/* ========================================
   知见台GEO 落地页 - 宝塔风格
   主题色：#FF6600（知见台橙）
======================================== */

/* === CSS Variables === */
:root {
    --primary: #FF6600;
    --primary-light: #FF8533;
    --primary-dark: #E65C00;
    --primary-glow: rgba(255, 102, 0, 0.4);
    --dark-bg: #0D1117;
    --dark-card: #161B22;
    --dark-border: #30363D;
    --text-primary: #F0F6FC;
    --text-secondary: #8B949E;
    --text-dark: #1F2328;
    --white: #FFFFFF;
    --light-bg: #F6F8FA;
    --success: #3FB950;
    --warning: #D29922;
    --danger: #F85149;
}

/* === Reset & Base === */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
    color: var(--text-dark);
    background: var(--white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

a {
    color: inherit;
    text-decoration: none;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* === Header (深色科技感) === */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(13, 17, 23, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--dark-border);
    height: 70px;
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

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

.logo-icon {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 900;
    color: var(--white);
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-geo {
    color: var(--primary);
    margin-left: 2px;
}

.nav {
    display: flex;
    gap: 32px;
}

.nav a {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
    position: relative;
}

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

.nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

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

.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* 移动端汉堡按钮（默认隐藏，≤1024px 显示） */
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    padding: 0;
    background: transparent;
    border: none;
    cursor: pointer;
}

.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    margin: 0 auto;
    background: var(--text-primary);
    border-radius: 2px;
    transition: transform 0.3s ease, opacity 0.3s ease;
}

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

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

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

/* === Hero Section (深色科技感首屏) === */
.hero {
    position: relative;
    min-height: 100vh;
    background: linear-gradient(180deg, var(--dark-bg) 0%, #1A1F2E 100%);
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.hero-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 102, 0, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 102, 0, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: gridMove 20s linear infinite;
}

@keyframes gridMove {
    0% {
        transform: translate(0, 0);
    }

    100% {
        transform: translate(60px, 60px);
    }
}

.hero-glow {
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 600px;
    background: radial-gradient(ellipse, var(--primary-glow) 0%, transparent 70%);
    opacity: 0.5;
    filter: blur(80px);
}

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

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: rgba(255, 102, 0, 0.1);
    border: 1px solid rgba(255, 102, 0, 0.3);
    border-radius: 50px;
    font-size: 14px;
    color: var(--primary);
    margin-bottom: 32px;
}

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

@keyframes pulse {

    0%,
    100% {
        opacity: 1;
        transform: scale(1);
    }

    50% {
        opacity: 0.5;
        transform: scale(1.2);
    }
}

.hero-title {
    font-size: 56px;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: 24px;
    letter-spacing: -1px;
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 18px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 40px;
}

.hero-actions {
    display: flex;
    justify-content: center;
    align-items: stretch;
    gap: 16px;
    margin-bottom: 72px;
    flex-wrap: wrap;
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    border-color: var(--primary);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--primary-glow);
}

.btn-glow {
    flex-direction: column;
    padding: 16px 40px;
}

.btn-glow .btn-price {
    font-size: 13px;
    font-weight: 400;
    opacity: 0.9;
}

.btn-glow {
    min-height: 72px;
}

.btn-outline {
    background: transparent;
    color: #e7e7e7;
    border-color: var(--dark-border);
}

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

.btn-icon {
    font-size: 12px;
}

.btn-icon.iconfont {
    font-size: 14px;
}

/* === Hero Stats === */
.hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    padding: 32px 48px;
    background: rgba(22, 27, 34, 0.8);
    border: 1px solid var(--dark-border);
    border-radius: 16px;
    backdrop-filter: blur(10px);
    max-width: 800px;
    margin: 0 auto;
}

.stat-item {
    text-align: center;
    position: relative;
}

.stat-num {
    font-size: 32px;
    font-weight: 900;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 8px;
}

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

/* 可点击的统计项（引导用户往下看详情） */
.stat-item-link {
    cursor: pointer;
    border-radius: 10px;
    padding: 6px 12px;
    margin: -6px -12px;
    transition: background 0.25s ease, transform 0.25s ease;
}

.stat-item-link:hover,
.stat-item-link:focus-visible {
    background: rgba(255, 102, 0, 0.1);
    transform: translateY(-2px);
    outline: none;
}

.stat-item-link .stat-label {
    transition: color 0.25s ease;
}

.stat-item-link:hover .stat-label {
    color: var(--primary);
}

.stat-hint {
    position: absolute;
    left: 50%;
    bottom: -16px;
    transform: translateX(-50%) translateY(4px);
    white-space: nowrap;
    font-size: 11px;
    color: var(--primary);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease, transform 0.25s ease;
}

.stat-item-link:hover .stat-hint,
.stat-item-link:focus-visible .stat-hint {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--dark-border);
}

/* === Section Common === */
.section {
    padding: 60px 0;
}

.section:nth-child(even) {
    background: var(--light-bg);
}

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

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    background: rgba(255, 102, 0, 0.1);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    border-radius: 50px;
    margin-bottom: 16px;
}

.section-title {
    font-size: 36px;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: 12px;
    letter-spacing: -0.5px;
}

.section-subtitle {
    font-size: 16px;
    color: var(--text-secondary);
}

/* === Trend Section === */
.trend-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 24px;
    margin: 0 auto;
}

.trend-card {
    background: var(--white);
    border: 1px solid #E5E7EB;
    border-radius: 16px;
    padding: 32px;
    transition: all 0.3s ease;
}

.trend-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.trend-icon {
    font-size: 40px;
    margin-bottom: 20px;
}

.trend-icon .iconfont {
    font-size: 40px;
    color: var(--primary);
}

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

.trend-card>p {
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.trend-list {
    margin-top: 16px;
}

.trend-list li {
    padding: 10px 0;
    font-size: 15px;
    color: #4B5563;
    border-bottom: 1px dashed #E5E7EB;
    position: relative;
    padding-left: 24px;
}

.trend-list li::before {
    content: '"';
    position: absolute;
    left: 0;
    color: var(--primary);
    font-size: 20px;
    font-weight: 700;
}

.trend-card-warning {
    background: linear-gradient(135deg, #FFF7ED 0%, #FFEDD5 100%);
    border-color: rgba(255, 102, 0, 0.2);
}

.trend-highlight {
    margin-top: 20px;
    font-size: 18px;
    color: var(--text-dark);
    font-weight: 600;
}

.trend-highlight span {
    color: var(--primary);
    font-size: 24px;
    font-weight: 800;
}

/* === Pain Section === */
.section-pain {
    background: var(--white) !important;
}

.pain-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
    margin-bottom: 48px;
}

.pain-card {
    background: var(--light-bg);
    border: 1px solid #E5E7EB;
    border-radius: 12px;
    padding: 24px 20px;
    text-align: center;
    transition: all 0.3s ease;
}

.pain-card:hover {
    border-color: var(--primary);
    background: #FFF7ED;
}

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

.pain-icon .iconfont {
    font-size: 36px;
    color: var(--primary);
}

.pain-card p {
    font-size: 14px;
    color: #4B5563;
    line-height: 1.6;
}

.pain-solution {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: linear-gradient(135deg, var(--dark-bg), #1A1F2E);
    border-radius: 16px;
    padding: 40px 48px;
}

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

.solution-content p {
    font-size: 16px;
    color: var(--text-secondary);
}

/* === GEO Compare Section === */
.geo-compare {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    margin-bottom: 48px;
}

.geo-item {
    flex: 1;
    padding: 32px;
    border-radius: 16px;
    background: var(--light-bg);
    border: 2px solid #E5E7EB;
}

.geo-old {
    opacity: 0.7;
}

.geo-new {
    background: linear-gradient(135deg, #FFF7ED 0%, #FFEDD5 100%);
    border-color: var(--primary);
    box-shadow: 0 8px 30px rgba(255, 102, 0, 0.15);
}

.geo-label {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.geo-new .geo-label {
    color: var(--primary);
}

.geo-flow {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-wrap: wrap;
}

.geo-step {
    padding: 8px 14px;
    background: var(--white);
    border-radius: 8px;
    font-size: 14px;
    color: var(--text-dark);
}

.geo-new .geo-step {
    background: var(--white);
}

.geo-step.highlight {
    background: var(--primary);
    color: var(--white);
    font-weight: 600;
}

.geo-arrow {
    color: var(--primary);
    font-weight: 700;
    font-size: 18px;
}

.geo-vs {
    font-size: 24px;
    font-weight: 900;
    color: var(--text-secondary);
    padding: 16px;
}

.geo-summary {
    text-align: center;
    font-size: 18px;
    color: var(--text-dark);
    margin: 0 auto;
}

.geo-summary strong {
    color: var(--primary);
    font-weight: 700;
}

/* === Flow Section === */
.flow-timeline {
    position: relative;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.flow-line {
    position: absolute;
    top: 40px;
    left: 10%;
    right: 10%;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--primary-light));
    border-radius: 2px;
}

.flow-step {
    position: relative;
    text-align: center;
}

.flow-num {
    width: 80px;
    height: 80px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 700;
    color: var(--white);
    position: relative;
    z-index: 1;
    box-shadow: 0 8px 25px var(--primary-glow);
}

.flow-card {
    background: var(--white);
    border: 1px solid #E5E7EB;
    border-radius: 12px;
    padding: 24px 20px;
    transition: all 0.3s ease;
}

.flow-card:hover {
    border-color: var(--primary);
    box-shadow: 0 8px 30px rgba(255, 102, 0, 0.1);
}

.flow-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.flow-card p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
}

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

.feature-card {
    display: flex;
    gap: 20px;
    background: var(--white);
    border: 1px solid #E5E7EB;
    border-radius: 16px;
    padding: 28px;
    transition: all 0.3s ease;
}

.feature-card:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(255, 102, 0, 0.1);
}

.feature-icon {
    font-size: 36px;
    flex-shrink: 0;
}

.feature-icon .iconfont {
    font-size: 40px;
    color: var(--primary);
}

.feature-content h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.feature-badge {
    display: inline-block;
    vertical-align: middle;
    margin-left: 8px;
    padding: 2px 10px;
    font-size: 12px;
    font-weight: 600;
    line-height: 1.5;
    color: var(--primary);
    background: rgba(255, 102, 0, 0.1);
    border-radius: 20px;
}

.feature-content p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* === Compare Table Section === */
.compare-table-wrap {
    overflow-x: auto;
    border-radius: 16px;
    border: 1px solid #E5E7EB;
}

.compare-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 15px;
}

.compare-table th,
.compare-table td {
    padding: 18px 24px;
    text-align: left;
    border-bottom: 1px solid #E5E7EB;
}

.compare-table thead th {
    background: var(--dark-bg);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 14px;
}

.compare-table thead th.highlight-col {
    background: var(--primary);
    position: relative;
}

.col-badge {
    position: absolute;
    right: 16px;
    background: var(--white);
    color: var(--primary);
    font-size: 12px;
    padding: 4px 12px;
    border-radius: 20px;
    font-weight: 700;
}

.compare-table td.highlight-col {
    background: #FFF7ED;
}

.compare-table tbody tr:hover {
    background: var(--light-bg);
}

.compare-table .check {
    color: var(--success);
    font-weight: 700;
    margin-right: 8px;
}

.compare-table .cross {
    color: var(--danger);
    font-weight: 700;
    margin-right: 8px;
    opacity: 0.6;
}

/* === Pricing Section === */
.section-pricing {
    background: var(--light-bg) !important;
}

.pricing-cards {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
    max-width: 1120px;
    margin: 0 auto;
    align-items: stretch;
}

.pricing-card {
    display: flex;
    flex-direction: column;
    min-width: 0;
    padding: 42px 26px 28px;
    position: relative;
    overflow: visible;
    text-align: center;
    background: var(--white);
    border: 2px solid #E5E7EB;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(31, 35, 40, 0.06);
    transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.pricing-card:hover,
.pricing-card:focus-within {
    z-index: 2;
    transform: translateY(-6px);
    border-color: rgba(255, 102, 0, 0.5);
    box-shadow: 0 18px 44px rgba(255, 102, 0, 0.14);
}

.pricing-card-recommended {
    border-color: var(--primary);
    background: linear-gradient(180deg, #FFF9F3 0%, var(--white) 28%);
    box-shadow: 0 16px 46px rgba(255, 102, 0, 0.2);
}

.pricing-card-recommended::after {
    content: "";
    position: absolute;
    inset: 10px;
    z-index: -1;
    border: 1px solid rgba(255, 102, 0, 0.12);
    border-radius: 14px;
    pointer-events: none;
}

.pricing-badge {
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    padding: 8px 24px;
    color: var(--primary);
    background: var(--white);
    border: 1.5px solid var(--primary);
    border-radius: 50px;
    box-shadow: 0 6px 18px rgba(255, 102, 0, 0.12);
    font-size: 14px;
    font-weight: 700;
    white-space: nowrap;
}

.pricing-card-recommended .pricing-badge {
    color: var(--white);
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    box-shadow: 0 8px 24px var(--primary-glow);
}

.pricing-header h3 {
    margin-bottom: 8px;
    color: var(--text-dark);
    font-size: 26px;
    font-weight: 800;
}

.pricing-header p {
    min-height: 22px;
    margin-bottom: 24px;
    color: var(--text-secondary);
    font-size: 14px;
}

.pricing-price {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    justify-content: center;
    gap: 4px 8px;
    margin-bottom: 26px;
}

.price-symbol {
    color: var(--primary);
    font-size: 24px;
    font-weight: 700;
}

.price-num {
    color: var(--primary);
    font-size: clamp(44px, 4vw, 56px);
    font-weight: 800;
    line-height: 1;
    letter-spacing: -1.5px;
}

.price-unit {
    flex-basis: 100%;
    margin-top: 10px;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 600;
}

.pricing-features {
    flex: 1;
    margin-bottom: 26px;
    text-align: left;
}

.pricing-features li {
    position: relative;
    padding: 12px 0 12px 28px;
    border-bottom: 1px solid #F3F4F6;
    color: #4B5563;
    font-size: 14px;
    line-height: 1.65;
}

.pricing-features li.yes::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: 700;
}

.feature-tip-wrap {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.feature-tip-trigger {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    padding: 0;
    color: var(--primary-dark);
    background: rgba(255, 102, 0, 0.14);
    border: 0;
    border-radius: 50%;
    font-size: 12px;
    font-weight: 700;
    line-height: 1;
    cursor: pointer;
    transition: background 0.2s ease, color 0.2s ease;
}

.feature-tip-trigger:hover,
.feature-tip-trigger:focus-visible,
.feature-tip-wrap.is-open .feature-tip-trigger {
    color: var(--white);
    background: var(--primary);
    outline: none;
}

.feature-tip-popover {
    position: absolute;
    left: 0;
    bottom: calc(100% + 10px);
    z-index: 9999;
    width: min(280px, calc(100vw - 48px));
    padding: 12px 14px;
    color: var(--white);
    background: rgba(24, 24, 27, 0.96);
    border-radius: 12px;
    box-shadow: 0 -8px 32px rgba(0, 0, 0, 0.2);
    font-size: 13px;
    line-height: 1.65;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s ease;
}

.feature-tip-popover::before {
    content: "";
    position: absolute;
    bottom: -6px;
    left: 18px;
    width: 12px;
    height: 12px;
    background: rgba(24, 24, 27, 0.96);
    transform: rotate(45deg);
}

.feature-tip-wrap:hover .feature-tip-popover,
.feature-tip-wrap:focus-within .feature-tip-popover,
.feature-tip-wrap.is-open .feature-tip-popover {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

@media (max-width: 992px) {
    .pricing-cards {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        max-width: 760px;
    }
}

@media (max-width: 768px) {
    .pricing-cards {
        grid-template-columns: 1fr;
        max-width: 440px;
    }

    .feature-tip-popover {
        left: -8px;
    }

    .feature-tip-popover::before {
        left: 26px;
    }
}

/* === FAQ Section === */
.faq-list {
    margin: 0 auto;
}

.faq-item {
    background: var(--white);
    border: 1px solid #E5E7EB;
    border-radius: 12px;
    margin-bottom: 12px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item:hover {
    border-color: var(--primary);
}

.faq-q {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px 24px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    cursor: pointer;
    position: relative;
    padding-right: 50px;
}

.faq-q::after {
    content: "+";
    position: absolute;
    right: 24px;
    font-size: 24px;
    color: var(--primary);
    transition: transform 0.3s ease;
}

.faq-item.active .faq-q::after {
    transform: rotate(45deg);
}

.faq-icon {
    width: 28px;
    height: 28px;
    background: var(--primary);
    color: var(--white);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    flex-shrink: 0;
}

.faq-a {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.8;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.3s ease;
    padding: 0 24px 0 68px;
}

.faq-item.active .faq-a {
    max-height: 600px;
    padding-bottom: 20px;
}

.faq-a p {
    margin: 0 0 10px;
}

.faq-a p:last-child {
    margin-bottom: 0;
}

/* 答案内标签云（平台名单瘦身） */
.faq-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin: 4px 0 12px;
}

.faq-chips:last-child {
    margin-bottom: 0;
}

.faq-chip {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    font-size: 13px;
    font-weight: 500;
    line-height: 1.4;
    color: var(--primary);
    background: rgba(255, 102, 0, 0.08);
    border: 1px solid rgba(255, 102, 0, 0.18);
    border-radius: 20px;
    white-space: nowrap;
    transition: all 0.2s ease;
}

.faq-chip:hover {
    background: rgba(255, 102, 0, 0.16);
    border-color: var(--primary);
}

/* FAQ 分类选项卡 */
.faq-tabs-wrap {
    text-align: center;
    margin-bottom: 32px;
}

.faq-tabs {
    display: inline-flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px;
    padding: 6px;
    background: var(--white);
    border: 1px solid #E5E7EB;
    border-radius: 50px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.faq-tab {
    display: inline-flex;
    align-items: center;
    padding: 10px 26px;
    border: none;
    background: transparent;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

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

.faq-tab.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    box-shadow: 0 6px 20px var(--primary-glow);
}

/* FAQ 分组面板切换 */
.faq-pane {
    display: none;
}

.faq-pane.active {
    display: block;
    animation: faqPaneFade 0.4s ease;
}

@keyframes faqPaneFade {
    from {
        opacity: 0;
        transform: translateY(8px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* === CTA Section === */
.section-cta {
    background: linear-gradient(135deg, var(--dark-bg), #1A1F2E) !important;
    padding: 100px 0;
}

.cta-content {
    text-align: center;
    max-width: 960px;
    margin: 0 auto;
}

.cta-title {
    font-size: 36px;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.cta-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.cta-badges {
    display: flex;
    justify-content: center;
    gap: 24px;
    flex-wrap: wrap;
    font-size: 15px;
    color: var(--text-secondary);
    margin-bottom: 40px;
}


/* === Footer === */
.footer {
    background: var(--dark-bg);
    color: var(--text-secondary);
    padding: 48px 0 24px;
    font-size: 14px;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 32px;
    padding-bottom: 32px;
}

.footer-brand .logo {
    margin-bottom: 8px;
}

.footer-brand p {
    font-size: 13px;
    color: var(--text-secondary);
}

.footer-links {
    display: flex;
    gap: 24px;
}

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

.footer-bottom {
    text-align: left;
    color: var(--text-secondary);
    font-size: 13px;
    line-height: 1.8;
}

.footer-bottom a {
    color: var(--text-secondary);
}

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

/* === Responsive === */
@media (max-width: 1024px) {
    .nav-toggle {
        display: flex;
    }

    /* 移动端：导航折叠为下拉面板，由汉堡按钮控制 */
    .nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: rgba(13, 17, 23, 0.98);
        backdrop-filter: blur(10px);
        border-bottom: 1px solid var(--dark-border);
        padding: 8px 16px 16px;
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        visibility: hidden;
        transition: max-height 0.3s ease, opacity 0.3s ease, visibility 0.3s;
    }

    .nav.is-open {
        max-height: calc(100vh - 70px);
        overflow-y: auto;
        opacity: 1;
        visibility: visible;
    }

    .nav>a {
        padding: 14px 4px;
        font-size: 16px;
        border-bottom: 1px solid var(--dark-border);
    }

    .hero-title {
        font-size: 42px;
    }

    .hero-stats {
        gap: 24px;
        padding: 24px 32px;
    }

    .stat-num {
        font-size: 26px;
    }

    .geo-compare {
        flex-direction: column;
    }

    .geo-item {
        max-width: 100%;
    }

    .geo-vs {
        padding: 8px;
    }
}

@media (max-width: 768px) {
    .header-inner {
        padding: 0 16px;
    }

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

    .hero-title {
        font-size: 32px;
    }

    .hero-desc {
        font-size: 16px;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: 20px;
    }

    .stat-divider {
        display: none;
    }

    .stat-item {
        width: 45%;
    }

    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 28px;
    }

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

    .pain-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .flow-timeline {
        grid-template-columns: repeat(2, 1fr);
    }

    .flow-line {
        display: none;
    }

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

    .feature-card {
        flex-direction: column;
        text-align: center;
    }

    .cta-title {
        font-size: 28px;
    }

    .footer-inner {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .faq-tabs {
        gap: 4px;
        padding: 5px;
    }

    .faq-tab {
        padding: 8px 16px;
        font-size: 14px;
    }

    .faq-q {
        font-size: 15px;
        padding: 16px 44px 16px 18px;
        gap: 12px;
    }

    .faq-q::after {
        right: 18px;
    }

    .faq-a {
        padding-left: 52px;
        padding-right: 18px;
    }

    .faq-item.active .faq-a {
        max-height: 800px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 26px;
    }

    .hero-badge {
        font-size: 12px;
        padding: 6px 14px;
    }

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }

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

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

    .pain-solution {
        flex-direction: column;
        text-align: center;
        gap: 20px;
        padding: 32px 24px;
    }

    .flow-timeline {
        grid-template-columns: 1fr;
    }

    .cta-badges {
        flex-direction: column;
        gap: 8px;
    }

}

/* 海外版徽标条（功能区/FAQ 复用的小标识） */
.intl-platforms {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 12px;
    margin: 8px auto 0;
}

.intl-platform-chip {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    background: var(--white);
    border: 1px solid #E5E7EB;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-dark);
    transition: all 0.3s ease;
}

.intl-platform-chip:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

.intl-platform-chip .iconfont {
    color: var(--primary);
    font-size: 16px;
}