/* ========== 基础变量 ========== */
:root {
    --primary: #1677ff;
    --primary-dark: #0958d9;
    --primary-light: #e6f0ff;
    --secondary: #722ed1;
    --accent: #00b96b;
    --warning: #fa8c16;
    --danger: #ff4d4f;
    --text-1: #1a1a1a;
    --text-2: #4a4a4a;
    --text-3: #8c8c8c;
    --text-4: #bfbfbf;
    --bg-1: #ffffff;
    --bg-2: #f7f9fc;
    --bg-3: #f0f4fa;
    --border: #ebeef5;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 16px 48px rgba(22, 119, 255, 0.15);
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --gradient-1: linear-gradient(135deg, #1677ff 0%, #722ed1 100%);
    --gradient-2: linear-gradient(135deg, #00b96b 0%, #1677ff 100%);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue",
                 Helvetica, Arial, sans-serif;
    font-size: 15px;
    line-height: 1.65;
    color: var(--text-1);
    background: var(--bg-1);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

ul {
    list-style: none;
}

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

.container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========== 通用按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 10px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-1);
    color: #fff;
    box-shadow: 0 4px 12px rgba(22, 119, 255, 0.25);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(22, 119, 255, 0.35);
}

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

.btn-ghost:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-2px);
}

.btn-ghost-white {
    background: transparent;
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.6);
}

.btn-ghost-white:hover {
    background: #fff;
    color: var(--primary);
}

.btn-lg {
    padding: 14px 32px;
    font-size: 16px;
}

.btn-block {
    display: flex;
    width: 100%;
}

/* ========== 顶部信息条 ========== */
.topbar {
    background: #001529;
    color: rgba(255, 255, 255, 0.75);
    font-size: 13px;
    line-height: 36px;
}

.topbar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.topbar-right {
    display: flex;
    gap: 24px;
}

.topbar-right a:hover {
    color: #fff;
}

/* ========== 顶部导航 ========== */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.header.scrolled {
    box-shadow: var(--shadow-sm);
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
    gap: 32px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

.logo-icon {
    width: 44px;
    height: 44px;
    background: transparent;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: visible;
    flex-shrink: 0;
    transition: var(--transition);
}

.logo:hover .logo-icon {
    transform: rotate(-8deg) scale(1.08);
}

.logo-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
    filter: drop-shadow(0 2px 6px rgba(245, 130, 32, 0.25));
}

.logo-text strong {
    display: block;
    font-size: 18px;
    font-weight: 700;
    color: var(--text-1);
    line-height: 1.2;
}

.logo-text small {
    display: block;
    font-size: 10px;
    color: var(--text-3);
    letter-spacing: 1px;
}

.nav {
    display: flex;
    gap: 4px;
    flex: 1;
    justify-content: center;
}

.nav a {
    padding: 8px 14px;
    font-size: 15px;
    color: var(--text-2);
    border-radius: var(--radius-sm);
    position: relative;
    font-weight: 500;
}

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

.nav a.active::after {
    content: '';
    position: absolute;
    bottom: -22px;
    left: 50%;
    transform: translateX(-50%);
    width: 24px;
    height: 3px;
    background: var(--gradient-1);
    border-radius: 3px;
}

.btn-trial {
    flex-shrink: 0;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
}

.hamburger span {
    width: 24px;
    height: 2px;
    background: var(--text-1);
    transition: var(--transition);
}

/* ========== Hero ========== */
.hero {
    position: relative;
    padding: 60px 0 100px;
    overflow: hidden;
    background: linear-gradient(180deg, #f0f5ff 0%, #ffffff 100%);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(circle at 20% 30%, rgba(22, 119, 255, 0.12), transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(114, 46, 209, 0.10), transparent 50%);
    pointer-events: none;
}

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

.hero-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(22, 119, 255, 0.1);
    color: var(--primary);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 20px;
}

.hero-text h1 {
    font-size: 52px;
    line-height: 1.2;
    font-weight: 800;
    color: var(--text-1);
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.gradient-text {
    background: var(--gradient-1);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-desc {
    font-size: 16px;
    color: var(--text-2);
    line-height: 1.8;
    margin-bottom: 32px;
}

.hero-desc strong {
    color: var(--primary);
    font-weight: 600;
}

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

.hero-stats {
    display: flex;
    gap: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.hero-stats > div {
    display: flex;
    flex-direction: column;
}

.hero-stats strong {
    font-size: 28px;
    font-weight: 800;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.hero-stats span {
    font-size: 13px;
    color: var(--text-3);
    margin-top: 4px;
}

/* ========== Hero Dashboard 视觉 ========== */
.hero-visual {
    position: relative;
}

.dashboard-card {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
    transform: rotate(-1deg);
    transition: var(--transition);
}

.dashboard-card:hover {
    transform: rotate(0deg) translateY(-4px);
}

.dashboard-header {
    background: #f7f9fc;
    padding: 14px 20px;
    display: flex;
    align-items: center;
    gap: 14px;
    border-bottom: 1px solid var(--border);
    font-size: 13px;
    color: var(--text-2);
    font-weight: 500;
}

.dashboard-dots {
    display: flex;
    gap: 6px;
}

.dashboard-dots i {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #ddd;
}

.dashboard-dots i:nth-child(1) { background: #ff5f57; }
.dashboard-dots i:nth-child(2) { background: #ffbd2e; }
.dashboard-dots i:nth-child(3) { background: #28c941; }

.dashboard-body {
    padding: 20px;
}

.metric-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-bottom: 20px;
}

.metric {
    background: linear-gradient(135deg, #f0f5ff 0%, #f9faff 100%);
    padding: 14px;
    border-radius: var(--radius-md);
}

.metric-label {
    display: block;
    font-size: 12px;
    color: var(--text-3);
    margin-bottom: 6px;
}

.metric-value {
    display: block;
    font-size: 22px;
    font-weight: 700;
    color: var(--text-1);
    line-height: 1.2;
}

.metric-up {
    display: inline-block;
    margin-top: 4px;
    font-size: 11px;
    color: var(--accent);
    background: rgba(0, 185, 107, 0.1);
    padding: 1px 6px;
    border-radius: 4px;
}

.chart-bar {
    display: flex;
    align-items: flex-end;
    gap: 8px;
    height: 80px;
    margin-bottom: 20px;
    padding: 0 4px;
}

.chart-bar > div {
    flex: 1;
    background: var(--gradient-1);
    border-radius: 4px 4px 0 0;
    opacity: 0.85;
    animation: barUp 1s ease-out;
}

@keyframes barUp {
    from { height: 0 !important; }
}

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

.cust-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px;
    background: #f7f9fc;
    border-radius: var(--radius-sm);
    font-size: 13px;
}

.cust-item > div {
    flex: 1;
}

.cust-item b {
    display: block;
    color: var(--text-1);
    font-weight: 600;
}

.cust-item small {
    color: var(--text-3);
    font-size: 11px;
}

.cust-item em {
    font-style: normal;
    font-size: 11px;
    color: var(--warning);
    font-weight: 600;
}

.avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 600;
    flex-shrink: 0;
}

.avatar.a1 { background: linear-gradient(135deg, #ff6b6b, #ee5a52); }
.avatar.a2 { background: linear-gradient(135deg, #1677ff, #4096ff); }
.avatar.a3 { background: linear-gradient(135deg, #722ed1, #9254de); }

.float-card {
    position: absolute;
    background: #fff;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    animation: floatY 4s ease-in-out infinite;
}

.float-card span {
    font-size: 24px;
}

.float-card b {
    display: block;
    color: var(--text-1);
    font-weight: 600;
}

.float-card small {
    color: var(--text-3);
    font-size: 11px;
}

.float-1 {
    top: 20px;
    left: -40px;
    animation-delay: 0s;
}

.float-2 {
    bottom: 40px;
    right: -30px;
    animation-delay: 2s;
}

@keyframes floatY {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

/* ========== 品牌滚动 ========== */
.brands {
    padding: 40px 0;
    background: var(--bg-2);
    overflow: hidden;
}

.brands-title {
    text-align: center;
    color: var(--text-3);
    font-size: 14px;
    margin-bottom: 24px;
}

.brands-track {
    display: flex;
    gap: 60px;
    animation: scroll 30s linear infinite;
    width: max-content;
}

.brands:hover .brands-track {
    animation-play-state: paused;
}

.brand {
    color: var(--text-2);
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 0.5px;
    flex-shrink: 0;
    opacity: 0.75;
    transition: var(--transition);
    padding: 8px 20px;
    border-radius: 100px;
    background: #fff;
    border: 1px solid var(--border);
    white-space: nowrap;
}

.brand:hover {
    opacity: 1;
    color: var(--primary);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

@keyframes scroll {
    from { transform: translateX(0); }
    to { transform: translateX(-50%); }
}

/* ========== 通用 Section ========== */
.section {
    padding: 100px 0;
}

.section-gray {
    background: var(--bg-2);
}

.section-head {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 4px 14px;
    background: rgba(22, 119, 255, 0.08);
    color: var(--primary);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 38px;
    font-weight: 800;
    color: var(--text-1);
    margin-bottom: 14px;
    letter-spacing: -0.5px;
}

.section-sub {
    font-size: 16px;
    color: var(--text-3);
    max-width: 680px;
    margin: 0 auto;
}

/* ========== 核心功能 ========== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-1);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: transparent;
}

.feature-card:hover::before {
    transform: scaleX(1);
}

.feature-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 20px;
}

.icon-1 { background: linear-gradient(135deg, #ffeaea, #ffd6d6); }
.icon-2 { background: linear-gradient(135deg, #e6f4ff, #bae0ff); }
.icon-3 { background: linear-gradient(135deg, #f0e6ff, #d3adf7); }
.icon-4 { background: linear-gradient(135deg, #fff7e6, #ffe7ba); }
.icon-5 { background: linear-gradient(135deg, #e6fffb, #b5f5ec); }
.icon-6 { background: linear-gradient(135deg, #fcf4ff, #efdbff); }

.feature-card h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-1);
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-2);
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 16px;
}

.feature-card ul li {
    font-size: 13px;
    color: var(--text-3);
    padding: 4px 0;
}

/* ========== 应用场景 Tabs ========== */
.scenarios-tabs {
    background: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.tab-nav {
    display: flex;
    overflow-x: auto;
    border-bottom: 1px solid var(--border);
    background: #fafbfd;
}

.tab-btn {
    flex: 1;
    min-width: 110px;
    padding: 18px 14px;
    border: none;
    background: transparent;
    font-size: 15px;
    color: var(--text-2);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
    position: relative;
    white-space: nowrap;
}

.tab-btn:hover {
    color: var(--primary);
}

.tab-btn.active {
    color: var(--primary);
    background: #fff;
}

.tab-btn.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 20%;
    right: 20%;
    height: 3px;
    background: var(--gradient-1);
    border-radius: 3px;
}

.tab-content {
    padding: 48px;
}

.tab-panel {
    display: none;
    grid-template-columns: 1.2fr 1fr;
    gap: 48px;
    align-items: center;
}

.tab-panel.active {
    display: grid;
    animation: fadeIn 0.4s ease-out;
}

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

.tab-text h3 {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-1);
    margin-bottom: 14px;
}

.tab-text > p {
    color: var(--text-2);
    line-height: 1.8;
    margin-bottom: 24px;
}

.tab-list {
    margin-bottom: 28px;
}

.tab-list li {
    padding: 12px 0;
    border-bottom: 1px dashed var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
}

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

.tab-list b {
    width: 100px;
    color: var(--primary);
    font-weight: 600;
    flex-shrink: 0;
    font-size: 14px;
}

.tab-list span {
    color: var(--text-2);
    font-size: 14px;
}

.tab-visual {
    background: linear-gradient(135deg, #f0f5ff, #fff);
    border-radius: var(--radius-lg);
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 120px;
    box-shadow: inset 0 0 60px rgba(22, 119, 255, 0.05);
}

/* ========== 优势卡片 ========== */
.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.adv-card {
    background: #fff;
    padding: 36px 28px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    position: relative;
    transition: var(--transition);
}

.adv-card:hover {
    background: var(--gradient-1);
    border-color: transparent;
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.adv-card:hover h4,
.adv-card:hover p {
    color: #fff;
}

.adv-card:hover .adv-num {
    color: rgba(255, 255, 255, 0.25);
}

.adv-num {
    font-size: 60px;
    font-weight: 800;
    color: var(--primary-light);
    line-height: 1;
    margin-bottom: 16px;
    transition: var(--transition);
}

.adv-card h4 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-1);
    margin-bottom: 12px;
    transition: var(--transition);
}

.adv-card p {
    color: var(--text-2);
    font-size: 14px;
    line-height: 1.7;
    transition: var(--transition);
}

/* ========== 客户案例 ========== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 28px;
}

.case-card {
    background: #fff;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.case-img {
    aspect-ratio: 16/9;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 32px;
    font-weight: 800;
    letter-spacing: 2px;
}

.case-img-1 { background: linear-gradient(135deg, #1677ff, #722ed1); }
.case-img-2 { background: linear-gradient(135deg, #00b96b, #1677ff); }
.case-img-3 { background: linear-gradient(135deg, #fa8c16, #f5222d); }

.case-body {
    padding: 24px;
}

.case-tag {
    display: inline-block;
    padding: 3px 10px;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 12px;
    border-radius: 4px;
    margin-bottom: 12px;
    font-weight: 500;
}

.case-body h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-1);
    margin-bottom: 12px;
}

.case-body p {
    color: var(--text-2);
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 16px;
}

.case-link {
    color: var(--primary);
    font-size: 14px;
    font-weight: 500;
}

.case-link:hover {
    color: var(--primary-dark);
}

/* ========== 价格方案 ========== */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.pricing-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    position: relative;
    transition: var(--transition);
}

.pricing-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary);
}

.pricing-popular {
    background: linear-gradient(180deg, #f0f5ff 0%, #fff 50%);
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.pricing-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-1);
    color: #fff;
    font-size: 12px;
    padding: 4px 14px;
    border-radius: 100px;
    font-weight: 600;
}

.pricing-name {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-1);
    margin-bottom: 6px;
}

.pricing-desc {
    font-size: 13px;
    color: var(--text-3);
    margin-bottom: 20px;
    height: 38px;
}

.pricing-price {
    font-size: 40px;
    font-weight: 800;
    color: var(--text-1);
    line-height: 1;
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border);
}

.pricing-price span {
    font-size: 18px;
    vertical-align: top;
    margin-right: 2px;
    color: var(--text-2);
}

.pricing-price small {
    display: block;
    font-size: 13px;
    color: var(--text-3);
    font-weight: 400;
    margin-top: 6px;
}

.pricing-features {
    margin-bottom: 28px;
    min-height: 240px;
}

.pricing-features li {
    padding: 8px 0;
    font-size: 14px;
    color: var(--text-2);
}

.pricing-features li.disabled {
    color: var(--text-4);
}

/* ========== 客户评价 ========== */
.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.testi-card {
    background: #fff;
    padding: 32px 28px;
    border-radius: var(--radius-lg);
    position: relative;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.testi-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.testi-card::before {
    content: '"';
    position: absolute;
    top: 8px;
    left: 20px;
    font-size: 80px;
    line-height: 1;
    color: var(--primary-light);
    font-family: Georgia, serif;
    font-weight: 800;
}

.testi-card p {
    position: relative;
    font-size: 15px;
    color: var(--text-2);
    line-height: 1.8;
    margin-bottom: 24px;
    z-index: 1;
}

.testi-author {
    display: flex;
    align-items: center;
    gap: 12px;
}

.testi-author b {
    display: block;
    color: var(--text-1);
    font-weight: 600;
    font-size: 14px;
}

.testi-author small {
    color: var(--text-3);
    font-size: 12px;
}

/* ========== CTA ========== */
.cta {
    padding: 80px 0;
    background: var(--gradient-1);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.cta::before, .cta::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
}

.cta::before {
    width: 300px;
    height: 300px;
    top: -100px;
    left: -50px;
}

.cta::after {
    width: 400px;
    height: 400px;
    bottom: -150px;
    right: -100px;
}

.cta-inner {
    position: relative;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap;
}

.cta h2 {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 10px;
}

.cta p {
    font-size: 16px;
    opacity: 0.9;
}

.cta-btns {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

.cta .btn-primary {
    background: #fff;
    color: var(--primary);
}

.cta .btn-primary:hover {
    background: #f0f5ff;
}

/* ========== 页脚 ========== */
.footer {
    background: #0a1929;
    color: rgba(255, 255, 255, 0.65);
    padding: 70px 0 0;
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    padding-bottom: 50px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-brand p {
    margin: 16px 0;
    font-size: 14px;
    line-height: 1.8;
}

.footer-contact p {
    font-size: 13px;
    line-height: 2;
}

.footer-contact a:hover {
    color: var(--primary);
}

.footer-col h5 {
    color: #fff;
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 18px;
}

.footer-col a {
    display: block;
    padding: 6px 0;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-col a:hover {
    color: var(--primary);
    transform: translateX(2px);
}

.footer-qr .qr-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.qr-code {
    width: 100px;
    height: 100px;
    background: #fff;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-3);
    font-weight: 700;
    font-size: 18px;
    letter-spacing: 2px;
}

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

.footer-bottom {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    text-align: center;
    padding: 24px 0;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.75);
    background: var(--bg-dark, #1a1a2e);
}

.footer-bottom p {
    margin: 4px 0;
}

/* ========== 浮动按钮 ========== */
.float-cta {
    position: fixed;
    right: 20px;
    bottom: 80px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 99;
}

.float-btn {
    width: 60px;
    height: 60px;
    background: #fff;
    border-radius: 50%;
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-2);
    transition: var(--transition);
    font-size: 11px;
}

.float-btn span {
    font-size: 22px;
    line-height: 1;
    margin-bottom: 2px;
}

.float-btn em {
    font-style: normal;
    font-size: 10px;
}

.float-btn:hover {
    transform: scale(1.08);
    background: var(--gradient-1);
    color: #fff;
}

.float-btn-primary {
    background: var(--gradient-1);
    color: #fff;
}

.float-btn-primary:hover {
    transform: scale(1.08) rotate(-5deg);
}

.float-btn-top {
    opacity: 0;
    pointer-events: none;
    transition: var(--transition);
}

.float-btn-top.show {
    opacity: 1;
    pointer-events: auto;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
    .nav { display: none; }
    .hamburger { display: flex; }
    .nav.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #fff;
        padding: 20px;
        box-shadow: var(--shadow-md);
        gap: 0;
    }
    .nav.open a { padding: 12px; }
    .nav.open a.active::after { display: none; }

    .hero-inner { grid-template-columns: 1fr; gap: 40px; }
    .hero-text h1 { font-size: 40px; }
    .features-grid,
    .advantages-grid,
    .cases-grid,
    .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
    .pricing-grid { grid-template-columns: repeat(2, 1fr); }
    .footer-top { grid-template-columns: 1fr 1fr 1fr; }
    .footer-brand { grid-column: 1 / -1; }
    .tab-panel { grid-template-columns: 1fr; }
    .tab-visual { font-size: 80px; aspect-ratio: 16/9; }
    .tab-content { padding: 32px 24px; }
}

@media (max-width: 640px) {
    .topbar-right { display: none; }
    .btn-trial { display: none; }
    .hero { padding: 40px 0 60px; }
    .hero-text h1 { font-size: 32px; }
    .hero-desc { font-size: 14px; }
    .hero-btns { flex-direction: column; }
    .hero-btns .btn { width: 100%; }
    .hero-stats { gap: 20px; flex-wrap: wrap; }
    .hero-stats strong { font-size: 22px; }
    .float-card { display: none; }
    .section { padding: 60px 0; }
    .section-title { font-size: 26px; }
    .features-grid,
    .advantages-grid,
    .cases-grid,
    .testimonials-grid,
    .pricing-grid { grid-template-columns: 1fr; }
    .footer-top { grid-template-columns: 1fr 1fr; gap: 30px; }
    .cta-inner { flex-direction: column; text-align: center; }
    .cta h2 { font-size: 24px; }
    .float-cta { right: 12px; bottom: 12px; }
    .float-btn { width: 50px; height: 50px; }
    .float-btn span { font-size: 18px; }
}

/* ========== 滚动动画 ========== */
.animate-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.animate-in.show {
    opacity: 1;
    transform: translateY(0);
}