: 32px;
}

.download-panel {
    display: none;
}

.download-panel.active {
    display: block;
    animation: fadeSlideIn 0.3s ease;
}

@keyframes fadeSlideIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.download-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 28px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--gray-100);
}

.download-panel-header h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--gray-900);
}

.version-info {
    font-size: 14px;
    color: var(--gray-500);
    background: var(--gray-100);
    padding: 6px 14px;
    border-radius: 100px;
}

.version-info.warning {
    background: #fef2f2;
    color: var(--danger);
}

.download-info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.download-info-card {
    background: var(--gray-50);
    border-radius: var(--radius);
    padding: 24px;
    border: 1px solid var(--gray-200);
}

.download-info-card h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.check-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.check-list li {
    font-size: 14px;
    color: var(--gray-600);
    padding-left: 24px;
    position: relative;
    line-height: 1.6;
}

.check-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: bold;
}

.check-list.warning li::before {
    content: "!";
    color: var(--danger);
    background: #fee2e2;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
    top: 2px;
}

.check-list.danger li::before {
    content: "✕";
    color: white;
    background: var(--danger);
    width: 18px;
    height: 18px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    font-weight: bold;
    top: 2px;
}

.warning-card {
    background: #fffbeb;
    border-color: #fde68a;
}

.warning-card h4 {
    color: #92400e;
}

.warning-card p {
    color: #78350f;
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 12px;
}

.danger-card {
    background: #fef2f2;
    border-color: #fecaca;
}

.danger-card h4 {
    color: #991b1b;
}

.danger-text {
    color: #991b1b !important;
    font-weight: 600;
    margin-top: 12px;
    font-size: 13px;
}

.download-action-area {
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid var(--gray-200);
}

.action-note {
    font-size: 12px;
    color: var(--gray-500);
    margin-top: 8px;
    text-align: center;
}

/* ============ 功能介绍 ============ */
.features-section {
    background: var(--gray-50);
}

.features-grid-blue {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.feature-blue-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
}

.feature-blue-card:hover {
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

.feature-icon-wrap {
    width: 52px;
    height: 52px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 18px;
    font-size: 24px;
}

.feature-icon-wrap.blue { background: #dbeafe; }
.feature-icon-wrap.indigo { background: #e0e7ff; }
.feature-icon-wrap.green { background: #d1fae5; }
.feature-icon-wrap.purple { background: #ede9fe; }
.feature-icon-wrap.red { background: #fee2e2; }
.feature-icon-wrap.yellow { background: #fef3c7; }
.feature-icon-wrap.cyan { background: #cffafe; }
.feature-icon-wrap.orange { background: #ffedd5; }

.feature-blue-card h3 {
    font-size: 17px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 10px;
}

.feature-blue-card p {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.7;
}

.risk-notice-card {
    background: #fffbeb;
    border-color: #fde68a;
}

/* ============ 安装流程 ============ */
.guide-section {
    background: white;
}

.guide-steps-blue {
    display: grid;
    grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
    gap: 0;
    align-items: start;
}

.step-blue-card {
    background: white;
    border-radius: var(--radius-lg);
    padding: 28px;
    border: 2px solid var(--gray-200);
    position: relative;
    transition: all 0.3s ease;
}

.step-blue-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow);
}

.step-number-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--primary);
    color: white;
    border-radius: 12px;
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 16px;
}

.step-blue-card h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.step-blue-card p {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 16px;
}

.step-tip-blue {
    font-size: 13px;
    color: var(--primary);
    background: var(--primary-lighter);
    padding: 10px 14px;
    border-radius: 8px;
    line-height: 1.5;
}

.step-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--gray-300);
    font-weight: bold;
    padding: 0 8px;
    margin-top: 80px;
}

/* ============ 安全中心 ============ */
.security-section {
    background: linear-gradient(135deg, #1e40af 0%, #1e3a8a 100%);
    padding: 80px 0;
}

.security-blue-container {
    background: rgba(255,255,255,0.05);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    padding: 48px;
    border: 1px solid rgba(255,255,255,0.1);
}

.security-head {
    text-align: center;
    margin-bottom: 40px;
}

.security-emoji {
    font-size: 48px;
    display: block;
    margin-bottom: 16px;
}

.security-head h2 {
    font-size: 32px;
    font-weight: 700;
    color: white;
    margin-bottom: 12px;
}

.security-head p {
    font-size: 16px;
    color: rgba(255,255,255,0.7);
}

.security-rules-blue {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 32px;
}

.rule-blue-item {
    display: flex;
    gap: 16px;
    background: rgba(255,255,255,0.08);
    padding: 20px;
    border-radius: var(--radius);
    border: 1px solid rgba(255,255,255,0.1);
    transition: all 0.3s ease;
}

.rule-blue-item:hover {
    background: rgba(255,255,255,0.12);
    transform: translateX(4px);
}

.rule-check-blue {
    width: 32px;
    height: 32px;
    min-width: 32px;
    background: var(--success);
    color: white;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
}

.rule-content-blue h4 {
    font-size: 16px;
    font-weight: 600;
    color: white;
    margin-bottom: 6px;
}

.rule-content-blue p {
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    line-height: 1.6;
}

.security-disclaimer-blue {
    background: rgba(239,68,68,0.2);
    border: 1px solid rgba(239,68,68,0.4);
    border-radius: var(--radius);
    padding: 20px;
    color: #fecaca;
    font-size: 14px;
    line-height: 1.7;
}

/* ============ 资讯列表 - 硬性规范 ============ */
.news-section {
    background: var(--gray-50);
}

/* 必须保留的资讯网格基础规则 */
ul.article-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
    list-style: none;
    margin: 0;
    padding: 0;
    width: 100%;
    box-sizing: border-box;
}

ul.article-cards > li.article-card {
    min-width: 0;
    width: auto;
    max-width: none;
    margin: 0;
    float: none;
    box-sizing: border-box;
    background: white;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--gray-200);
    transition: all 0.3s ease;
}

ul.article-cards > li.article-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
    border-color: var(--primary-light);
}

.article-card .card-thumb {
    width: 100%;
    overflow: hidden;
}

.article-card .card-thumb img {
    display: block;
    width: 100%;
    max-width: 100%;
    height: 180px;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.article-card:hover .card-thumb img {
    transform: scale(1.05);
}

.article-card .card-title {
    overflow-wrap: anywhere;
    padding: 16px 20px 8px;
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-900);
    line-height: 1.5;
}

.article-card .card-title a {
    color: var(--gray-900);
}

.article-card .card-title a:hover {
    color: var(--primary);
}

.article-card .card-date {
    display: block;
    padding: 0 20px;
    font-size: 13px;
    color: var(--gray-400);
}

.article-card .card-summary {
    overflow-wrap: anywhere;
    padding: 8px 20px 20px;
    font-size: 14px;
    color: var(--gray-500);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-more-blue {
    text-align: center;
    margin-top: 32px;
    font-size: 15px;
    color: var(--gray-600);
}

.news-more-blue a {
    font-weight: 600;
}

/* ============ FAQ ============ */
.faq-section {
    background: white;
}

.faq-blue-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.faq-blue-item {
    background: white;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all 0.2s ease;
}

.faq-blue-item:hover {
    border-color: var(--gray-300);
}

.faq-blue-item.active {
    border-color: var(--primary-light);
    box-shadow: var(--shadow-sm);
}

.faq-blue-question {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 20px 24px;
    background: white;
    border: none;
    cursor: pointer;
    text-align: left;
    font-size: 15px;
    font-weight: 500;
    color: var(--gray-800);
    transition: all 0.2s ease;
}

.faq-blue-question:hover {
    background: var(--gray-50);
}

.q-icon {
    width: 28px;
    height: 28px;
    min-width: 28px;
    background: var(--primary-lighter);
    color: var(--primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
}

.faq-blue-question span:nth-child(2) {
    flex: 1;
}

.faq-toggle {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--gray-400);
    transition: transform 0.3s ease;
}

.faq-blue-item.active .faq-toggle {
    transform: rotate(45deg);
    color: var(--primary);
}

.faq-blue-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-blue-item.active .faq-blue-answer {
    max-height: 300px;
}

.faq-blue-answer p {
    padding: 0 24px 20px;
    padding-left: 66px;
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.8;
}

/* ============ 关于我们 ============ */
.about-section {
    background: var(--gray-50);
}

.about-blue-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 48px;
    align-items: start;
}

.about-intro-blue {
    font-size: 16px;
    color: var(--gray-600);
    line-height: 1.8;
    margin-bottom: 20px;
}

.services-blue-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
    margin: 28px 0;
}

.service-blue-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--gray-700);
}

.service-check-blue {
    width: 24px;
    height: 24px;
    min-width: 24px;
    background: var(--success);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: bold;
}

.about-statement-blue {
    background: var(--primary-lighter);
    border: 1px solid var(--primary-light);
    border-radius: var(--radius);
    padding: 20px;
    font-size: 14px;
    color: var(--primary-dark);
    line-height: 1.8;
}

.about-statement-blue strong {
    color: var(--primary-dark);
}

.side-card-blue {
    background: white;
    border-radius: var(--radius-lg);
    padding: 28px;
    border: 1px solid var(--gray-200);
    margin-bottom: 20px;
}

.side-card-blue h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.side-card-blue p {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 20px;
}

.warning-side {
    background: #fffbeb;
    border-color: #fde68a;
}

.warning-side h4 {
    color: #92400e;
}

.warning-side p {
    color: #78350f;
}

/* ============ 联系我们 ============ */
.contact-section {
    background: white;
}

.contact-blue-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    background: var(--gray-50);
    border-radius: var(--radius-xl);
    padding: 48px;
    border: 1px solid var(--gray-200);
}

.contact-methods-blue {
    display: flex;
    flex-direction: column;
    gap: 20px;
    margin-top: 24px;
}

.contact-method-blue {
    display: flex;
    gap: 16px;
    padding: 20px;
    background: white;
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
}

.warning-contact {
    background: #fef2f2 !important;
    border-color: #fecaca !important;
}

.method-icon-blue {
    width: 48px;
    height: 48px;
    min-width: 48px;
    background: var(--primary-lighter);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

.warning-contact .method-icon-blue {
    background: #fee2e2;
}

.contact-method-blue h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 6px;
}

.contact-phone-big {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    display: block;
    margin-bottom: 6px;
}

.contact-method-blue p {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.6;
}

.method-note-blue {
    font-size: 12px !important;
    color: var(--gray-400) !important;
    margin-top: 4px;
}

.warning-contact h4 {
    color: #991b1b;
}

.warning-contact p {
    color: #7f1d1d;
}

.contact-form-blue {
    background: white;
    border-radius: var(--radius-lg);
    padding: 32px;
    border: 1px solid var(--gray-200);
}

.contact-form-blue h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 8px;
}

.form-desc-blue {
    font-size: 14px;
    color: var(--gray-500);
    margin-bottom: 24px;
}

.form-row-blue {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

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

.form-group-blue label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: 8px;
}

.form-group-blue input,
.form-group-blue select,
.form-group-blue textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: inherit;
    background: var(--gray-50);
    transition: all 0.2s ease;
    color: var(--gray-700);
}

.form-group-blue input:focus,
.form-group-blue select:focus,
.form-group-blue textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: white;
    box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
}

.form-checkbox-blue {
    margin-bottom: 20px;
}

.form-checkbox-blue label {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 13px;
    color: var(--gray-600);
    cursor: pointer;
    line-height: 1.5;
}

.form-checkbox-blue input {
    margin-top: 2px;
}

.form-success-blue {
    text-align: center;
    padding: 40px 20px;
}

.success-icon-blue {
    width: 64px;
    height: 64px;
    background: var(--success);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    font-weight: bold;
    margin: 0 auto 20px;
}

.form-success-blue h4 {
    font-size: 20px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.form-success-blue p {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 8px;
}

.form-success-blue a {
    font-weight: 600;
}

/* ============ CTA 横幅 ============ */
.cta-banner {
    background: linear-gradient(135deg, var(--primary) 0%, #1d4ed8 100%);
    padding: 48px 0;
}

.cta-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 24px;
}

.cta-text h2 {
    font-size: 28px;
    font-weight: 700;
    color: white;
    margin-bottom: 8px;
}

.cta-text p {
    font-size: 16px;
    color: rgba(255,255,255,0.8);
}

.cta-buttons {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

/* ============ 页脚 ============ */
.site-footer {
    background: var(--gray-900);
    color: var(--gray-400);
    padding: 64px 0 32px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.8fr 1fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 48px;
}

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

.footer-description {
    font-size: 14px;
    line-height: 1.8;
    color: var(--gray-400);
    margin-bottom: 20px;
}

.footer-phone {
    font-size: 20px;
    font-weight: 700;
    color: white;
}

.footer-col h6 {
    font-size: 14px;
    font-weight: 600;
    color: white;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-col a {
    font-size: 14px;
    color: var(--gray-400);
    transition: color 0.2s ease;
}

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

.footer-col a.demo-link {
    color: var(--gray-500);
    font-style: italic;
}

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid var(--gray-800);
}

.footer-copyright {
    font-size: 14px;
    color: var(--gray-500);
    margin-bottom: 12px;
}

.footer-disclaimer {
    font-size: 12px;
    color: var(--gray-600);
    line-height: 1.7;
}

/* ============ 弹窗 ============ */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.modal.active {
    display: flex;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15,23,42,0.6);
    backdrop-filter: blur(4px);
}

.modal-dialog {
    position: relative;
    background: white;
    border-radius: var(--radius-xl);
    max-width: 480px;
    width: 100%;
    z-index: 1;
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(10px); }
    to { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-content {
    padding: 40px 32px 32px;
    text-align: center;
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    border: none;
    background: var(--gray-100);
    color: var(--gray-600);
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.modal-close:hover {
    background: var(--gray-200);
}

.modal-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.modal-content h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 16px;
}

.modal-content p {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.7;
    margin-bottom: 12px;
}

.modal-confirm {
    margin-top: 20px;
    width: 100%;
}

/* ============ 文章详情页 ============ */
.article-detail-blue {
    padding: 40px 0 80px;
    background: var(--gray-50);
    min-height: 60vh;
}

.article-container {
    max-width: 860px;
}

.article-container .breadcrumb,
.article-container .breadcrumb a {
    font-size: 14px;
    color: var(--gray-500);
    margin-bottom: 28px;
}

.article-header-blue {
    margin-bottom: 28px;
}

.article-title-blue {
    font-size: 36px;
    font-weight: 700;
    color: var(--gray-900);
    line-height: 1.3;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}

.article-meta-blue {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
    font-size: 14px;
    color: var(--gray-500);
}

.meta-divider {
    color: var(--gray-300);
}

.article-summary-blue {
    background: white;
    border-left: 4px solid var(--primary);
    padding: 20px 24px;
    border-radius: 0 var(--radius) var(--radius) 0;
    margin-bottom: 32px;
    box-shadow: var(--shadow-sm);
}

.article-summary-blue p {
    font-size: 16px;
    color: var(--gray-700);
    line-height: 1.8;
    font-style: italic;
    margin: 0;
}

.article-cover-blue {
    margin-bottom: 40px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.article-cover-img {
    width: 100%;
    display: block;
}

.article-content-blue {
    background: white;
    padding: 48px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    font-size: 16px;
    line-height: 1.9;
    color: var(--gray-700);
    margin-bottom: 40px;
}

.article-content-blue h2 {
    font-size: 26px;
    font-weight: 700;
    color: var(--gray-900);
    margin: 40px 0 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--gray-100);
}

.article-content-blue h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--gray-900);
    margin: 32px 0 16px;
}

.article-content-blue p {
    margin-bottom: 20px;
}

.article-content-blue img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius);
    margin: 24px 0;
}

.article-content-blue ul,
.article-content-blue ol {
    margin-bottom: 20px;
    padding-left: 24px;
}

.article-content-blue ul {
    list-style: disc;
}

.article-content-blue ol {
    list-style: decimal;
}

.article-content-blue li {
    margin-bottom: 10px;
}

.article-content-blue blockquote {
    background: var(--primary-lighter);
    border-left: 4px solid var(--primary);
    padding: 20px 24px;
    border-radius: 0 var(--radius) var(--radius) 0;
    margin: 24px 0;
    color: var(--primary-dark);
}

.related-guide-blue {
    background: white;
    border-radius: var(--radius-lg);
    padding: 32px;
    margin-bottom: 32px;
    box-shadow: var(--shadow-sm);
}

.related-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 20px;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.related-item-blue {
    display: flex;
    gap: 14px;
    padding: 18px;
    background: var(--gray-50);
    border-radius: var(--radius);
    border: 1px solid var(--gray-200);
    color: inherit;
    transition: all 0.2s ease;
}

.related-item-blue:hover {
    border-color: var(--primary);
    background: var(--primary-lighter);
    transform: translateY(-2px);
}

.related-emoji {
    font-size: 28px;
}

.related-item-blue h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 4px;
}

.related-item-blue p {
    font-size: 13px;
    color: var(--gray-500);
}

.article-navigation-blue {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

.back-to-list-blue {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--gray-600);
    font-weight: 500;
}

.back-to-list-blue:hover {
    color: var(--primary);
}

.article-phone-btn-blue {
    padding: 12px 24px;
    background: var(--primary);
    color: white;
    border-radius: var(--radius);
    font-weight: 500;
}

.article-phone-btn-blue:hover {
    background: var(--primary-dark);
    color: white;
}

.article-cta-blue {
    background: var(--primary-lighter);
    padding: 48px 0;
}

.article-cta-inner-blue {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 24px;
}

.article-cta-inner-blue h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 8px;
}

.article-cta-inner-blue p {
    font-size: 15px;
    color: var(--gray-600);
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
    .hero-section .container {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .hero-visual {
        max-width: 500px;
        margin: 0 auto;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .platform-cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .features-grid-blue {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .guide-steps-blue {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .step-arrow {
        display: none;
    }
    
    .download-info-grid {
        grid-template-columns: 1fr;
    }
    
    .security-rules-blue {
        grid-template-columns: 1fr;
    }
    
    .about-blue-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-blue-container {
        grid-template-columns: 1fr;
        padding: 32px 24px;
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }
    
    .related-grid {
        grid-template-columns: 1fr;
    }
    
    .faq-blue-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .navbar-toggle {
        display: flex;
    }
    
    .navbar-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        gap: 20px;
        border-bottom: 1px solid var(--gray-200);
        box-shadow: var(--shadow-lg);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all 0.3s ease;
    }
    
    .navbar-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .navbar-nav {
        flex-direction: column;
        width: 100%;
        gap: 4px;
    }
    
    .navbar-nav a {
        padding: 12px 16px;
    }
    
    .navbar-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .navbar-actions .btn {
        width: 100%;
    }
    
    .hero-section {
        padding: 40px 0;
    }
    
    .hero-title {
        font-size: 32px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .hero-actions .btn {
        width: 100%;
    }
    
    .hero-stats {
        gap: 20px;
    }
    
    .hero-floating-card {
        display: none;
    }
    
    .section {
        padding: 48px 0;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .platform-cards-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid-blue {
        grid-template-columns: 1fr;
    }
    
    .download-tabs {
        overflow-x: auto;
    }
    
    .download-tab {
        min-width: 80px;
        padding: 12px 8px;
    }
    
    .download-panels {
        padding: 20px;
    }
    
    .services-blue-list {
        grid-template-columns: 1fr;
    }
    
    .form-row-blue {
        grid-template-columns: 1fr;
    }
    
    .cta-inner {
        flex-direction: column;
        text-align: center;
    }
    
    .cta-buttons {
        width: 100%;
    }
    
    .cta-buttons .btn {
        flex: 1;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }
    
    .footer-brand-col {
        padding-bottom: 20px;
        border-bottom: 1px solid var(--gray-800);
    }
    
    .trust-items {
        justify-content: center;
    }
    
    .article-title-blue {
        font-size: 26px;
    }
    
    .article-content-blue {
        padding: 24px 20px;
    }
    
    .security-blue-container {
        padding: 32px 20px;
    }
    
    .article-navigation-blue {
        flex-direction: column;
    }
    
    .article-navigation-blue .btn {
        width: 100%;
    }
    
    .article-cta-inner-blue {
        text-align: center;
        justify-content: center;
    }
    
    .article-cta-inner-blue .cta-buttons {
        justify-content: center;
    }
}

/* ============ 动效与无障碍 ============ */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    
    html {
        scroll-behavior: auto;
    }
}