:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #60a5fa;
    --primary-bg: #eff6ff;
    --text-1: #0f172a;
    --text-2: #334155;
    --text-3: #64748b;
    --text-4: #94a3b8;
    --bg-1: #ffffff;
    --bg-2: #f8fafc;
    --bg-3: #f1f5f9;
    --border: #e2e8f0;
    --border-light: #eef2f7;
    --success: #16a34a;
    --warning: #d97706;
    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 18px;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
    --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 24px 60px rgba(15, 23, 42, 0.12);
    --container: 1360px;
    --header-height: 72px;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    padding-top: var(--header-height);
    color: var(--text-1);
    background: var(--bg-1);
    font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
}

h1, h2, h3, h4, h5, h6 {
    margin: 0;
    color: var(--text-1);
    line-height: 1.35;
    font-weight: 700;
    letter-spacing: -0.01em;
}

p {
    margin: 0;
}

ul, ol {
    margin: 0;
    padding: 0;
    list-style: none;
}

a {
    color: inherit;
    text-decoration: none;
}

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

svg {
    display: block;
}

button {
    font: inherit;
    color: inherit;
    background: none;
    border: 0;
    padding: 0;
    cursor: pointer;
}

::selection {
    background: rgba(37, 99, 235, 0.18);
}

[hidden] {
    display: none !important;
}

.container {
    width: 100%;
    max-width: var(--container);
    margin: 0 auto;
    padding: 0 28px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 44px;
    padding: 0 22px;
    border-radius: 10px;
    border: 1px solid transparent;
    font-size: 15px;
    font-weight: 600;
    line-height: 1;
    white-space: nowrap;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn:hover {
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary {
    color: #fff;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    box-shadow: 0 8px 20px rgba(37, 99, 235, 0.28);
}

.btn-primary:hover {
    box-shadow: 0 12px 26px rgba(37, 99, 235, 0.34);
}

.btn-outline {
    color: var(--primary);
    background: #fff;
    border-color: rgba(37, 99, 235, 0.35);
}

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

.btn-ghost {
    color: var(--text-2);
    background: transparent;
}

.btn-ghost:hover {
    color: var(--primary);
    background: var(--primary-bg);
}

.btn-lg {
    height: 52px;
    padding: 0 30px;
    font-size: 16px;
    border-radius: 12px;
}

.section {
    padding: 96px 0;
}

.section-header {
    max-width: 720px;
    margin: 0 auto 56px;
    text-align: center;
}

.section-tag {
    display: inline-flex;
    align-items: center;
    height: 30px;
    padding: 0 14px;
    margin-bottom: 18px;
    border-radius: 999px;
    color: var(--primary);
    background: var(--primary-bg);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.04em;
}

.section-title {
    font-size: clamp(26px, 3.2vw, 38px);
}

.section-desc {
    margin-top: 14px;
    color: var(--text-3);
    font-size: 16px;
}

.highlight {
    color: var(--primary);
}

/* 顶部导航 */
.site-header {
    position: fixed;
    inset: 0 0 auto;
    z-index: 90;
    height: var(--header-height);
    background: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid transparent;
    backdrop-filter: saturate(180%) blur(14px);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.site-header.scrolled {
    border-bottom-color: var(--border-light);
    box-shadow: 0 6px 24px rgba(15, 23, 42, 0.06);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: flex-start;
    height: 100%;
    gap: 28px;
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex: 0 0 auto;
}

.logo-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    padding: 6px;
    border-radius: 10px;
    background: var(--bg-2);
}

.logo-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.logo-text {
    display: inline-flex;
    align-items: baseline;
    gap: 2px;
    font-size: 20px;
    font-weight: 800;
    letter-spacing: 0.02em;
    color: var(--text-1);
}

.logo-sub {
    font-size: 13px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: 0.02em;
}

.main-nav ul {
    display: flex;
    align-items: center;
    gap: 6px;
}

.main-nav a {
    display: inline-flex;
    align-items: center;
    height: 38px;
    padding: 0 14px;
    border-radius: 8px;
    color: var(--text-2);
    font-size: 15px;
    font-weight: 500;
    transition: color 0.15s ease, background-color 0.15s ease;
}

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

.nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex: 0 0 auto;
    margin-left: auto;
}

.menu-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border-radius: 10px;
    border: 1px solid var(--border);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
}

.menu-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    border-radius: 2px;
    background: var(--text-1);
    transition: transform 0.2s ease, opacity 0.2s ease;
}

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

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

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

.mobile-mask {
    display: none;
    position: fixed;
    inset: var(--header-height) 0 0;
    z-index: 80;
    background: rgba(15, 23, 42, 0.36);
}

/* 首页 Hero */
.hero {
    position: relative;
    overflow: hidden;
    padding: 84px 0 96px;
    background:
        radial-gradient(900px 420px at 12% -10%, rgba(37, 99, 235, 0.14), transparent 62%),
        radial-gradient(700px 360px at 92% 8%, rgba(96, 165, 250, 0.16), transparent 66%),
        linear-gradient(180deg, #f6f9ff 0%, #ffffff 78%);
}

.hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image: radial-gradient(rgba(37, 99, 235, 0.09) 1px, transparent 1px);
    background-size: 26px 26px;
    mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.5), transparent 72%);
    pointer-events: none;
}

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

.hero-inner {
    display: grid;
    grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
    align-items: center;
    gap: 64px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    height: 34px;
    padding: 0 14px;
    border-radius: 999px;
    border: 1px solid rgba(37, 99, 235, 0.18);
    background: rgba(255, 255, 255, 0.8);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
}

.hero-badge-dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.14);
}

.hero h1 {
    margin-top: 22px;
    font-size: clamp(34px, 4.6vw, 54px);
    line-height: 1.18;
    letter-spacing: -0.02em;
}

.hero-text {
    max-width: 580px;
}

.hero-desc {
    max-width: 560px;
    margin-top: 22px;
    color: var(--text-3);
    font-size: 17px;
    line-height: 1.85;
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 32px;
}

.hero-stats {
    display: flex;
    gap: 44px;
    margin-top: 44px;
    padding-top: 30px;
    border-top: 1px solid var(--border-light);
}

.hero-stat-num {
    font-size: 30px;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.hero-stat-num .unit,
.stat-item-num .unit,
.about-stat-num .unit {
    font-size: 0.55em;
    font-weight: 700;
    color: var(--primary);
}

.hero-stat-label {
    margin-top: 6px;
    color: var(--text-4);
    font-size: 13px;
}

.hero-visual {
    display: flex;
    justify-content: flex-end;
}

.hero-card {
    width: 100%;
    max-width: 460px;
    padding: 24px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(226, 232, 240, 0.9);
    background: rgba(255, 255, 255, 0.88);
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(8px);
}

.hero-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 18px;
}

.hero-card-title {
    font-size: 15px;
    font-weight: 700;
}

.hero-card-badge {
    display: inline-flex;
    align-items: center;
    height: 24px;
    padding: 0 10px;
    border-radius: 999px;
    color: var(--success);
    background: #ecfdf3;
    font-size: 12px;
    font-weight: 600;
}

.hero-card-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 0;
    border-top: 1px solid var(--border-light);
}

.hero-card-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    flex: 0 0 auto;
    border-radius: 10px;
    color: var(--primary);
    background: var(--primary-bg);
}

.hero-card-icon svg {
    width: 20px;
    height: 20px;
}

.hero-card-item-info {
    min-width: 0;
    flex: 1;
}

.hero-card-item-name {
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.hero-card-item-desc {
    margin-top: 2px;
    color: var(--text-4);
    font-size: 12px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.hero-card-item-status {
    flex: 0 0 auto;
    padding: 4px 10px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
}

.status-success {
    color: var(--success);
    background: #ecfdf3;
}

.status-warning {
    color: var(--warning);
    background: #fffbeb;
}

.status-pending {
    color: var(--text-4);
    background: var(--bg-3);
}

/* 功能卡片 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
}

.feature-card {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    column-gap: 14px;
    padding: 30px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    background: var(--bg-1);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: rgba(37, 99, 235, 0.22);
    box-shadow: var(--shadow);
}

.feature-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    width: 50px;
    height: 50px;
    border-radius: 14px;
    color: var(--primary);
    background: var(--primary-bg);
}

.feature-icon svg {
    width: 24px;
    height: 24px;
}

.feature-card h3 {
    font-size: 19px;
}

.feature-card > p {
    flex: 0 0 100%;
    margin-top: 12px;
    color: var(--text-3);
    font-size: 14px;
    line-height: 1.8;
}

.feature-card ul {
    display: grid;
    flex: 0 0 100%;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px 12px;
    margin-top: 18px;
    padding-top: 18px;
    border-top: 1px solid var(--border-light);
}

.feature-card li {
    position: relative;
    padding-left: 16px;
    color: var(--text-2);
    font-size: 13px;
}

.feature-card li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 9px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary-light);
}

/* 平台集成 */
.platforms {
    background: var(--bg-2);
}

.platforms-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
}

.platform-card {
    padding: 28px 24px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    background: var(--bg-1);
    text-align: center;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.platform-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.platform-logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    margin-bottom: 16px;
    border-radius: 14px;
    font-size: 18px;
    font-weight: 800;
}

.platform-logo.meituan {
    color: #b45309;
    background: #fff7e6;
}

.platform-logo.sftc {
    color: #b91c1c;
    background: #ffebe8;
}

.platform-logo.eleme {
    color: #0369a1;
    background: #e6f7ff;
}

.platform-logo.dada {
    color: #1d4ed8;
    background: #eef2ff;
}

.platform-card h4 {
    font-size: 16px;
}

.platform-card p {
    margin-top: 8px;
    color: var(--text-3);
    font-size: 13px;
    line-height: 1.7;
}

/* 适用场景 */
.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
}

.scenario-card {
    position: relative;
    padding: 28px 24px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    background: var(--bg-1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.scenario-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.scenario-card.pending {
    background: var(--bg-2);
}

.scenario-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    margin-bottom: 18px;
    border-radius: 14px;
    color: var(--primary);
    background: var(--primary-bg);
}

.scenario-icon svg {
    width: 23px;
    height: 23px;
}

.scenario-card.pending .scenario-icon {
    color: var(--text-4);
    background: var(--bg-3);
}

.scenario-card h4 {
    font-size: 17px;
}

.scenario-card p {
    margin-top: 8px;
    color: var(--text-3);
    font-size: 13px;
    line-height: 1.7;
}

.scenario-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    padding: 3px 10px;
    border-radius: 999px;
    color: var(--success);
    background: #ecfdf3;
    font-size: 12px;
    font-weight: 600;
}

.scenario-card.pending .scenario-badge {
    color: var(--text-4);
    background: var(--bg-3);
}

/* 数据亮点 */
.stats {
    padding: 72px 0;
    color: #fff;
    background:
        radial-gradient(600px 260px at 10% 0%, rgba(96, 165, 250, 0.28), transparent 60%),
        linear-gradient(135deg, #0f2a6b 0%, #1e40af 58%, #2563eb 100%);
}

.stats-inner {
    display: block;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 24px;
    text-align: center;
}

.stat-item {
    min-width: 0;
}

.stat-item-num {
    color: #fff;
    font-size: 38px;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.stat-item-num .unit {
    color: #bfdbfe;
}

.stat-item-label {
    margin-top: 8px;
    color: rgba(255, 255, 255, 0.72);
    font-size: 14px;
}

/* 定价 */
.pricing-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    align-items: stretch;
}

.pricing-card {
    display: flex;
    flex-direction: column;
    padding: 32px 28px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    background: var(--bg-1);
    box-shadow: var(--shadow-sm);
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

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

.pricing-card.featured {
    border-color: var(--primary);
    box-shadow: 0 18px 44px rgba(37, 99, 235, 0.16);
    position: relative;
}

.pricing-card.featured::before {
    content: "推荐";
    position: absolute;
    top: 18px;
    right: 18px;
    padding: 3px 10px;
    border-radius: 999px;
    color: #fff;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    font-size: 12px;
    font-weight: 600;
}

.pricing-name {
    font-size: 20px;
    font-weight: 700;
}

.pricing-desc {
    margin-top: 8px;
    min-height: 42px;
    color: var(--text-3);
    font-size: 13px;
    line-height: 1.65;
}

.pricing-price {
    margin-top: 20px;
    padding-bottom: 22px;
    border-bottom: 1px solid var(--border-light);
}

.pricing-price-num {
    display: flex;
    align-items: baseline;
    gap: 4px;
    font-size: 38px;
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

.pricing-price-num .currency {
    font-size: 20px;
    font-weight: 700;
}

.pricing-price-num .period {
    font-size: 13px;
    font-weight: 500;
    color: var(--text-4);
}

.pricing-price-note {
    margin-top: 8px;
    color: var(--text-4);
    font-size: 12px;
}

.pricing-features {
    flex: 1;
    margin: 22px 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.pricing-features li {
    color: var(--text-2);
    font-size: 14px;
    line-height: 1.6;
}

.pricing-features .check {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    margin-right: 8px;
    border-radius: 50%;
    color: var(--primary);
    background: var(--primary-bg);
    font-size: 11px;
    font-weight: 700;
    vertical-align: 1px;
}

.pricing-btn {
    width: 100%;
}

.compare-section {
    overflow-x: auto;
}

.compare-table {
    width: 100%;
    min-width: 760px;
    border-collapse: collapse;
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--bg-1);
    box-shadow: var(--shadow-sm);
}

.compare-table th,
.compare-table td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--border-light);
    text-align: center;
    font-size: 14px;
}

.compare-table th {
    color: var(--text-1);
    background: var(--bg-2);
    font-weight: 700;
}

.compare-table th:first-child,
.compare-table td:first-child {
    text-align: left;
    color: var(--text-2);
    font-weight: 600;
    background: var(--bg-2);
}

.compare-table tbody tr:last-child td {
    border-bottom: 0;
}

.compare-table tbody tr:hover td {
    background: #f8fbff;
}

/* FAQ */
.faq-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

.faq-item {
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    background: var(--bg-1);
    overflow: hidden;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.faq-item.open {
    border-color: rgba(37, 99, 235, 0.3);
    box-shadow: var(--shadow-sm);
}

.faq-question {
    position: relative;
    padding: 20px 52px 20px 22px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
}

.faq-question::after {
    content: "";
    position: absolute;
    right: 22px;
    top: 50%;
    width: 9px;
    height: 9px;
    margin-top: -6px;
    border-right: 2px solid var(--text-4);
    border-bottom: 2px solid var(--text-4);
    transform: rotate(45deg);
    transition: transform 0.2s ease;
}

.faq-item.open .faq-question::after {
    transform: rotate(-135deg);
    margin-top: -2px;
}

.faq-answer {
    display: grid;
    grid-template-rows: 0fr;
    transition: grid-template-rows 0.25s ease;
}

.faq-item.open .faq-answer {
    grid-template-rows: 1fr;
}

.faq-answer-inner {
    overflow: hidden;
    color: var(--text-3);
    font-size: 14px;
    line-height: 1.8;
}

.faq-item.open .faq-answer-inner {
    padding: 0 22px 20px;
}

/* CTA */
.cta-section {
    padding: 84px 0;
    color: #fff;
    background:
        radial-gradient(500px 220px at 88% 0%, rgba(147, 197, 253, 0.34), transparent 62%),
        linear-gradient(135deg, #1e3a8a 0%, #1d4ed8 55%, #2563eb 100%);
}

.cta-inner {
    text-align: center;
}

.cta-title {
    color: #fff;
    font-size: clamp(26px, 3.2vw, 38px);
}

.cta-desc {
    margin-top: 14px;
    color: rgba(255, 255, 255, 0.78);
    font-size: 16px;
}

.cta-actions {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px;
    margin-top: 30px;
}

.cta-section .btn-primary {
    color: var(--primary-dark);
    background: #fff;
    box-shadow: 0 12px 30px rgba(2, 6, 23, 0.2);
}

.cta-section .btn-outline {
    color: #fff;
    background: transparent;
    border-color: rgba(255, 255, 255, 0.55);
}

.cta-section .btn-outline:hover {
    background: rgba(255, 255, 255, 0.12);
}

/* 内页 Hero */
.page-hero {
    padding: 78px 0 56px;
    background:
        radial-gradient(700px 320px at 20% -20%, rgba(37, 99, 235, 0.14), transparent 64%),
        linear-gradient(180deg, #f6f9ff 0%, #ffffff 100%);
    border-bottom: 1px solid var(--border-light);
}

.page-hero-inner {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.page-hero-tag {
    display: inline-flex;
    align-items: center;
    height: 30px;
    padding: 0 14px;
    margin-bottom: 18px;
    border-radius: 999px;
    color: var(--primary);
    background: var(--primary-bg);
    font-size: 13px;
    font-weight: 600;
}

.page-hero h1 {
    font-size: clamp(30px, 3.8vw, 44px);
    line-height: 1.24;
}

.page-hero p {
    margin-top: 18px;
    color: var(--text-3);
    font-size: 16px;
    line-height: 1.8;
}

/* 功能详情 */
.feature-detail {
    padding: 96px 0;
}

.feature-detail-row {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    align-items: center;
    gap: 72px;
    padding: 56px 0;
    border-bottom: 1px solid var(--border-light);
}

.feature-detail-row:first-child {
    padding-top: 0;
}

.feature-detail-row:last-child {
    padding-bottom: 0;
    border-bottom: 0;
}

.feature-detail-row.reverse .feature-detail-text {
    order: 2;
}

.feature-detail-row.reverse .feature-detail-visual {
    order: 1;
}

.feature-detail-tag {
    display: inline-flex;
    align-items: center;
    height: 28px;
    padding: 0 12px;
    margin-bottom: 16px;
    border-radius: 999px;
    color: var(--primary);
    background: var(--primary-bg);
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.feature-detail-text h2 {
    font-size: clamp(24px, 2.8vw, 32px);
    line-height: 1.35;
}

.feature-detail-text > p {
    margin-top: 16px;
    color: var(--text-3);
    font-size: 15px;
    line-height: 1.9;
}

.feature-detail-list {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px 18px;
    margin-top: 26px;
}

.feature-detail-list li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    color: var(--text-2);
    font-size: 14px;
}

.feature-detail-list .check {
    flex: 0 0 auto;
    width: 18px;
    height: 18px;
    margin-top: 3px;
    border-radius: 50%;
    color: var(--primary);
    background: var(--primary-bg);
    font-size: 11px;
    font-weight: 700;
    text-align: center;
    line-height: 18px;
}

.visual-mock {
    padding: 20px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    background: linear-gradient(180deg, #ffffff, #f8fafc);
    box-shadow: var(--shadow);
}

.visual-mock-header {
    display: flex;
    gap: 6px;
    margin-bottom: 18px;
}

.visual-mock-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: var(--border);
}

.visual-mock-dot:nth-child(1) {
    background: #fca5a5;
}

.visual-mock-dot:nth-child(2) {
    background: #fcd34d;
}

.visual-mock-dot:nth-child(3) {
    background: #86efac;
}

.visual-mock-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 16px;
}

.visual-mock-bar-item {
    height: 8px;
    flex: 1;
    border-radius: 999px;
    background: var(--bg-3);
}

.visual-mock-bar-item:first-child {
    background: rgba(37, 99, 235, 0.22);
}

.visual-mock-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 13px 4px;
    border-top: 1px solid var(--border-light);
}

.visual-mock-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    flex: 0 0 auto;
    border-radius: 10px;
    color: var(--primary);
    background: var(--primary-bg);
}

.visual-mock-icon svg {
    width: 18px;
    height: 18px;
}

.visual-mock-text {
    min-width: 0;
    flex: 1;
}

.visual-mock-text-name {
    font-size: 13px;
    font-weight: 600;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.visual-mock-text-desc {
    margin-top: 2px;
    color: var(--text-4);
    font-size: 12px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.visual-mock-status {
    flex: 0 0 auto;
    padding: 3px 10px;
    border-radius: 999px;
    color: var(--success);
    background: #ecfdf3;
    font-size: 12px;
    font-weight: 600;
}

/* 技术架构 */
.tech-arch {
    background: var(--bg-2);
}

.arch-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 24px;
}

.arch-card {
    padding: 30px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    border-top: 3px solid var(--primary);
    background: var(--bg-1);
}

.arch-card h4 {
    font-size: 18px;
}

.arch-card p {
    margin-top: 10px;
    color: var(--text-3);
    font-size: 14px;
    line-height: 1.8;
}

.arch-card ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-top: 18px;
    padding-top: 18px;
    border-top: 1px solid var(--border-light);
}

.arch-card li {
    position: relative;
    padding-left: 16px;
    color: var(--text-2);
    font-size: 13px;
}

.arch-card li::before {
    content: "";
    position: absolute;
    left: 0;
    top: 9px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--primary-light);
}

/* 关于我们 */
.about-intro {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
    align-items: center;
    gap: 64px;
}

.about-intro-text h2 {
    font-size: clamp(26px, 3vw, 34px);
}

.about-intro-text p {
    margin-top: 16px;
    color: var(--text-3);
    font-size: 15px;
    line-height: 1.95;
}

.about-intro-visual {
    display: flex;
    justify-content: center;
}

.about-stat-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
    width: 100%;
}

.about-stat-item {
    padding: 28px 22px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    background: linear-gradient(180deg, #ffffff, #f8fafc);
    text-align: center;
}

.about-stat-num {
    font-size: 32px;
    font-weight: 800;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

.about-stat-label {
    margin-top: 6px;
    color: var(--text-4);
    font-size: 13px;
}

.timeline {
    position: relative;
    max-width: 820px;
    margin: 0 auto;
    padding-left: 28px;
}

.timeline::before {
    content: "";
    position: absolute;
    left: 6px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: var(--border);
}

.timeline-item {
    position: relative;
    padding: 0 0 34px 28px;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: -28px;
    top: 6px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 3px solid #bfdbfe;
    background: var(--primary);
}

.timeline-year {
    color: var(--primary);
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0.04em;
}

.timeline-title {
    margin-top: 6px;
    font-size: 18px;
}

.timeline-desc {
    margin-top: 8px;
    color: var(--text-3);
    font-size: 14px;
    line-height: 1.8;
}

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

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 20px;
}

.advantage-card {
    padding: 28px 24px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    background: var(--bg-1);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.advantage-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow);
}

.advantage-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 46px;
    height: 46px;
    margin-bottom: 16px;
    border-radius: 13px;
    color: var(--primary);
    background: var(--primary-bg);
}

.advantage-icon svg {
    width: 22px;
    height: 22px;
}

.advantage-card h4 {
    font-size: 17px;
}

.advantage-card p {
    margin-top: 8px;
    color: var(--text-3);
    font-size: 13px;
    line-height: 1.75;
}

/* 联系我们 */
.contact-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    gap: 28px;
    align-items: stretch;
}

.contact-info-list {
    display: grid;
    gap: 16px;
}

.contact-info-card {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 22px;
    border-radius: var(--radius);
    border: 1px solid var(--border-light);
    background: var(--bg-1);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.contact-info-card:hover {
    border-color: rgba(37, 99, 235, 0.24);
    box-shadow: var(--shadow-sm);
}

.contact-info-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    flex: 0 0 auto;
    border-radius: 12px;
    color: var(--primary);
    background: var(--primary-bg);
}

.contact-info-icon svg {
    width: 21px;
    height: 21px;
}

.contact-info-text h4 {
    font-size: 16px;
}

.contact-info-text p {
    margin-top: 4px;
    color: var(--text-2);
    font-size: 14px;
}

.contact-map {
    min-height: 100%;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-light);
    background:
        radial-gradient(360px 220px at 20% 20%, rgba(37, 99, 235, 0.18), transparent 62%),
        radial-gradient(420px 260px at 80% 80%, rgba(96, 165, 250, 0.22), transparent 66%),
        linear-gradient(135deg, #eef4ff 0%, #dbeafe 100%);
}

.contact-map-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    min-height: 360px;
    padding: 40px;
    text-align: center;
    color: var(--primary-dark);
}

.contact-map-placeholder svg {
    width: 54px;
    height: 54px;
    margin-bottom: 16px;
    opacity: 0.85;
}

.contact-map-placeholder p {
    font-size: 16px;
    font-weight: 600;
}

.contact-icon {
    width: 16px;
    height: 16px;
    flex: 0 0 auto;
}

/* 帮助中心 */
.help-hero {
    padding-bottom: 64px;
}

.help-search {
    display: flex;
    align-items: center;
    gap: 10px;
    max-width: 560px;
    margin: 28px auto 0;
    padding: 0 18px;
    height: 54px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: #fff;
    box-shadow: var(--shadow-sm);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.help-search:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.help-search svg {
    width: 20px;
    height: 20px;
    flex: 0 0 auto;
    color: var(--text-4);
}

.help-search input {
    flex: 1;
    min-width: 0;
    height: 100%;
    border: 0;
    outline: none;
    background: transparent;
    font-size: 15px;
    color: var(--text-1);
}

.help-search input::placeholder {
    color: var(--text-4);
}

.help-section {
    padding-top: 64px;
}

.help-groups {
    position: relative;
    min-height: 120px;
}

.help-filter {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 40px;
}

.help-filter-item {
    height: 38px;
    padding: 0 18px;
    border-radius: 999px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--text-2);
    font-size: 14px;
    font-weight: 500;
    transition: color 0.15s ease, border-color 0.15s ease, background-color 0.15s ease;
}

.help-filter-item:hover {
    color: var(--primary);
    border-color: rgba(37, 99, 235, 0.35);
}

.help-filter-item.active {
    color: #fff;
    border-color: var(--primary);
    background: var(--primary);
}

.help-group {
    margin-bottom: 44px;
}

.help-group:last-of-type {
    margin-bottom: 0;
}

.help-group-title {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 18px;
    font-size: 20px;
}

.help-group-title::before {
    content: "";
    width: 4px;
    height: 20px;
    border-radius: 999px;
    background: var(--primary);
}

.help-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 16px;
}

.help-card {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 22px;
    border-radius: var(--radius);
    border: 1px solid var(--border-light);
    background: var(--bg-1);
    transition: transform 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.help-card:hover {
    transform: translateY(-3px);
    border-color: rgba(37, 99, 235, 0.28);
    box-shadow: var(--shadow);
}

.help-card-tag {
    align-self: flex-start;
    padding: 3px 10px;
    border-radius: 999px;
    color: var(--primary);
    background: var(--primary-bg);
    font-size: 12px;
    font-weight: 600;
}

.help-card-body h3 {
    font-size: 16px;
    line-height: 1.5;
}

.help-card-body p {
    margin-top: 8px;
    color: var(--text-3);
    font-size: 13px;
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.help-card-meta {
    display: block;
    margin-top: 14px;
    color: var(--text-4);
    font-size: 12px;
}

.help-empty {
    padding: 64px 24px;
    border-radius: var(--radius);
    border: 1px dashed var(--border);
    text-align: center;
}

.help-empty p {
    margin-bottom: 18px;
    color: var(--text-3);
    font-size: 15px;
}

.help-support {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    margin-top: 56px;
    padding: 32px;
    border-radius: var(--radius-lg);
    border: 1px solid rgba(37, 99, 235, 0.18);
    background: linear-gradient(135deg, #f4f8ff, #ffffff);
}

.help-support h3 {
    font-size: 19px;
}

.help-support p {
    margin-top: 6px;
    color: var(--text-3);
    font-size: 14px;
}

.help-support-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.help-article-hero {
    text-align: left;
}

.help-article-hero .page-hero-inner {
    max-width: 860px;
    margin: 0;
    text-align: left;
}

.help-breadcrumb {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 8px;
    margin-bottom: 16px;
    color: var(--text-4);
    font-size: 13px;
}

.help-breadcrumb a {
    color: var(--text-3);
}

.help-breadcrumb a:hover {
    color: var(--primary);
}

.help-article-section {
    padding-top: 64px;
}

.help-article {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 300px;
    gap: 40px;
    align-items: start;
}

.help-article-main {
    padding: 36px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    background: var(--bg-1);
    box-shadow: var(--shadow-sm);
}

.help-article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    padding-bottom: 18px;
    margin-bottom: 22px;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-4);
    font-size: 13px;
}

.help-article-content {
    color: var(--text-2);
    font-size: 15px;
    line-height: 1.95;
    word-break: break-word;
}

.help-article-content h2 {
    margin: 32px 0 12px;
    padding-left: 12px;
    border-left: 4px solid var(--primary);
    font-size: 20px;
    line-height: 1.5;
}

.help-article-content h3 {
    margin: 26px 0 10px;
    font-size: 17px;
}

.help-article-content p {
    margin: 0 0 14px;
}

.help-article-content ul,
.help-article-content ol {
    margin: 0 0 16px;
    padding-left: 22px;
}

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

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

.help-article-content li {
    margin-bottom: 6px;
}

.help-article-content a {
    color: var(--primary);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.help-article-content table {
    width: 100%;
    margin: 0 0 18px;
    border-collapse: collapse;
    font-size: 14px;
}

.help-article-content th,
.help-article-content td {
    padding: 9px 12px;
    border: 1px solid var(--border);
    text-align: left;
}

.help-article-content th {
    background: var(--bg-2);
    font-weight: 600;
}

.help-article-content blockquote {
    margin: 0 0 16px;
    padding: 12px 16px;
    border-left: 4px solid var(--border);
    border-radius: 0 8px 8px 0;
    background: var(--bg-2);
    color: var(--text-3);
}

.help-article-content code {
    padding: 2px 6px;
    border-radius: 6px;
    background: var(--bg-3);
    color: #be123c;
    font-size: 0.92em;
}

.help-article-content img {
    border-radius: var(--radius);
    margin: 0 0 16px;
}

.help-article-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--border-light);
}

.help-article-aside {
    position: sticky;
    top: calc(var(--header-height) + 24px);
    padding: 24px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    background: var(--bg-2);
}

.help-article-aside h3 {
    font-size: 16px;
    margin-bottom: 14px;
}

.help-article-aside li + li {
    margin-top: 10px;
}

.help-article-aside a {
    color: var(--text-2);
    font-size: 14px;
    line-height: 1.6;
}

.help-article-aside a:hover {
    color: var(--primary);
}

/* 页脚 */
.site-footer {
    padding: 64px 0 28px;
    color: rgba(226, 232, 240, 0.78);
    background: #0b1220;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr repeat(3, 1fr);
    gap: 40px;
}

.footer-brand {
    min-width: 0;
}

.footer-logo .logo-text {
    color: #f8fafc;
}

.footer-logo .logo-icon {
    background: #fff;
}

.footer-desc {
    margin-top: 16px;
    color: rgba(226, 232, 240, 0.62);
    font-size: 13px;
    line-height: 1.8;
}

.footer-col h4 {
    margin-bottom: 16px;
    color: #f8fafc;
    font-size: 15px;
}

.footer-col li + li {
    margin-top: 10px;
}

.footer-col a,
.footer-col li {
    color: rgba(226, 232, 240, 0.68);
    font-size: 13px;
    line-height: 1.7;
}

.footer-col a:hover {
    color: #fff;
}

.footer-contact li {
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-bottom {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-top: 48px;
    padding-top: 22px;
    border-top: 1px solid rgba(148, 163, 184, 0.18);
    color: rgba(226, 232, 240, 0.5);
    font-size: 12px;
}

.footer-bottom a {
    color: rgba(226, 232, 240, 0.6);
}

.footer-bottom a:hover {
    color: #fff;
}

.footer-trust {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px 24px;
    margin-top: 40px;
    padding-top: 22px;
    border-top: 1px solid rgba(148, 163, 184, 0.18);
    color: rgba(226, 232, 240, 0.6);
    font-size: 13px;
}

.footer-trust a {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    color: rgba(226, 232, 240, 0.78);
}

.footer-trust a:hover {
    color: #fff;
}

.footer-trust + .footer-bottom {
    margin-top: 18px;
}

/* 入场动画 */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(18px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeUp 0.6s cubic-bezier(0.22, 0.61, 0.36, 1) both;
}

.delay-1 { animation-delay: 0.08s; }
.delay-2 { animation-delay: 0.16s; }
.delay-3 { animation-delay: 0.24s; }
.delay-4 { animation-delay: 0.32s; }
.delay-5 { animation-delay: 0.4s; }
.delay-6 { animation-delay: 0.48s; }

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .fade-in-up {
        animation: none;
    }

    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
    }
}

/* 响应式 */
@media (max-width: 1100px) {
    .hero-inner {
        gap: 40px;
    }

    .features-grid,
    .arch-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .platforms-grid,
    .scenarios-grid,
    .advantages-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .help-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .help-article {
        grid-template-columns: minmax(0, 1fr);
    }

    .help-article-aside {
        position: static;
    }
}

@media (max-width: 900px) {
    :root {
        --header-height: 64px;
    }

    .container {
        padding: 0 22px;
    }

    .section {
        padding: 72px 0;
    }

    .section-header {
        margin-bottom: 40px;
    }

    .main-nav {
        display: none;
        position: fixed;
        top: var(--header-height);
        left: 0;
        right: 0;
        z-index: 85;
        padding: 14px 22px 22px;
        background: #fff;
        border-bottom: 1px solid var(--border-light);
        box-shadow: 0 18px 32px rgba(15, 23, 42, 0.1);
    }

    .main-nav ul {
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
    }

    .main-nav a {
        justify-content: flex-start;
        height: 46px;
        padding: 0 14px;
        font-size: 16px;
    }

    .nav-open .main-nav {
        display: block;
    }

    .nav-open .mobile-mask {
        display: block;
    }

    .nav-open {
        overflow: hidden;
    }

    .nav-actions {
        display: none;
    }

    .menu-toggle {
        display: inline-flex;
    }

    .hero {
        padding: 56px 0 72px;
    }

    .hero-inner {
        grid-template-columns: minmax(0, 1fr);
        gap: 36px;
    }

    .hero-visual {
        justify-content: flex-start;
    }

    .hero-card {
        max-width: none;
    }

    .hero-stats {
        gap: 28px;
    }

    .feature-detail {
        padding: 72px 0;
    }

    .feature-detail-row,
    .feature-detail-row.reverse {
        grid-template-columns: minmax(0, 1fr);
        gap: 32px;
        padding: 40px 0;
    }

    .feature-detail-row.reverse .feature-detail-text,
    .feature-detail-row.reverse .feature-detail-visual {
        order: initial;
    }

    .about-intro {
        grid-template-columns: minmax(0, 1fr);
        gap: 36px;
    }

    .contact-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .contact-map {
        min-height: 300px;
    }

    .footer-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .help-support {
        flex-direction: column;
        align-items: flex-start;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 18px;
    }

    .section {
        padding: 56px 0;
    }

    .features-grid,
    .arch-grid,
    .platforms-grid,
    .scenarios-grid,
    .advantages-grid,
    .help-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .feature-card ul,
    .feature-detail-list {
        grid-template-columns: minmax(0, 1fr);
    }

    .stats-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
        gap: 28px 16px;
    }

    .stat-item-num {
        font-size: 30px;
    }

    .faq-grid {
        grid-template-columns: minmax(0, 1fr);
    }

    .hero-actions .btn,
    .cta-actions .btn {
        flex: 1 1 100%;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: 22px 32px;
    }

    .pricing-card {
        padding: 26px 22px;
    }

    .help-article-main {
        padding: 24px 20px;
    }

    .help-filter {
        margin-bottom: 28px;
    }

    .help-group {
        margin-bottom: 34px;
    }

    .help-card {
        padding: 18px;
    }

    .footer-grid {
        grid-template-columns: minmax(0, 1fr);
        gap: 28px;
    }

    .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
    }

    .page-hero {
        padding: 56px 0 42px;
    }

    .page-hero p {
        font-size: 15px;
    }
}

/* 官网精简版：首页与系统介绍 */
.hero-simple {
    padding: 96px 0 88px;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 82%);
}

.hero-simple::after {
    display: none;
}

.hero-simple .hero-text {
    max-width: 860px;
}

.hero-simple h1 {
    font-size: clamp(30px, 3.4vw, 46px);
}

.hero-contact {
    margin-top: 26px;
    color: var(--text-3);
    font-size: 15px;
}

.hero-contact a {
    color: var(--primary);
    font-weight: 600;
}

.flow-steps {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
}

.flow-step {
    padding: 26px 24px;
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    background: var(--bg-1);
}

.flow-step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--primary-bg);
    color: var(--primary);
    font-size: 14px;
    font-weight: 700;
}

.flow-step h3 {
    margin: 14px 0 8px;
    font-size: 17px;
}

.flow-step p {
    color: var(--text-3);
    font-size: 14px;
    line-height: 1.75;
}

.integration-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
}

.integration-group {
    padding: 30px;
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    background: var(--bg-1);
}

.integration-group h3 {
    font-size: 19px;
}

.integration-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 18px 0;
}

.integration-tag {
    display: inline-flex;
    align-items: center;
    height: 32px;
    padding: 0 14px;
    border-radius: 999px;
    border: 1px solid rgba(37, 99, 235, 0.16);
    background: var(--primary-bg);
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
}

.integration-group p {
    color: var(--text-3);
    font-size: 14px;
    line-height: 1.75;
}

.help-entry {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    padding: 36px 40px;
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    background: var(--bg-2);
}

.help-entry h2 {
    font-size: 24px;
}

.help-entry p {
    margin-top: 10px;
    color: var(--text-3);
    font-size: 15px;
    line-height: 1.7;
}

.help-entry-actions {
    display: flex;
    flex-shrink: 0;
    gap: 12px;
}

.module-list {
    max-width: 920px;
    margin: 0 auto;
}

.module-row {
    display: grid;
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 28px;
    padding: 40px 0;
    border-top: 1px solid var(--border-light);
}

.module-row:first-child {
    border-top: 0;
    padding-top: 0;
}

.module-index {
    color: var(--primary);
    font-size: 15px;
    font-weight: 700;
    letter-spacing: 0.08em;
}

.module-body h2 {
    font-size: 26px;
}

.module-body p {
    margin-top: 14px;
    color: var(--text-3);
    font-size: 15px;
    line-height: 1.85;
}

.module-body ul {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 8px 24px;
    margin-top: 18px;
    padding: 0;
    list-style: none;
}

.module-body li {
    position: relative;
    padding-left: 16px;
    color: var(--text-2);
    font-size: 14px;
}

.module-body li::before {
    content: "";
    position: absolute;
    top: 9px;
    left: 0;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--primary);
}

.about-simple {
    max-width: 760px;
    margin: 0 auto;
}

.about-simple p {
    color: var(--text-3);
    font-size: 16px;
    line-height: 1.95;
}

.about-simple p + p {
    margin-top: 18px;
}

.about-simple a {
    color: var(--primary);
}

.about-simple-actions {
    display: flex;
    gap: 12px;
    margin-top: 32px;
}

.contact-simple {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
    max-width: 920px;
    margin: 0 auto;
}

.contact-simple-card {
    padding: 34px;
    border: 1px solid var(--border-light);
    border-radius: var(--radius);
    background: var(--bg-1);
}

.contact-simple-card h2 {
    font-size: 20px;
}

.contact-simple-card p {
    margin-top: 14px;
    color: var(--text-3);
    font-size: 15px;
    line-height: 1.8;
}

.contact-simple-card .btn {
    margin-top: 20px;
}

.contact-mail {
    display: inline-block;
    margin-top: 16px;
    color: var(--primary);
    font-size: 22px;
    font-weight: 700;
    word-break: break-all;
}

@media (max-width: 900px) {
    .flow-steps {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .integration-grid,
    .contact-simple {
        grid-template-columns: minmax(0, 1fr);
    }

    .help-entry {
        flex-direction: column;
        align-items: flex-start;
        padding: 28px;
    }
}

@media (max-width: 640px) {
    .hero-simple {
        padding: 72px 0 56px;
    }

    .flow-steps {
        grid-template-columns: minmax(0, 1fr);
    }

    .module-row {
        grid-template-columns: minmax(0, 1fr);
        gap: 12px;
        padding: 28px 0;
    }

    .module-body ul {
        grid-template-columns: minmax(0, 1fr);
    }

    .help-entry-actions,
    .about-simple-actions {
        flex-wrap: wrap;
        width: 100%;
    }

    .help-entry-actions .btn,
    .about-simple-actions .btn {
        flex: 1 1 100%;
    }
}

/* 宽屏分区：内容区 1360，区块各自限宽 */
.features-grid,
.flow-steps,
.help-entry {
    max-width: 1360px;
    margin-left: auto;
    margin-right: auto;
}

.integration-grid {
    max-width: 1360px;
    margin-left: auto;
    margin-right: auto;
}

.module-list {
    max-width: 1360px;
}

.module-body p {
    max-width: 1100px;
}


@media (max-width: 640px) {
    .footer-trust {
        flex-direction: column;
        align-items: flex-start;
    }
}